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Colour

#81B5FE

  • #81B5FE
  • Blue
  • Dark
  • Nearest: Cornflower blue

#81B5FE is a blue with RGB values 129, 181, 254 and HSL 215°, 98%, 75%. It is a dark colour, so black text on it reaches 10:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#81B5FE#81B5FE
HEX#81B5FE
RGBrgb(129, 181, 254)
RGB (0–1)0.5059, 0.7098, 0.9961
RGB percentages50.6%, 71%, 99.6%
HSLhsl(215, 98.4%, 75.1%)
HSV / HSBhsv(215, 49.2%, 99.6%)
CMYK49.2%, 28.7%, 0%, 0.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,500,734
CSS custom property--colour: #81B5FE;

Brightness & contrast

Relative luminance0.44871WCAG 2.x, 0 is black and 1 is white
Perceived brightness177.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.97:1
Contrast with white2.11:1WCAG normal text: Fail
Contrast with black9.97:1WCAG normal text: AAA
Greyscale equivalent#AFAFAF
Inverted#7E4A01

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#99B9FFno red cones; affects about 1% of men; ΔE 5.7 from the original
Deuteranopia#8AADFCno green cones; the most common form, about 1% of men; ΔE 6.4 from the original
Tritanopia#47C5CFno blue cones; rare, and affects men and women equally; ΔE 42.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.11:1WCAG large text: Fail
Contrast with black, large text9.97:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 15.1Light skyblue · ΔE 19.7Deep skyblue · ΔE 20.1Steel blue · ΔE 23.2Dodgerblue · ΔE 26.9Light steelblue · ΔE 27
Nearest named CSS colourCornflower blue (#6495ED)ΔE 15.13, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FECA81
Analogous#81F4FE, #8B81FE
Triadic#FE81B5, #B5FE81
Split complementary#FE8B81, #F4FE81
Tetradic#FE81F4, #FECA81, #81FE8B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#E6F0FF
Lighter +10%#B4D3FE
Darker −10%#4E97FE
Darker −20%#1C7AFD
Darker −30%#0260E4
Darker −40%#014BB2
More saturated +25%#80B5FF
Less saturated −25%#91B8EE

Channel breakdown

R129
G181
B254
Red129 (50.6%)
Green181 (71%)
Blue254 (99.6%)
Hue215.04°
Saturation (HSL)98.43%
Lightness75.1%
Dominant channelBlue
Hex per channelR 81 · G B5 · B FE

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Every value on this page was computed from “81b5fe” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.