Colour

#C51C15

#C51C15
Red
Dark
Nearest: Firebrick

#C51C15 is a red with RGB values 197, 28, 21 and HSL 2°, 81%, 43%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#C51C15#C51C15

HEX#C51C15

RGBrgb(197, 28, 21)

RGB (0–1)0.7725, 0.1098, 0.0824

RGB percentages77.3%, 11%, 8.2%

HSLhsl(2.4, 80.7%, 42.7%)

HSV / HSBhsv(2.4, 89.3%, 77.3%)

CMYK0%, 85.8%, 89.3%, 22.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,917,781

CSS custom property--colour: #C51C15;

Brightness & contrast

Relative luminance0.12755WCAG 2.x, 0 is black and 1 is white

Perceived brightness110.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.91:1

Contrast with white5.91:1WCAG normal text: AA

Contrast with black3.55:1WCAG normal text: Fail

Greyscale equivalent#3F3F3F

Inverted#3AE3EA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#574D10no red cones; affects about 1% of men; ΔE 67.8 from the original

Deuteranopia#7F7104no green cones; the most common form, about 1% of men; ΔE 67.8 from the original

Tritanopia#DA001Eno blue cones; rare, and affects men and women equally; ΔE 9.6 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text5.91:1WCAG large text: AAA

Contrast with black, large text3.55:1WCAG large text: AA

Named colours

Firebrick · ΔE 13.1 Crimson · ΔE 17.8 Dark red · ΔE 19.7 Tomato · ΔE 20.4 Brown · ΔE 22.6 Maroon · ΔE 24.5

Nearest named CSS colourFirebrick (#B22222)ΔE 13.12, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#15BEC5

Analogous#C51566, #C57415

Triadic#15C51C, #1C15C5

Split complementary#15C574, #1566C5

Tetradic#66C515, #15BEC5, #7415C5

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#F7B2AF

Lighter +30%#F28681

Lighter +20%#ED5953

Lighter +10%#E82D25

Darker −10%#971510

Darker −20%#690F0B

Darker −30%#3B0806

Darker −40%#0D0201

More saturated +25%#DA0900

Less saturated −25%#AA3530

Channel breakdown

R197

G28

B21

Red197 (77.3%)

Green28 (11%)

Blue21 (8.2%)

Hue2.39°

Saturation (HSL)80.73%

Lightness42.75%

Dominant channelRed

Hex per channelR C5 · G 1C · B 15

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#C51C15

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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