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Recognised as Colour

#81ACE8

  • #81ACE8
  • Blue
  • Dark
  • Nearest: Light skyblue

#81ACE8 is a blue with RGB values 129, 172, 232 and HSL 215°, 69%, 71%. It is a dark colour, so black text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Light skyblue.

Colour values

#81ACE8#81ACE8
HEX#81ACE8
RGBrgb(129, 172, 232)
RGB (0–1)0.5059, 0.6745, 0.9098
RGB percentages50.6%, 67.5%, 91%
HSLhsl(215, 69.1%, 70.8%)
HSV / HSBhsv(215, 44.4%, 91%)
CMYK44.4%, 25.9%, 0%, 9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer8,498,408
CSS custom property--colour: #81ACE8;

Brightness & contrast

Relative luminance0.39998WCAG 2.x, 0 is black and 1 is white
Perceived brightness168.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9:1
Contrast with white2.33:1WCAG normal text: Fail
Contrast with black9:1WCAG normal text: AAA
Greyscale equivalent#A7A7A7
Inverted#7E5317

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#95AFEBno red cones; affects about 1% of men; ΔE 5.1 from the original
Deuteranopia#89A5E7no green cones; the most common form, about 1% of men; ΔE 6.1 from the original
Tritanopia#59B9C1no blue cones; rare, and affects men and women equally; ΔE 34.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.33:1WCAG large text: Fail
Contrast with black, large text9:1WCAG large text: AAA

Named colours

Light skyblue · ΔE 16.9Steel blue · ΔE 17.9Cornflower blue · ΔE 18.4Deep skyblue · ΔE 20.6Light steelblue · ΔE 21.5Sky blue · ΔE 23
Nearest named CSS colourLight skyblue (#87CEFA)ΔE 16.91, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E8BD81
Analogous#81E0E8, #8981E8
Triadic#E881AC, #ACE881
Split complementary#E88981, #E0E881
Tetradic#E881E0, #E8BD81, #81E889

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#D7E5F8
Lighter +10%#ACC8F0
Darker −10%#5690E0
Darker −20%#2B73D8
Darker −30%#205CB0
Darker −40%#184685
More saturated +25%#6EA9FB
Less saturated −25%#94AFD5

Channel breakdown

R129
G172
B232
Red129 (50.6%)
Green172 (67.5%)
Blue232 (91%)
Hue214.95°
Saturation (HSL)69.13%
Lightness70.78%
Dominant channelBlue
Hex per channelR 81 · G AC · B E8

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Every value on this page was computed from “81ace8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.