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Recognised as Colour

#51ABC6

  • #51ABC6
  • Cyan
  • Dark
  • Nearest: Sky blue

#51ABC6 is a cyan with RGB values 81, 171, 198 and HSL 194°, 51%, 55%. It is a dark colour, so black text on it reaches 8:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#51ABC6#51ABC6
HEX#51ABC6
RGBrgb(81, 171, 198)
RGB (0–1)0.3176, 0.6706, 0.7765
RGB percentages31.8%, 67.1%, 77.6%
HSLhsl(193.8, 50.6%, 54.7%)
HSV / HSBhsv(193.8, 59.1%, 77.6%)
CMYK59.1%, 13.6%, 0%, 22.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,352,390
CSS custom property--colour: #51ABC6;

Brightness & contrast

Relative luminance0.34952WCAG 2.x, 0 is black and 1 is white
Perceived brightness153.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.99:1
Contrast with white2.63:1WCAG normal text: Fail
Contrast with black7.99:1WCAG normal text: AAA
Greyscale equivalent#9A9A9A
Inverted#AE5439

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#9BA7C7no red cones; affects about 1% of men; ΔE 22.2 from the original
Deuteranopia#899AC6no green cones; the most common form, about 1% of men; ΔE 23.4 from the original
Tritanopia#00B4B3no blue cones; rare, and affects men and women equally; ΔE 21.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.63:1WCAG large text: Fail
Contrast with black, large text7.99:1WCAG large text: AAA

Named colours

Sky blue · ΔE 14.1Cadetblue · ΔE 15.2Light skyblue · ΔE 17.5Deep skyblue · ΔE 21.8Dark cyan · ΔE 22Light slate grey · ΔE 22.1
Nearest named CSS colourSky blue (#87CEEB)ΔE 14.12, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C66C51
Analogous#51C6A6, #5171C6
Triadic#C651AB, #ABC651
Split complementary#C65171, #C6A651
Tetradic#A651C6, #C66C51, #71C651

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EBF5F8
Lighter +30%#C4E3EC
Lighter +20%#9ED0DF
Lighter +10%#77BED3
Darker −10%#3891AC
Darker −20%#2C7185
Darker −30%#1F505F
Darker −40%#133038
More saturated +25%#34BBE3
Less saturated −25%#6E9BA9

Channel breakdown

R81
G171
B198
Red81 (31.8%)
Green171 (67.1%)
Blue198 (77.6%)
Hue193.85°
Saturation (HSL)50.65%
Lightness54.71%
Dominant channelBlue
Hex per channelR 51 · G AB · B C6

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Every value on this page was computed from “51abc6” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.