Recognised as Colour
#EF243D
- #EF243D
- Red
- Dark
- Nearest: Crimson
#EF243D is a red with RGB values 239, 36, 61 and HSL 353°, 86%, 54%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Crimson.
Colour values
#EF243D#EF243D
HEX#EF243D
RGBrgb(239, 36, 61)
RGB (0–1)0.9373, 0.1412, 0.2392
RGB percentages93.7%, 14.1%, 23.9%
HSLhsl(352.6, 86.4%, 53.9%)
HSV / HSBhsv(352.6, 84.9%, 93.7%)
CMYK0%, 84.9%, 74.5%, 6.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,672,381
CSS custom property--colour: #EF243D;
Brightness & contrast
Relative luminance0.19949WCAG 2.x, 0 is black and 1 is white
Perceived brightness135.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.99:1
Contrast with white4.21:1WCAG normal text: Fail
Contrast with black4.99:1WCAG normal text: AA
Greyscale equivalent#515151
Inverted#10DBC2
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.21:1WCAG large text: AA
Contrast with black, large text4.99:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#24EFD6
Analogous#EF24A2, #EF7024
Triadic#3DEF24, #243DEF
Split complementary#24EF70, #24A2EF
Tetradic#A3EF24, #24EFD6, #7124EF
Tints, shades & saturation
Channel breakdown
R239
G36
B61
Red239 (93.7%)
Green36 (14.1%)
Blue61 (23.9%)
Hue352.61°
Saturation (HSL)86.38%
Lightness53.92%
Dominant channelRed
Hex per channelR EF · G 24 · B 3D
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