Recognised as Colour
#638F18
- #638F18
- Green
- Dark
- Nearest: Olivedrab
#638F18 is a green with RGB values 99, 143, 24 and HSL 82°, 71%, 33%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Olivedrab.
Colour values
#638F18#638F18
HEX#638F18
RGBrgb(99, 143, 24)
RGB (0–1)0.3882, 0.5608, 0.0941
RGB percentages38.8%, 56.1%, 9.4%
HSLhsl(82.2, 71.3%, 32.7%)
HSV / HSBhsv(82.2, 83.2%, 56.1%)
CMYK30.8%, 0%, 83.2%, 43.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,524,696
CSS custom property--colour: #638F18;
Brightness & contrast
Relative luminance0.22364WCAG 2.x, 0 is black and 1 is white
Perceived brightness122.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.47:1
Contrast with white3.84:1WCAG normal text: Fail
Contrast with black5.47:1WCAG normal text: AA
Greyscale equivalent#7D7D7D
Inverted#9C70E7
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.84:1WCAG large text: AA
Contrast with black, large text5.47:1WCAG large text: AAA
Named colours
Hue familygreen
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#44188F
Analogous#8F7F18, #288F18
Triadic#18638F, #8F1863
Split complementary#18288F, #7F188F
Tetradic#188F7F, #44188F, #8F1828
Tints, shades & saturation
Channel breakdown
R99
G143
B24
Red99 (38.8%)
Green143 (56.1%)
Blue24 (9.4%)
Hue82.18°
Saturation (HSL)71.26%
Lightness32.75%
Dominant channelGreen
Hex per channelR 63 · G 8F · B 18
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