Recognised as Colour
#428A9B
- #428A9B
- Cyan
- Dark
- Nearest: Cadetblue
#428A9B is a cyan with RGB values 66, 138, 155 and HSL 191°, 40%, 43%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Cadetblue.
Colour values
#428A9B#428A9B
HEX#428A9B
RGBrgb(66, 138, 155)
RGB (0–1)0.2588, 0.5412, 0.6078
RGB percentages25.9%, 54.1%, 60.8%
HSLhsl(191.5, 40.3%, 43.3%)
HSV / HSBhsv(191.5, 57.4%, 60.8%)
CMYK57.4%, 11%, 0%, 39.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,360,859
CSS custom property--colour: #428A9B;
Brightness & contrast
Relative luminance0.21702WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.34:1
Contrast with white3.93:1WCAG normal text: Fail
Contrast with black5.34:1WCAG normal text: AA
Greyscale equivalent#7C7C7C
Inverted#BD7564
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.93:1WCAG large text: AA
Contrast with black, large text5.34:1WCAG large text: AAA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#9B5342
Analogous#429B80, #425D9B
Triadic#9B428A, #8A9B42
Split complementary#9B425D, #9B7F42
Tetradic#80429B, #9B5342, #5E9B42
Tints, shades & saturation
Channel breakdown
R66
G138
B155
Red66 (25.9%)
Green138 (54.1%)
Blue155 (60.8%)
Hue191.46°
Saturation (HSL)40.27%
Lightness43.33%
Dominant channelBlue
Hex per channelR 42 · G 8A · B 9B
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