Encycolorpedia

#aabbd5 Kode Warna Hex

#aabbd5 Paint ChipKode warna heksadesimal #aabbd5 adalah cahaya bayangan dari cyan biru. Dalam model warna RGB #aabbd5 terdiri dari 66.67% merah, 73.33% hijau dan 83.53% biru. Di ruang warna HSL #aabbd5 memiliki hue 216° (derajat), 34% saturasi dan 75% penerangan. Warna ini memiliki panjang gelombang sekitar 477.55 nm.

Variasi Warna

Warna Nama Berhubungan

Skema Warna

Unduh: GIMP GPL Adobe ASE (Adobe Swatch Exchange) Sketch Palette

#aabbd5 gradien linier ke komplementer #cfc5b0

  1. #aabbd5
  2. #b1bdcf
  3. #b8bec9
  4. #bec0c3
  5. #c4c2bc
  6. #cac3b6
  7. #cfc5b0

Warna Monokromatik

  1. #8798b1
  2. #92a3bd
  3. #9eafc9
  4. #aabbd5
  5. #b6c7e1
  6. #c2d3ee
  7. #cee0fb

Warna dan Bayangan

#aabbd5 ke Putih

  1. #aabbd5
  2. #b8c6dc
  3. #c6d1e3
  4. #d4dcea
  5. #e3e8f1
  6. #f1f3f8
  7. #ffffff / #fff

#aabbd5 ke Hitam

  1. #aabbd5
  2. #8b99ae
  3. #6e7888
  4. #525965
  5. #373c43
  6. #1f2124
  7. #000000 / #000

Cat

Cat Serupa

  1. Sigma

    1. ★ Mistic Purple / S 2020-R70B
      #abbbd3
      ΔE = 0.669 / LRV ≈ 48.9%
    2. Mistic Purple / S 2020-R60B
      #b5bad3
      ΔE = 3.247 / LRV ≈ 49.6%
  2. Devoe Paint

    1. ★ Roslyn's Blue / 49BB 51/186
      #aebdd6
      ΔE = 1.003 / LRV ≈ 50.2%
    2. Dusky Lilac / 48BB 56/162
      #b9c6d9
      ΔE = 4.736 / LRV ≈ 55.7%
  3. Pantone / PMS

    1. ★ 651 C
      #a7bcd6
      ΔE = 1.042 / LRV ≈ 49.0%
    2. 13-3920 TCX
      #bdc6dc
      ΔE = 4.991 / LRV ≈ 56.4%
  4. Opaltone / OMS

    1. ★ 6063
      #adbad4
      ΔE = 1.069 / LRV ≈ 48.8%
    2. 6051
      #bbbdd7
      ΔE = 4.498 / LRV ≈ 51.9%
  5. Diamond Paint

    1. ★ Sunrise
      #adbdd4
      ΔE = 1.239 / LRV ≈ 50.0%
  6. Taubmans

    1. ★ Cottage Lavender / T12 39.D4
      #acbeda
      ΔE = 1.263 / LRV ≈ 50.7%
    2. Purple Passion / T12 37.D4
      #bdbed6
      ΔE = 4.854 / LRV ≈ 52.5%
  7. Bristol

    1. ★ Lilac Silk / P107-C3
      #acb9d0
      ΔE = 1.360 / LRV ≈ 48.0%
    2. Blue Purple / P111-C3
      #a1c0de
      ΔE = 3.440 / LRV ≈ 50.5%
  8. Peintures MF

    1. ★ DD414-1
      #aab8cf
      ΔE = 1.468 / LRV ≈ 47.3%
    2. CD346-2
      #adb6ce
      ΔE = 2.467 / LRV ≈ 46.8%
  9. Nippon Paint

    1. ★ Lilac Frost / NP PB 1503 P
      #b0bcd6
      ΔE = 1.514 / LRV ≈ 50.1%
    2. September Rain / NP PB 1487 P
      #bdc3dd
      ΔE = 4.747 / LRV ≈ 55.1%
  10. Earthpaint

    1. ★ 2-38-3 Periwinkle Ice
      #a9b7d2
      ΔE = 1.561 / LRV ≈ 47.0%
    2. 1-39-3 Glissade
      #b4bcdb
      ΔE = 3.458 / LRV ≈ 50.8%
  11. Crown Diamond

    1. ★ 7353-31 Morning Smile
      #a4b9d8
      ΔE = 1.950 / LRV ≈ 47.5%
    2. 7352-31 Blueberry Yogurt
      #b2b8d4
      ΔE = 3.226 / LRV ≈ 48.5%
  12. Resene

    1. ★ Comfort Zone B80-030-248
      #a2b9d2
      ΔE = 2.059 / LRV ≈ 47.0%
    2. Oxymoron B81-044-248
      #9cbfe3
      ΔE = 4.663 / LRV ≈ 49.9%
  13. Disney

    1. ★ 3A-30-2 Eeyore
      #abbcd0
      ΔE = 2.141 / LRV ≈ 49.2%
    2. 3A-10-2 Moonlight Waltz
      #a5b4d3
      ΔE = 3.025 / LRV ≈ 45.3%
  14. CIL

    1. ★ Roslyn's Blue
      #acbddd
      ΔE = 2.250 / LRV ≈ 50.4%
    2. Noteworthy
      #bebed5
      ΔE = 5.136 / LRV ≈ 52.6%
  15. TRUMATCH

    1. ★ 37-e2
      #b0b9d4
      ΔE = 2.273 / LRV ≈ 48.7%
    2. 37-e1
      #b8c1de
      ΔE = 3.832 / LRV ≈ 53.6%
  16. Dunn-Edwards

    1. ★ Misted Eve / 938
      #a2b7cf
      ΔE = 2.295 / LRV ≈ 46.1%
    2. Anchors Away / 887
      #9ebbcd
      ΔE = 5.065 / LRV ≈ 47.2%
  17. California Paints

    1. ★ DE 5884 - Misted Eve
      #a2b7cf
      ΔE = 2.295 / LRV ≈ 46.1%
    2. DE 5814 - Anchors Away
      #9ebbcd
      ΔE = 5.065 / LRV ≈ 47.2%
  18. Games Workshop - Citadel

    1. Etherium Blue / Blue Horror
      #a2bad2
      ΔE = 2.328 / LRV ≈ 47.5%
  19. British Standard

    1. BS 4800 20 C 35 - Blue
      #a5b5cc
      ΔE = 2.421 / LRV ≈ 45.4%
    2. BS381 172 - Pale roundel blue
      #93b5d1
      ΔE = 5.164 / LRV ≈ 43.9%
  20. Berger

    1. Scuba Blue / 7273
      #a7bdde
      ΔE = 2.450 / LRV ≈ 49.9%
    2. Blissful blue / 7297
      #a4bfd9
      ΔE = 2.661 / LRV ≈ 50.2%
  21. Vista Paint

    1. Scuba Blue
      #a7bdde
      ΔE = 2.450 / LRV ≈ 49.9%
    2. Blissful Blue
      #a4bfd9
      ΔE = 2.661 / LRV ≈ 50.2%
  22. Scib Paints

    1. Scuba Blue / 7273
      #a7bdde
      ΔE = 2.450 / LRV ≈ 49.9%
    2. Blissful blue / 7297
      #a4bfd9
      ΔE = 2.661 / LRV ≈ 50.2%
  23. Pratt & Lambert

    1. Cool Whisper 27-27
      #a2b9d0
      ΔE = 2.482 / LRV ≈ 46.9%
    2. Blue Star 28-7
      #a2aec5
      ΔE = 4.729 / LRV ≈ 42.0%
  24. Albany Paint

    1. China Blue
      #aebfd3
      ΔE = 2.501 / LRV ≈ 51.0%
    2. Bluebird
      #aac4e2
      ΔE = 3.572 / LRV ≈ 53.5%
  25. Wattyl

    1. Sky Blume / D77W
      #b3c1d9
      ΔE = 2.511 / LRV ≈ 52.7%
    2. Dream Space / E22W
      #9fc3e2
      ΔE = 4.723 / LRV ≈ 51.9%
  26. KILZ

    1. Delicate Blue / B881
      #a2bcdc
      ΔE = 2.563 / LRV ≈ 48.8%
    2. Silver Falls / B791
      #bbc3d5
      ΔE = 4.596 / LRV ≈ 54.4%
  27. AMC

    1. Wedgewood Blue
      #9fb8d2
      ΔE = 2.621 / LRV ≈ 46.3%
    2. Diamond Blue
      #9fc3e6
      ΔE = 5.024 / LRV ≈ 52.1%
  28. Evonik-Degussa

    1. 7191P Faded Violet
      #b5bfd7
      ΔE = 2.634 / LRV ≈ 52.0%
    2. 5181P Heather Ashes
      #b9b9cd
      ΔE = 4.768 / LRV ≈ 49.4%
  29. McCormick Paints

    1. Blissful Blue
      #a4bfd9
      ΔE = 2.661 / LRV ≈ 50.2%
  30. Brillux

    1. 57.12.15
      #a2b4d0
      ΔE = 2.675 / LRV ≈ 44.9%
    2. 57.12.12
      #b4c6e0
      ΔE = 3.940 / LRV ≈ 55.5%
  31. Nerolac

    1. Blue Tie - 4244
      #a1bcd5
      ΔE = 2.708 / LRV ≈ 48.3%
    2. Blue Tonic - 4250
      #99b8d5
      ΔE = 3.819 / LRV ≈ 45.9%
  32. Coronado Paint

    1. 7273 - Scuba Blue
      #a0bdda
      ΔE = 2.840 / LRV ≈ 48.9%
    2. 7297 - Blissful Blue
      #9cbcd1
      ΔE = 4.809 / LRV ≈ 47.6%
  33. PPG Pittsburgh Paints

    1. Everlasting / PPG1161-3
      #a1bed9
      ΔE = 2.938 / LRV ≈ 49.4%
    2. Sterling Silver / PPG1163-4
      #9eafc2
      ΔE = 5.225 / LRV ≈ 41.8%
  34. Porter Paints

    1. Everlasting / 349-3
      #a1bed9
      ΔE = 2.938 / LRV ≈ 49.4%
    2. Always Blue / 451-3
      #a1b9cb
      ΔE = 4.192 / LRV ≈ 46.6%
  35. Zoffany

    1. Porcelain
      #aec3e0
      ΔE = 2.974 / LRV ≈ 53.4%
  36. Tikkurila

    1. X351
      #a8c1e1
      ΔE = 3.008 / LRV ≈ 51.9%
    2. H431
      #97b9d2
      ΔE = 4.745 / LRV ≈ 45.9%
  37. Brighto Paints

    1. 4-39-3 Monet Lavender
      #adbacb
      ΔE = 3.032 / LRV ≈ 48.3%
    2. 4-37-3 Soft Ballad
      #a7bdcd
      ΔE = 4.300 / LRV ≈ 49.0%
  38. Ford

    1. Vineyard Blue
      #abc0d4
      ΔE = 3.037 / LRV ≈ 51.1%
    2. Athenian Gray
      #b7c5e2
      ΔE = 4.179 / LRV ≈ 55.5%
  39. Federal Standard

    1. Federal Standard 35488
      #a1bbd1
      ΔE = 3.199 / LRV ≈ 47.7%
    2. Federal Standard 15450
      #97bcd5
      ΔE = 5.142 / LRV ≈ 47.3%
  40. Martha Stewart Living

    1. Wisteria B13
      #b2c0d2
      ΔE = 3.248 / LRV ≈ 51.8%
    2. Lilac B15
      #b6c7df
      ΔE = 4.371 / LRV ≈ 56.1%
  41. Flügger

    1. Noble Blue (IN-767)
      #a4b7ca
      ΔE = 3.261 / LRV ≈ 46.0%
    2. Klassicisme: Berlinerblå (No.14)
      #b6c6e1
      ΔE = 4.121 / LRV ≈ 55.8%
  42. Beckers

    1. Skilla 779 / S 1515-B20G
      #b8c0d7
      ΔE = 3.375 / LRV ≈ 52.8%
    2. Midsommarnatt 756 / S 1908-B
      #bebed3
      ΔE = 5.175 / LRV ≈ 52.5%
  43. GM / General Motors

    1. Venetian Blue
      #9bb7d7
      ΔE = 3.539 / LRV ≈ 45.7%
    2. Light Silver
      #9bb5cb
      ΔE = 4.266 / LRV ≈ 44.3%
  44. Plascon

    1. Twin Crystal B3-D2-3
      #9cbcd8
      ΔE = 3.596 / LRV ≈ 48.0%
    2. Let it Rain B4-C2-3
      #b0c8e8
      ΔE = 4.950 / LRV ≈ 56.4%
  45. Duron

    1. Aleutian
      #a3b2d1
      ΔE = 3.621 / LRV ≈ 44.2%
    2. Windy Blue
      #b9c4d6
      ΔE = 4.469 / LRV ≈ 54.6%
  46. Behr

    1. Blue Suede PPU14-10
      #9bb5cf
      ΔE = 3.623 / LRV ≈ 44.5%
    2. Charismatic Sky M520-3
      #9ac1dd
      ΔE = 5.196 / LRV ≈ 50.2%
  47. Sto

    1. 35122
      #aabecf
      ΔE = 3.667 / LRV ≈ 49.9%
    2. 35222
      #9ebacc
      ΔE = 4.932 / LRV ≈ 46.7%
  48. Natural Color System / NCS

    1. S 1515-R90B
      #b0c2d4
      ΔE = 3.740 / LRV ≈ 52.6%
    2. S 2010-R80B
      #b0b5c3
      ΔE = 4.840 / LRV ≈ 46.2%
  49. Olympic

    1. Charisma A47-3
      #a0bfe1
      ΔE = 3.757 / LRV ≈ 50.2%
    2. Valor A51-3
      #9fbfd8
      ΔE = 3.917 / LRV ≈ 49.6%
  50. Rodda Paint

    1. Favorite Things 7233
      #b2bccb
      ΔE = 3.790 / LRV ≈ 49.7%
    2. Scuba Blue 7273
      #acc6df
      ΔE = 4.163 / LRV ≈ 54.5%
  51. Cloverdale Paint

    1. Favorite Things / 7233
      #b2bccb
      ΔE = 3.790 / LRV ≈ 49.7%
    2. Violet Vista / 7226
      #bac3d8
      ΔE = 4.108 / LRV ≈ 54.4%
  52. Toyo Ink

    1. CF10426
      #99b7d5
      ΔE = 3.799 / LRV ≈ 45.4%
    2. CF10704
      #b2bac9
      ΔE = 3.903 / LRV ≈ 48.8%
  53. Laura Ashley

    1. 1409 Navy 3
      #9fb8cc
      ΔE = 3.922 / LRV ≈ 46.0%
    2. 1403 Chambray 3
      #99bbd4
      ΔE = 4.507 / LRV ≈ 47.1%
  54. Dulux Australia

    1. Mist / G81
      #b7c2d4
      ΔE = 3.926 / LRV ≈ 53.4%
    2. Alley / A381
      #b8c5d9
      ΔE = 4.291 / LRV ≈ 55.1%
  55. Valspar Paint

    1. Maxwell Street Blue R173D
      #9eb9ce
      ΔE = 3.933 / LRV ≈ 46.4%
    2. Degas Blue X75R160D
      #9cb6d9
      ΔE = 3.947 / LRV ≈ 45.5%
  56. Jotun

    1. 4165 / Spa
      #a6c4e0
      ΔE = 3.952 / LRV ≈ 53.0%
  57. Tollens

    1. T2012-2
      #99bad9
      ΔE = 3.959 / LRV ≈ 46.9%
    2. TF254-2
      #99b3cd
      ΔE = 4.219 / LRV ≈ 43.4%
  58. Caparol

    1. 78 4 240 / Pacific 50
      #a0b0cc
      ΔE = 4.011 / LRV ≈ 42.9%
    2. 80 7 240 / Pacific 80
      #94b4d0
      ΔE = 4.987 / LRV ≈ 43.5%
  59. Jedynka

    1. Azúrkék Ég
      #9bbdd9
      ΔE = 4.021 / LRV ≈ 48.4%
  60. Kelly-Moore

    1. Beecher Falls / KM3124-2
      #9cb5cb
      ΔE = 4.056 / LRV ≈ 44.4%
    2. Gaugin's Blue / KM3141-2
      #97bdd8
      ΔE = 5.041 / LRV ≈ 47.9%
  61. Ralph Lauren

    1. Chi / RLVM284
      #b8c4d8
      ΔE = 4.076 / LRV ≈ 54.6%
    2. Indian Sky / RLVM289
      #b5b7c6
      ΔE = 4.956 / LRV ≈ 47.8%
  62. Crown Paint

    1. Lupin
      #a0b8de
      ΔE = 4.222 / LRV ≈ 47.0%
    2. Blue Light
      #b2c8e0
      ΔE = 4.647 / LRV ≈ 56.2%
  63. Crayola

    1. Cadet Blue
      #a9b2c3
      ΔE = 4.400 / LRV ≈ 44.2%
  64. Dutch Boy

    1. Sweet Lilac
      #a7b2d4
      ΔE = 4.427 / LRV ≈ 44.8%
    2. Comforting Blue
      #a6bac8
      ΔE = 4.823 / LRV ≈ 47.4%
  65. Sherwin-Williams

    1. Awesome Violet - 6815
      #a7b2d4
      ΔE = 4.427 / LRV ≈ 44.8%
    2. Celestial - 6808
      #97b3d0
      ΔE = 4.447 / LRV ≈ 43.4%
  66. Habitat

    1. Sky
      #9dc1e0
      ΔE = 4.495 / LRV ≈ 50.7%
  67. New Look

    1. Water Stones / E22-08
      #a0bacc
      ΔE = 4.500 / LRV ≈ 46.9%
    2. Believe in Miracles / E22-02
      #9fc3e2
      ΔE = 4.723 / LRV ≈ 51.9%
  68. General Paint

    1. Kingfisher / CL 2323W
      #aabfce
      ΔE = 4.596 / LRV ≈ 50.3%
    2. Proxy / CL 2332W
      #a8c5db
      ΔE = 4.689 / LRV ≈ 53.4%
  69. Diamond Vogel

    1. Innuendo / 0609
      #a1bee5
      ΔE = 4.629 / LRV ≈ 50.1%
    2. Blue Pot / 0624
      #a1b1c2
      ΔE = 4.956 / LRV ≈ 42.9%
  70. Colortrend

    1. 0609
      #a1bee5
      ΔE = 4.629 / LRV ≈ 50.1%
    2. 0624
      #a1b1c2
      ΔE = 4.956 / LRV ≈ 42.9%
  71. Glidden

    1. Blue Collar / 09BB 51/218
      #9cbfe3
      ΔE = 4.663 / LRV ≈ 49.9%
    2. Paris Sky Blue / 10BB 42/159
      #97afc9
      ΔE = 5.206 / LRV ≈ 41.5%
  72. Clark+Kensington

    1. Vantage Point / 38B-4
      #9aafca
      ΔE = 4.764 / LRV ≈ 41.8%
    2. Partyopolis / 38D-3
      #99afd0
      ΔE = 5.177 / LRV ≈ 42.0%
  73. Dulux

    1. Royal Regatta 6
      #9cbfd7
      ΔE = 4.773 / LRV ≈ 49.2%
    2. 36BB 46/231
      #94b7db
      ΔE = 5.213 / LRV ≈ 45.3%
  74. Sikkens

    1. S9.18.69
      #98bdd8
      ΔE = 4.811 / LRV ≈ 48.0%
    2. T4.20.66
      #95b8da
      ΔE = 4.826 / LRV ≈ 45.7%
  75. Focoltone

    1. 1049
      #a2c3e7
      ΔE = 4.817 / LRV ≈ 52.5%
  76. Volkswagen

    1. Diamond Silver
      #afb8c4
      ΔE = 4.820 / LRV ≈ 47.4%
  77. ICI Paints

    1. Aristocratic 10BB 50/177
      #96b9d3
      ΔE = 4.835 / LRV ≈ 45.9%
    2. Virtuoso 30BB 47/179
      #95b1ce
      ΔE = 5.061 / LRV ≈ 42.3%
  78. Chrysler

    1. Avon Blue
      #9cc1dc
      ΔE = 4.869 / LRV ≈ 50.4%
    2. Diamond Blue
      #97bedc
      ΔE = 5.010 / LRV ≈ 48.6%
  79. Levis

    1. Mild Lavender
      #a1b1c2
      ΔE = 4.956 / LRV ≈ 42.9%
    2. Shady Blue C40
      #98b6cb
      ΔE = 5.146 / LRV ≈ 44.4%
  80. Alcro

    1. Budgie blue
      #b5bfcb
      ΔE = 4.975 / LRV ≈ 51.4%
    2. Storsjo
      #9cb8ca
      ΔE = 5.177 / LRV ≈ 45.6%
  81. Benjamin Moore

    1. Sheer Romance / 837
      #9bb5c8
      ΔE = 5.007 / LRV ≈ 44.2%
    2. Porcelain Glaze / CSP-550
      #9bb3c6
      ΔE = 5.093 / LRV ≈ 43.3%
  82. Asian Paints

    1. Peaceful Blue / 9193
      #9cc2e4
      ΔE = 5.096 / LRV ≈ 51.3%
    2. Marine Coast / 9201
      #96b3ca
      ΔE = 5.224 / LRV ≈ 43.0%
  83. Australian Standard AS2700

    1. B32 Powder Blue
      #b6c8db
      ΔE = 5.179 / LRV ≈ 56.4%

Simulasi Buta Warna

Monokromasi

Dikromasi

Trikromasi

#aabbd5 Contoh Kode HTML / CSS

#aabbd5 foreground

Orang yang bisa mengendalikan emosinya adalah pemenang sejati.

<p style="color: #aabbd5">…</p>

#aabbd5 background

Hidup adalah 10% apa yang terjadi pada Anda dan 90% bagaimana Anda bereaksi terhadap kondisi itu.

<p style="background-color: #aabbd5">…</p>

#aabbd5 bayangan

Persiapan yang terbaik untuk hari esok adalah melakukan pekerjaan hari ini dengan sangat baik.

<p style="text-shadow: 0.1em 0.1em 0.15em #aabbd5">…</p>

Grafik Warna

Konversi Ruang Warna

Desimal
11189205
Biner
10101010, 10111011, 11010101
Heksadesimal
#aabbd5
LRV
≈ 48.9%
Hex pendek terdekat
#abd ΔE = 2.537
RGB
rgb(170, 187, 213)
RGBA
rgba(170, 187, 213, 1.0)
rg kromatisitas
r: 0.298, g: 0.328, b: 0.374
RYB
merah: 66.667%, kuning: 71.444%, biru: 83.529%
Android / android.graphics.Color
-5588011 / 0xffaabbd5
HSL
hsl(216, 34%, 75%)
HSLA
hsla(216, 34%, 75%, 1.0)
HSV / HSB
hue: 216° (216.279), saturasi: 20% (0.202), nilai: 84% (0.835)
HSP
hue: 216.279, saturasi: 20.188%, persepsi cahaya: 72.671%
HSLuv (HUSL)
H: 246.166, S: 37.833, L: 75.383
Cubehelix
H: -146.338, S: 0.314, L: 0.725
TSL
T: -1.951, S: 0.048, L: 0.725
CMYK
cyan: 20% (0.202), magenta: 12% (0.122), kuning: 0% (0.000), kunci: 16% (0.165)
CMY
cyan: 33% (0.333), magenta: 27% (0.267), kuning: 16% (0.165)
XYZ
X: 46.355, Y: 48.890, Z: 69.932
xyY
x: 0.281, y: 0.296, Y: 48.890
CIELab
L: 75.383, a: -0.320, b: -15.002
CIELuv
L: 75.383, u: -10.242, v: -23.185
CIELCH / LCHab
L: 75.383, C: 15.005, H: 268.778
CIELUV / LCHuv
L: 75.383, C: 25.346, H: 246.166
Hunter-Lab
L: 69.921, a: -4.023, b: -10.355
CIECAM02
J: 67.303, C: 21.644, h: 251.307, Q: 161.633, M: 18.927, s: 34.220, H: 306.655
OSA-UCS
penerangan: -10.145, jaune: -2.647, hijau: 0.884
LMS
L: 43.615, M: 50.801, S: 69.575
YCbCr
Y: 174.812, Cb: 141.930, Cr: 118.691
YCgCo
Y: 189.250, Cg: -2.250, Co: 31.750
YDbDr
Y: 184.881, Db: 42.308, Dr: 28.303
YPbPr
Y: 185.251, Pb: 14.955, Pr: -9.696
xvYCC
Y: 175.098, Cb: 141.137, Cr: 119.483
YIQ
Y: 184.881, I: -18.480, Q: 4.495
YUV
Y: 184.881, U: 13.839, V: -13.055
Sistem Warna Munsell
7.5PB 7/4 ΔE = 2.438
Warna Merek
Heroku (light) ΔE = 7.804

Warna Acak

Merah

Hijau

Biru