Recognised as Colour
#30666B
- #30666B
- Cyan
- Dark
- Nearest: Dark slate grey
#30666B is a cyan with RGB values 48, 102, 107 and HSL 185°, 38%, 30%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Dark slate grey.
Colour values
#30666B#30666B
HEX#30666B
RGBrgb(48, 102, 107)
RGB (0–1)0.1882, 0.4, 0.4196
RGB percentages18.8%, 40%, 42%
HSLhsl(185.1, 38.1%, 30.4%)
HSV / HSBhsv(185.1, 55.1%, 42%)
CMYK55.1%, 4.7%, 0%, 58%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,171,947
CSS custom property--colour: #30666B;
Brightness & contrast
Relative luminance0.11193WCAG 2.x, 0 is black and 1 is white
Perceived brightness90 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.48:1
Contrast with white6.48:1WCAG normal text: AA
Contrast with black3.24:1WCAG normal text: Fail
Greyscale equivalent#5B5B5B
Inverted#CF9994
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.48:1WCAG large text: AAA
Contrast with black, large text3.24:1WCAG large text: AA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#6B3530
Analogous#306B53, #30486B
Triadic#6B3066, #666B30
Split complementary#6B3048, #6B5330
Tetradic#53306B, #6B3530, #496B30
Tints, shades & saturation
Channel breakdown
R48
G102
B107
Red48 (18.8%)
Green102 (40%)
Blue107 (42%)
Hue185.08°
Saturation (HSL)38.06%
Lightness30.39%
Dominant channelBlue
Hex per channelR 30 · G 66 · B 6B
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