Recognised as Colour
#DF3737
- #DF3737
- Red
- Dark
- Nearest: Crimson
#DF3737 is a red with RGB values 223, 55, 55 and HSL 0°, 72%, 55%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Crimson.
Colour values
#DF3737#DF3737
HEX#DF3737
RGBrgb(223, 55, 55)
RGB (0–1)0.8745, 0.2157, 0.2157
RGB percentages87.5%, 21.6%, 21.6%
HSLhsl(0, 72.4%, 54.5%)
HSV / HSBhsv(0, 75.3%, 87.5%)
CMYK0%, 75.3%, 75.3%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer14,628,663
CSS custom property--colour: #DF3737;
Brightness & contrast
Relative luminance0.18696WCAG 2.x, 0 is black and 1 is white
Perceived brightness130.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.74:1
Contrast with white4.43:1WCAG normal text: Fail
Contrast with black4.74:1WCAG normal text: AA
Greyscale equivalent#5B5B5B
Inverted#20C8C8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.43:1WCAG large text: AA
Contrast with black, large text4.74:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#37DFDF
Analogous#DF378B, #DF8B37
Triadic#37DF37, #3737DF
Split complementary#37DF8B, #378BDF
Tetradic#8BDF37, #37DFDF, #8B37DF
Tints, shades & saturation
Channel breakdown
R223
G55
B55
Red223 (87.5%)
Green55 (21.6%)
Blue55 (21.6%)
Hue0°
Saturation (HSL)72.41%
Lightness54.51%
Dominant channelRed
Hex per channelR DF · G 37 · B 37
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