Recognised as Colour
#FF042B
- #FF042B
- Red
- Dark
- Nearest: Red
#FF042B is a red with RGB values 255, 4, 43 and HSL 351°, 100%, 51%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Red.
Colour values
#FF042B#FF042B
HEX#FF042B
RGBrgb(255, 4, 43)
RGB (0–1)1, 0.0157, 0.1686
RGB percentages100%, 1.6%, 16.9%
HSLhsl(350.7, 100%, 50.8%)
HSV / HSBhsv(350.7, 98.4%, 100%)
CMYK0%, 98.4%, 83.1%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,712,747
CSS custom property--colour: #FF042B;
Brightness & contrast
Relative luminance0.21521WCAG 2.x, 0 is black and 1 is white
Perceived brightness140.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.3:1
Contrast with white3.96:1WCAG normal text: Fail
Contrast with black5.3:1WCAG normal text: AA
Greyscale equivalent#3C3C3C
Inverted#00FBD4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.96:1WCAG large text: AA
Contrast with black, large text5.3:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#04FFD8
Analogous#FF04A9, #FF5B04
Triadic#2BFF04, #042BFF
Split complementary#04FF5B, #04A9FF
Tetradic#A8FF04, #04FFD8, #5A04FF
Tints, shades & saturation
Channel breakdown
R255
G4
B43
Red255 (100%)
Green4 (1.6%)
Blue43 (16.9%)
Hue350.68°
Saturation (HSL)100%
Lightness50.78%
Dominant channelRed
Hex per channelR FF · G 04 · B 2B
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