Recognised as Colour

#CB2B36

#CB2B36
Red
Dark
Nearest: Firebrick

#CB2B36 is a red with RGB values 203, 43, 54 and HSL 356°, 65%, 48%. It is a dark colour, so white text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CB2B36#CB2B36

HEX#CB2B36

RGBrgb(203, 43, 54)

RGB (0–1)0.7961, 0.1686, 0.2118

RGB percentages79.6%, 16.9%, 21.2%

HSLhsl(355.9, 65%, 48.2%)

HSV / HSBhsv(355.9, 78.8%, 79.6%)

CMYK0%, 78.8%, 73.4%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,314,870

CSS custom property--colour: #CB2B36;

Brightness & contrast

Relative luminance0.14691WCAG 2.x, 0 is black and 1 is white

Perceived brightness117.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.33:1

Contrast with white5.33:1WCAG normal text: AA

Contrast with black3.94:1WCAG normal text: Fail

Greyscale equivalent#4E4E4E

Inverted#34D4C9

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5D5535no red cones; affects about 1% of men; ΔE 65.6 from the original

Deuteranopia#847730no green cones; the most common form, about 1% of men; ΔE 66 from the original

Tritanopia#DF0031no blue cones; rare, and affects men and women equally; ΔE 13.3 from the original

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

Contrast with white, large text5.33:1WCAG large text: AAA

Contrast with black, large text3.94:1WCAG large text: AA

Named colours

Firebrick · ΔE 8.9 Crimson · ΔE 9.7 Brown · ΔE 14.5 Tomato · ΔE 21.2 Dark red · ΔE 21.3 Indian red · ΔE 22.1

Nearest named CSS colourFirebrick (#B22222)ΔE 8.9, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2BCBC0

Analogous#CB2B86, #CB702B

Triadic#36CB2B, #2B36CB

Split complementary#2BCB70, #2B86CB

Tetradic#86CB2B, #2BCBC0, #702BCB

Tints, shades & saturation

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

Lighter +40%#F5CDD0

Lighter +30%#ECA3A8

Lighter +20%#E37981

Lighter +10%#DA4F59

Darker −10%#A1222B

Darker −20%#771920

Darker −30%#4D1014

Darker −40%#230709

More saturated +25%#EA0C1B

Less saturated −25%#AC4A51

Channel breakdown

R203

G43

B54

Red203 (79.6%)

Green43 (16.9%)

Blue54 (21.2%)

Hue355.88°

Saturation (HSL)65.04%

Lightness48.24%

Dominant channelRed

Hex per channelR CB · G 2B · B 36

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Harmonies

Lighter and darker

Similar named colours

Also reads as

CB2B36 (chemical formula)

Formula
422.791 g/mol
39 atoms

CB2B36 has a molar mass of 422.791 g/mol, made up of 39 atoms across 2 elements: 1 × C, 38 × B.

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Molar mass

Molar mass422.791 g/mol

Total atoms per molecule39

Distinct elements2

Mass of one molecule7.0206097 × 10^-22 g

Molecules per gram1.4243777 × 10^21

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

C2.8%

B97.2%

Carbon (C)12.011 g/mol, 2.841%

Boron (B × 38)410.78 g/mol, 97.159%

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