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Colour

#15BBD8

  • #15BBD8
  • Cyan
  • Dark
  • Nearest: Sky blue

#15BBD8 is a cyan with RGB values 21, 187, 216 and HSL 189°, 82%, 46%. It is a dark colour, so black text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#15BBD8#15BBD8
HEX#15BBD8
RGBrgb(21, 187, 216)
RGB (0–1)0.0824, 0.7333, 0.8471
RGB percentages8.2%, 73.3%, 84.7%
HSLhsl(188.9, 82.3%, 46.5%)
HSV / HSBhsv(188.9, 90.3%, 84.7%)
CMYK90.3%, 13.4%, 0%, 15.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,424,344
CSS custom property--colour: #15BBD8;

Brightness & contrast

Relative luminance0.40658WCAG 2.x, 0 is black and 1 is white
Perceived brightness161.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.13:1
Contrast with white2.3:1WCAG normal text: Fail
Contrast with black9.13:1WCAG normal text: AAA
Greyscale equivalent#9A9A9A
Inverted#EA4427

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#A6B5DAno red cones; affects about 1% of men; ΔE 31.7 from the original
Deuteranopia#8FA4D8no green cones; the most common form, about 1% of men; ΔE 33.4 from the original
Tritanopia#00C6C4no blue cones; rare, and affects men and women equally; ΔE 19.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.3:1WCAG large text: Fail
Contrast with black, large text9.13:1WCAG large text: AAA

Named colours

Sky blue · ΔE 16.8Dark turquoise · ΔE 17.6Light skyblue · ΔE 20.2Deep skyblue · ΔE 20.3Medium turquoise · ΔE 20.6Light seagreen · ΔE 21.6
Nearest named CSS colourSky blue (#87CEEB)ΔE 16.79, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D83215
Analogous#15D893, #155AD8
Triadic#D815BB, #BBD815
Split complementary#D8155A, #D89315
Tetradic#9315D8, #D83215, #5AD815

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C0F0F9
Lighter +30%#92E6F4
Lighter +20%#63DBF0
Lighter +10%#35D0EB
Darker −10%#1093AA
Darker −20%#0C6B7B
Darker −30%#07424D
Darker −40%#031A1E
More saturated +25%#00CAED
Less saturated −25%#33A6BA

Channel breakdown

R21
G187
B216
Red21 (8.2%)
Green187 (73.3%)
Blue216 (84.7%)
Hue188.92°
Saturation (HSL)82.28%
Lightness46.47%
Dominant channelBlue
Hex per channelR 15 · G BB · B D8

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Every value on this page was computed from “15bbd8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.