Recognised as Colour
#21684E
- #21684E
- Cyan
- Dark
- Nearest: Teal
#21684E is a cyan with RGB values 33, 104, 78 and HSL 158°, 52%, 27%. It is a dark colour, so white text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Teal.
Colour values
#21684E#21684E
HEX#21684E
RGBrgb(33, 104, 78)
RGB (0–1)0.1294, 0.4078, 0.3059
RGB percentages12.9%, 40.8%, 30.6%
HSLhsl(158, 51.8%, 26.9%)
HSV / HSBhsv(158, 68.3%, 40.8%)
CMYK68.3%, 0%, 25%, 59.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,189,390
CSS custom property--colour: #21684E;
Brightness & contrast
Relative luminance0.10774WCAG 2.x, 0 is black and 1 is white
Perceived brightness85.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.66:1
Contrast with white6.66:1WCAG normal text: AA
Contrast with black3.15:1WCAG normal text: Fail
Greyscale equivalent#575757
Inverted#DE97B1
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.66:1WCAG large text: AAA
Contrast with black, large text3.15:1WCAG large text: AA
Named colours
Hue familycyan
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#68213B
Analogous#21682A, #215F68
Triadic#4E2168, #684E21
Split complementary#68215F, #682A21
Tetradic#2A2168, #68213B, #5F6821
Tints, shades & saturation
Channel breakdown
R33
G104
B78
Red33 (12.9%)
Green104 (40.8%)
Blue78 (30.6%)
Hue158.03°
Saturation (HSL)51.82%
Lightness26.86%
Dominant channelGreen
Hex per channelR 21 · G 68 · B 4E
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