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Colour

#81A8FB

  • #81A8FB
  • Blue
  • Dark
  • Nearest: Cornflower blue

#81A8FB is a blue with RGB values 129, 168, 251 and HSL 221°, 94%, 75%. It is a dark colour, so black text on it reaches 8.9:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#81A8FB#81A8FB
HEX#81A8FB
RGBrgb(129, 168, 251)
RGB (0–1)0.5059, 0.6588, 0.9843
RGB percentages50.6%, 65.9%, 98.4%
HSLhsl(220.8, 93.8%, 74.5%)
HSV / HSBhsv(220.8, 48.6%, 98.4%)
CMYK48.6%, 33.1%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,497,403
CSS custom property--colour: #81A8FB;

Brightness & contrast

Relative luminance0.39637WCAG 2.x, 0 is black and 1 is white
Perceived brightness169.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.93:1
Contrast with white2.35:1WCAG normal text: Fail
Contrast with black8.93:1WCAG normal text: AAA
Greyscale equivalent#A6A6A6
Inverted#7E5704

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#88AFFEno red cones; affects about 1% of men; ΔE 3.5 from the original
Deuteranopia#7BA4F9no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#4CBAC6no blue cones; rare, and affects men and women equally; ΔE 47.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.35:1WCAG large text: Fail
Contrast with black, large text8.93:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 8.3Dodgerblue · ΔE 20.5Steel blue · ΔE 24.9Deep skyblue · ΔE 26.9Light skyblue · ΔE 28Medium purple · ΔE 31.7
Nearest named CSS colourCornflower blue (#6495ED)ΔE 8.29, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FBD481
Analogous#81E5FB, #9781FB
Triadic#FB81A8, #A8FB81
Split complementary#FB9781, #E5FB81
Tetradic#FB81E5, #FBD481, #81FB97

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#E4ECFE
Lighter +10%#B2CAFD
Darker −10%#5086F9
Darker −20%#1E64F8
Darker −30%#074BDC
Darker −40%#053AAB
More saturated +25%#7DA7FF
Less saturated −25%#91AEEB

Channel breakdown

R129
G168
B251
Red129 (50.6%)
Green168 (65.9%)
Blue251 (98.4%)
Hue220.82°
Saturation (HSL)93.85%
Lightness74.51%
Dominant channelBlue
Hex per channelR 81 · G A8 · B FB

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Every value on this page was computed from “81a8fb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.