Colour
#66FEFF
- #66FEFF
- Cyan
- Light
- Nearest: Aqua
#66FEFF is a cyan with RGB values 102, 254, 255 and HSL 180°, 100%, 70%. It is a light colour, so black text on it reaches 17.2:1 contrast (AAA for normal text). The nearest named colour is Aqua.
Colour values
#66FEFF#66FEFF
HEX#66FEFF
RGBrgb(102, 254, 255)
RGB (0–1)0.4, 0.9961, 1
RGB percentages40%, 99.6%, 100%
HSLhsl(180.4, 100%, 70%)
HSV / HSBhsv(180.4, 60%, 100%)
CMYK60%, 0.4%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,749,951
CSS custom property--colour: #66FEFF;
Brightness & contrast
Relative luminance0.80928WCAG 2.x, 0 is black and 1 is white
Perceived brightness220 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 17.19:1
Contrast with white1.22:1WCAG normal text: Fail
Contrast with black17.19:1WCAG normal text: AAA
Greyscale equivalent#DEDEDE
Inverted#990100
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.22:1WCAG large text: Fail
Contrast with black, large text17.19:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#FF6766
Analogous#66FFB3, #66B2FF
Triadic#FF66FE, #FEFF66
Split complementary#FF66B2, #FFB366
Tetradic#B366FF, #FF6766, #B2FF66
Tints, shades & saturation
Channel breakdown
R102
G254
B255
Red102 (40%)
Green254 (99.6%)
Blue255 (100%)
Hue180.39°
Saturation (HSL)100%
Lightness70%
Dominant channelBlue
Hex per channelR 66 · G FE · B FF
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