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Colour

#81B2FF

  • #81B2FF
  • Blue
  • Dark
  • Nearest: Cornflower blue

#81B2FF is a blue with RGB values 129, 178, 255 and HSL 217°, 100%, 75%. It is a dark colour, so black text on it reaches 9.7:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#81B2FF#81B2FF
HEX#81B2FF
RGBrgb(129, 178, 255)
RGB (0–1)0.5059, 0.698, 1
RGB percentages50.6%, 69.8%, 100%
HSLhsl(216.7, 100%, 75.3%)
HSV / HSBhsv(216.7, 49.4%, 100%)
CMYK49.4%, 30.2%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,499,967
CSS custom property--colour: #81B2FF;

Brightness & contrast

Relative luminance0.43728WCAG 2.x, 0 is black and 1 is white
Perceived brightness176 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.75:1
Contrast with white2.15:1WCAG normal text: Fail
Contrast with black9.75:1WCAG normal text: AAA
Greyscale equivalent#ADADAD
Inverted#7E4D00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#94B7FFno red cones; affects about 1% of men; ΔE 4.8 from the original
Deuteranopia#85ABFDno green cones; the most common form, about 1% of men; ΔE 4.9 from the original
Tritanopia#47C3CDno blue cones; rare, and affects men and women equally; ΔE 44.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.15:1WCAG large text: Fail
Contrast with black, large text9.75:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 12.9Deep skyblue · ΔE 22.1Light skyblue · ΔE 22.4Steel blue · ΔE 24Dodgerblue · ΔE 24.6Light steelblue · ΔE 29.2
Nearest named CSS colourCornflower blue (#6495ED)ΔE 12.86, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFCE81
Analogous#81F1FF, #8F81FF
Triadic#FF81B2, #B2FF81
Split complementary#FF8F81, #F1FF81
Tetradic#FF81F1, #FFCE81, #81FF8F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#E7F0FF
Lighter +10%#B4D1FF
Darker −10%#4E93FF
Darker −20%#1B74FF
Darker −30%#005AE7
Darker −40%#0046B4
More saturated +25%#81B2FF
Less saturated −25%#91B6EF

Channel breakdown

R129
G178
B255
Red129 (50.6%)
Green178 (69.8%)
Blue255 (100%)
Hue216.67°
Saturation (HSL)100%
Lightness75.29%
Dominant channelBlue
Hex per channelR 81 · G B2 · B FF

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Every value on this page was computed from “81b2ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.