Recognised as Colour

#CB4B54

#CB4B54
Red
Dark
Nearest: Indian red

#CB4B54 is a red with RGB values 203, 75, 84 and HSL 356°, 55%, 55%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Indian red.

Colour values

#CB4B54#CB4B54

HEX#CB4B54

RGBrgb(203, 75, 84)

RGB (0–1)0.7961, 0.2941, 0.3294

RGB percentages79.6%, 29.4%, 32.9%

HSLhsl(355.8, 55.2%, 54.5%)

HSV / HSBhsv(355.8, 63.1%, 79.6%)

CMYK0%, 63.1%, 58.6%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,323,092

CSS custom property--colour: #CB4B54;

Brightness & contrast

Relative luminance0.18369WCAG 2.x, 0 is black and 1 is white

Perceived brightness128.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.67:1

Contrast with white4.49:1WCAG normal text: Fail

Contrast with black4.67:1WCAG normal text: AA

Greyscale equivalent#676767

Inverted#34B4AB

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6B6653no red cones; affects about 1% of men; ΔE 54.4 from the original

Deuteranopia#8B8151no green cones; the most common form, about 1% of men; ΔE 55.3 from the original

Tritanopia#DE324Fno blue cones; rare, and affects men and women equally; ΔE 15.1 from the original

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

Contrast with white, large text4.49:1WCAG large text: AA

Contrast with black, large text4.67:1WCAG large text: AAA

Named colours

Indian red · ΔE 7.4 Brown · ΔE 15 Light coral · ΔE 18.5 Firebrick · ΔE 19.4 Salmon · ΔE 19.6 Crimson · ΔE 22.8

Nearest named CSS colourIndian red (#CD5C5C)ΔE 7.41, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#4BCBC2

Analogous#CB4B94, #CB824B

Triadic#54CB4B, #4B54CB

Split complementary#4BCB82, #4B94CB

Tetradic#94CB4B, #4BCBC2, #824BCB

Tints, shades & saturation

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

Lighter +40%#F9E9EA

Lighter +30%#EDC2C5

Lighter +20%#E29A9F

Lighter +10%#D6737A

Darker −10%#B0333C

Darker −20%#89272E

Darker −30%#611C21

Darker −40%#391113

More saturated +25%#E82E3B

Less saturated −25%#AE686D

Channel breakdown

R203

G75

B84

Red203 (79.6%)

Green75 (29.4%)

Blue84 (32.9%)

Hue355.78°

Saturation (HSL)55.17%

Lightness54.51%

Dominant channelRed

Hex per channelR CB · G 4B · B 54

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Harmonies

Lighter and darker

Similar named colours

Also reads as

CB4B54 (chemical formula)

Formula
638.991 g/mol
59 atoms

CB4B54 has a molar mass of 638.991 g/mol, made up of 59 atoms across 2 elements: 1 × C, 58 × B.

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Molar mass

Molar mass638.991 g/mol

Total atoms per molecule59

Distinct elements2

Mass of one molecule1.0610695 × 10^-21 g

Molecules per gram9.4244532 × 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

C1.9%

B98.1%

Carbon (C)12.011 g/mol, 1.88%

Boron (B × 58)626.98 g/mol, 98.12%

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