Colour
#66FCF9
- #66FCF9
- Cyan
- Light
- Nearest: Aqua
#66FCF9 is a cyan with RGB values 102, 252, 249 and HSL 179°, 96%, 69%. It is a light colour, so black text on it reaches 16.9:1 contrast (AAA for normal text). The nearest named colour is Aqua.
Colour values
#66FCF9#66FCF9
HEX#66FCF9
RGBrgb(102, 252, 249)
RGB (0–1)0.4, 0.9882, 0.9765
RGB percentages40%, 98.8%, 97.6%
HSLhsl(178.8, 96.2%, 69.4%)
HSV / HSBhsv(178.8, 59.5%, 98.8%)
CMYK59.5%, 0%, 1.2%, 1.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,749,433
CSS custom property--colour: #66FCF9;
Brightness & contrast
Relative luminance0.79285WCAG 2.x, 0 is black and 1 is white
Perceived brightness217.8 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 16.86:1
Contrast with white1.25:1WCAG normal text: Fail
Contrast with black16.86:1WCAG normal text: AAA
Greyscale equivalent#DCDCDC
Inverted#990306
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text1.25:1WCAG large text: Fail
Contrast with black, large text16.86:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#FC6669
Analogous#66FCAE, #66B4FC
Triadic#F966FC, #FCF966
Split complementary#FC66B4, #FCAE66
Tetradic#AE66FC, #FC6669, #B4FC66
Tints, shades & saturation
Channel breakdown
R102
G252
B249
Red102 (40%)
Green252 (98.8%)
Blue249 (97.6%)
Hue178.8°
Saturation (HSL)96.15%
Lightness69.41%
Dominant channelGreen
Hex per channelR 66 · G FC · B F9
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