Recognised as Colour

#CB556B

#CB556B
Red
Dark
Nearest: Indian red

#CB556B is a red with RGB values 203, 85, 107 and HSL 349°, 53%, 56%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Indian red.

Colour values

#CB556B#CB556B

HEX#CB556B

RGBrgb(203, 85, 107)

RGB (0–1)0.7961, 0.3333, 0.4196

RGB percentages79.6%, 33.3%, 42%

HSLhsl(348.8, 53.2%, 56.5%)

HSV / HSBhsv(348.8, 58.1%, 79.6%)

CMYK0%, 58.1%, 47.3%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,325,675

CSS custom property--colour: #CB556B;

Brightness & contrast

Relative luminance0.20255WCAG 2.x, 0 is black and 1 is white

Perceived brightness133.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.05:1

Contrast with white4.16:1WCAG normal text: Fail

Contrast with black5.05:1WCAG normal text: AA

Greyscale equivalent#707070

Inverted#34AA94

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6E6D6Bno red cones; affects about 1% of men; ΔE 50.2 from the original

Deuteranopia#8C8568no green cones; the most common form, about 1% of men; ΔE 51.4 from the original

Tritanopia#DC455Dno blue cones; rare, and affects men and women equally; ΔE 14.2 from the original

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

Contrast with white, large text4.16:1WCAG large text: AA

Contrast with black, large text5.05:1WCAG large text: AAA

Named colours

Indian red · ΔE 11.4 Pale violetred · ΔE 14.3 Light coral · ΔE 17.3 Salmon · ΔE 23.5 Brown · ΔE 24 Firebrick · ΔE 30.1

Nearest named CSS colourIndian red (#CD5C5C)ΔE 11.43, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#55CBB5

Analogous#CB55A6, #CB7A55

Triadic#6BCB55, #556BCB

Split complementary#55CB7A, #55A6CB

Tetradic#A6CB55, #55CBB5, #7A55CB

Tints, shades & saturation

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

Lighter +40%#FBF1F3

Lighter +30%#EFCAD1

Lighter +20%#E3A3AF

Lighter +10%#D77C8D

Darker −10%#B5384F

Darker −20%#8E2C3E

Darker −30%#67202D

Darker −40%#40141C

More saturated +25%#E7395A

Less saturated −25%#AF717C

Channel breakdown

R203

G85

B107

Red203 (79.6%)

Green85 (33.3%)

Blue107 (42%)

Hue348.81°

Saturation (HSL)53.15%

Lightness56.47%

Dominant channelRed

Hex per channelR CB · G 55 · B 6B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

CB556B (chemical formula)

Formula
6,033.181 g/mol
558 atoms

CB556B has a molar mass of 6,033.181 g/mol, made up of 558 atoms across 2 elements: 1 × C, 557 × B.

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Molar mass

Molar mass6,033.181 g/mol

Total atoms per molecule558

Distinct elements2

Mass of one molecule1.0018333 × 10^-20 g

Molecules per gram9.9817008 × 10^19

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, 0.199%

Boron (B × 557)6,021.17 g/mol, 99.801%

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Elements in this formula

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