Recognised as Colour

#CB452B

#CB452B
Red
Dark
Nearest: Firebrick

#CB452B is a red with RGB values 203, 69, 43 and HSL 10°, 65%, 48%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CB452B#CB452B

HEX#CB452B

RGBrgb(203, 69, 43)

RGB (0–1)0.7961, 0.2706, 0.1686

RGB percentages79.6%, 27.1%, 16.9%

HSLhsl(9.7, 65%, 48.2%)

HSV / HSBhsv(9.7, 78.8%, 79.6%)

CMYK0%, 66%, 78.8%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,321,515

CSS custom property--colour: #CB452B;

Brightness & contrast

Relative luminance0.17127WCAG 2.x, 0 is black and 1 is white

Perceived brightness123.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.75:1

Contrast with white4.75:1WCAG normal text: AA

Contrast with black4.43:1WCAG normal text: Fail

Greyscale equivalent#606060

Inverted#34BAD4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6C6027no red cones; affects about 1% of men; ΔE 56.1 from the original

Deuteranopia#8D7E25no green cones; the most common form, about 1% of men; ΔE 56.7 from the original

Tritanopia#DF1D40no blue cones; rare, and affects men and women equally; ΔE 21.7 from the original

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

Contrast with white, large text4.75:1WCAG large text: AAA

Contrast with black, large text4.43:1WCAG large text: AA

Named colours

Firebrick · ΔE 11.9 Tomato · ΔE 15.3 Brown · ΔE 17.2 Coral · ΔE 20.3 Dark red · ΔE 20.5 Chocolate · ΔE 21.1

Nearest named CSS colourFirebrick (#B22222)ΔE 11.86, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2BB1CB

Analogous#CB2B61, #CB952B

Triadic#2BCB45, #452BCB

Split complementary#2BCB95, #2B61CB

Tetradic#61CB2B, #2BB1CB, #952BCB

Tints, shades & saturation

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

Lighter +40%#F5D4CD

Lighter +30%#ECAFA3

Lighter +20%#E38A79

Lighter +10%#DA664F

Darker −10%#A13722

Darker −20%#772819

Darker −30%#4D1A10

Darker −40%#230C07

More saturated +25%#EA300C

Less saturated −25%#AC5A4A

Channel breakdown

R203

G69

B43

Red203 (79.6%)

Green69 (27.1%)

Blue43 (16.9%)

Hue9.75°

Saturation (HSL)65.04%

Lightness48.24%

Dominant channelRed

Hex per channelR CB · G 45 · B 2B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

CB452B (chemical formula)

Formula
4,908.941 g/mol
454 atoms

CB452B has a molar mass of 4,908.941 g/mol, made up of 454 atoms across 2 elements: 1 × C, 453 × B.

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Molar mass

Molar mass4,908.941 g/mol

Total atoms per molecule454

Distinct elements2

Mass of one molecule8.1514883 × 10^-21 g

Molecules per gram1.2267698 × 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

C0.2%

B99.8%

Carbon (C)12.011 g/mol, 0.245%

Boron (B × 453)4,896.93 g/mol, 99.755%

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