Recognised as Colour
#51FFDE
- #51FFDE
- Cyan
- Light
- Nearest: Aquamarine
#51FFDE is a cyan with RGB values 81, 255, 222 and HSL 169°, 100%, 66%. It is a light colour, so black text on it reaches 16.7:1 contrast (AAA for normal text). The nearest named colour is Aquamarine.
Colour values
#51FFDE#51FFDE
HEX#51FFDE
RGBrgb(81, 255, 222)
RGB (0–1)0.3176, 1, 0.8706
RGB percentages31.8%, 100%, 87.1%
HSLhsl(168.6, 100%, 65.9%)
HSV / HSBhsv(168.6, 68.2%, 100%)
CMYK68.2%, 0%, 12.9%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,373,918
CSS custom property--colour: #51FFDE;
Brightness & contrast
Relative luminance0.78543WCAG 2.x, 0 is black and 1 is white
Perceived brightness213.9 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 16.71:1
Contrast with white1.26:1WCAG normal text: Fail
Contrast with black16.71:1WCAG normal text: AAA
Greyscale equivalent#D8D8D8
Inverted#AE0021
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.26:1WCAG large text: Fail
Contrast with black, large text16.71:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#FF5172
Analogous#51FF87, #51C9FF
Triadic#DE51FF, #FFDE51
Split complementary#FF51C9, #FF8751
Tetradic#8751FF, #FF5172, #C9FF51
Tints, shades & saturation
Channel breakdown
R81
G255
B222
Red81 (31.8%)
Green255 (100%)
Blue222 (87.1%)
Hue168.62°
Saturation (HSL)100%
Lightness65.88%
Dominant channelGreen
Hex per channelR 51 · G FF · B DE
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