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Recognised as Colour

#51E2FF

  • #51E2FF
  • Cyan
  • Light
  • Nearest: Sky blue

#51E2FF is a cyan with RGB values 81, 226, 255 and HSL 190°, 100%, 66%. It is a light colour, so black text on it reaches 13.7:1 contrast (AAA for normal text). The nearest named colour is Sky blue.

Colour values

#51E2FF#51E2FF
HEX#51E2FF
RGBrgb(81, 226, 255)
RGB (0–1)0.3176, 0.8863, 1
RGB percentages31.8%, 88.6%, 100%
HSLhsl(190, 100%, 65.9%)
HSV / HSBhsv(190, 68.2%, 100%)
CMYK68.2%, 11.4%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,366,527
CSS custom property--colour: #51E2FF;

Brightness & contrast

Relative luminance0.63362WCAG 2.x, 0 is black and 1 is white
Perceived brightness198.4 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 13.67:1
Contrast with white1.54:1WCAG normal text: Fail
Contrast with black13.67:1WCAG normal text: AAA
Greyscale equivalent#C5C5C5
Inverted#AE1D00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#CDDBFFno red cones; affects about 1% of men; ΔE 33 from the original
Deuteranopia#B4C9FFno green cones; the most common form, about 1% of men; ΔE 34.7 from the original
Tritanopia#00EDEBno blue cones; rare, and affects men and women equally; ΔE 21.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.54:1WCAG large text: Fail
Contrast with black, large text13.67:1WCAG large text: AAA

Named colours

Sky blue · ΔE 15.9Dark turquoise · ΔE 17.9Light skyblue · ΔE 19.4Medium turquoise · ΔE 19.9Pale turquoise · ΔE 22.3Aqua · ΔE 22.9
Nearest named CSS colourSky blue (#87CEEB)ΔE 15.87, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF6E51
Analogous#51FFC5, #518BFF
Triadic#FF51E2, #E2FF51
Split complementary#FF518B, #FFC551
Tetradic#C551FF, #FF6E51, #8BFF51

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EAFCFF
Lighter +20%#B7F3FF
Lighter +10%#84EBFF
Darker −10%#1EDAFF
Darker −20%#00C3EA
Darker −30%#0099B7
Darker −40%#006E84
More saturated +25%#51E2FF
Less saturated −25%#67D3E9

Channel breakdown

R81
G226
B255
Red81 (31.8%)
Green226 (88.6%)
Blue255 (100%)
Hue190°
Saturation (HSL)100%
Lightness65.88%
Dominant channelBlue
Hex per channelR 51 · G E2 · B FF

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Every value on this page was computed from “51e2ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.