Recognised as Colour

#C31C39

#C31C39
Red
Dark
Nearest: Crimson

#C31C39 is a red with RGB values 195, 28, 57 and HSL 350°, 75%, 44%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#C31C39#C31C39

HEX#C31C39

RGBrgb(195, 28, 57)

RGB (0–1)0.7647, 0.1098, 0.2235

RGB percentages76.5%, 11%, 22.4%

HSLhsl(349.6, 74.9%, 43.7%)

HSV / HSBhsv(349.6, 85.6%, 76.5%)

CMYK0%, 85.6%, 70.8%, 23.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,786,745

CSS custom property--colour: #C31C39;

Brightness & contrast

Relative luminance0.12728WCAG 2.x, 0 is black and 1 is white

Perceived brightness110.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.92:1

Contrast with white5.92:1WCAG normal text: AA

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

Greyscale equivalent#424242

Inverted#3CE3C6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#534E39no red cones; affects about 1% of men; ΔE 67.2 from the original

Deuteranopia#7C7033no green cones; the most common form, about 1% of men; ΔE 67.1 from the original

Tritanopia#D7002Ano blue cones; rare, and affects men and women equally; ΔE 15.6 from the original

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

Contrast with white, large text5.92:1WCAG large text: AAA

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

Named colours

Crimson · ΔE 10.5 Firebrick · ΔE 11.9 Brown · ΔE 14.3 Indian red · ΔE 22.2 Dark red · ΔE 22.6 Maroon · ΔE 24.4

Nearest named CSS colourCrimson (#DC143C)ΔE 10.47, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1CC3A6

Analogous#C31C8C, #C3531C

Triadic#39C31C, #1C39C3

Split complementary#1CC353, #1C8CC3

Tetradic#8CC31C, #1CC3A6, #531CC3

Tints, shades & saturation

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

Lighter +40%#F5B6C1

Lighter +30%#EE8A9B

Lighter +20%#E85D75

Lighter +10%#E1314F

Darker −10%#96162C

Darker −20%#6A0F1F

Darker −30%#3D0912

Darker −40%#110205

More saturated +25%#DF0027

Less saturated −25%#A7384B

Channel breakdown

R195

G28

B57

Red195 (76.5%)

Green28 (11%)

Blue57 (22.4%)

Hue349.58°

Saturation (HSL)74.89%

Lightness43.73%

Dominant channelRed

Hex per channelR C3 · G 1C · B 39

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Harmonies

Lighter and darker

Similar named colours

Also reads as

C31C39 (chemical formula)

Formula
840.77 g/mol
70 atoms

C31C39 has a molar mass of 840.77 g/mol, made up of 70 atoms across 1 element: 70 × C.

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Molar mass

Molar mass840.77 g/mol

Total atoms per molecule70

Distinct elements1

Mass of one molecule1.3961314 × 10^-21 g

Molecules per gram7.1626494 × 10^20

Name

NameNot in the name tablea name cannot be worked out from a formula alone: isomers share formulas, and naming depends on bonding the formula does not show

Composition by mass

C100%

Carbon (C × 70)840.77 g/mol, 100%

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Elements in this formula

Carbon

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