Recognised as Colour
#EF3431
- #EF3431
- Red
- Dark
- Nearest: Tomato
#EF3431 is a red with RGB values 239, 52, 49 and HSL 1°, 86%, 56%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Tomato.
Colour values
#EF3431#EF3431
HEX#EF3431
RGBrgb(239, 52, 49)
RGB (0–1)0.9373, 0.2039, 0.1922
RGB percentages93.7%, 20.4%, 19.2%
HSLhsl(0.9, 85.6%, 56.5%)
HSV / HSBhsv(0.9, 79.5%, 93.7%)
CMYK0%, 78.2%, 79.5%, 6.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,676,465
CSS custom property--colour: #EF3431;
Brightness & contrast
Relative luminance0.21028WCAG 2.x, 0 is black and 1 is white
Perceived brightness137.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.21:1
Contrast with white4.03:1WCAG normal text: Fail
Contrast with black5.21:1WCAG normal text: AA
Greyscale equivalent#5C5C5C
Inverted#10CBCE
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.03:1WCAG large text: AA
Contrast with black, large text5.21:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#31ECEF
Analogous#EF318D, #EF9331
Triadic#31EF34, #3431EF
Split complementary#31EF93, #318DEF
Tetradic#8DEF31, #31ECEF, #9331EF
Tints, shades & saturation
Channel breakdown
R239
G52
B49
Red239 (93.7%)
Green52 (20.4%)
Blue49 (19.2%)
Hue0.95°
Saturation (HSL)85.59%
Lightness56.47%
Dominant channelRed
Hex per channelR EF · G 34 · B 31
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Nerdulate something else
Nothing in mind? Surprise me · today’s page