Recognised as Colour

#C5545B

#C5545B
Red
Dark
Nearest: Indian red

#C5545B is a red with RGB values 197, 84, 91 and HSL 356°, 49%, 55%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Indian red.

Colour values

#C5545B#C5545B

HEX#C5545B

RGBrgb(197, 84, 91)

RGB (0–1)0.7725, 0.3294, 0.3569

RGB percentages77.3%, 32.9%, 35.7%

HSLhsl(356.3, 49.3%, 55.1%)

HSV / HSBhsv(356.3, 57.4%, 77.3%)

CMYK0%, 57.4%, 53.8%, 22.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,932,187

CSS custom property--colour: #C5545B;

Brightness & contrast

Relative luminance0.18966WCAG 2.x, 0 is black and 1 is white

Perceived brightness129.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.79:1

Contrast with white4.38:1WCAG normal text: Fail

Contrast with black4.79:1WCAG normal text: AA

Greyscale equivalent#6D6D6D

Inverted#3AABA4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6E6A5Bno red cones; affects about 1% of men; ΔE 48.4 from the original

Deuteranopia#8B8158no green cones; the most common form, about 1% of men; ΔE 48.8 from the original

Tritanopia#D64257no 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 text4.38:1WCAG large text: AA

Contrast with black, large text4.79:1WCAG large text: AAA

Named colours

Indian red · ΔE 4.4 Light coral · ΔE 15.8 Brown · ΔE 18 Salmon · ΔE 19.5 Pale violetred · ΔE 20.9 Firebrick · ΔE 24.3

Nearest named CSS colourIndian red (#CD5C5C)ΔE 4.39, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#54C5BE

Analogous#C55493, #C58654

Triadic#5BC554, #545BC5

Split complementary#54C586, #5493C5

Tetradic#94C554, #54C5BE, #8654C5

Tints, shades & saturation

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

Lighter +40%#F9ECED

Lighter +30%#ECC6C9

Lighter +20%#DFA0A4

Lighter +10%#D27A80

Darker −10%#AC3A41

Darker −20%#862D33

Darker −30%#602024

Darker −40%#391416

More saturated +25%#E23742

Less saturated −25%#A87174

Channel breakdown

R197

G84

B91

Red197 (77.3%)

Green84 (32.9%)

Blue91 (35.7%)

Hue356.28°

Saturation (HSL)49.34%

Lightness55.1%

Dominant channelRed

Hex per channelR C5 · G 54 · B 5B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

C5545B (chemical formula)

Formula
66,611.805 g/mol
5546 atoms

C5545B has a molar mass of 66,611.805 g/mol, made up of 5546 atoms across 2 elements: 5545 × C, 1 × B.

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Molar mass

Molar mass66,611.805 g/mol

Total atoms per molecule5546

Distinct elements2

Mass of one molecule1.106115 × 10^-19 g

Molecules per gram9.0406509 × 10^18

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%

B0%

Carbon (C × 5545)66,600.995 g/mol, 99.984%

Boron (B)10.81 g/mol, 0.016%

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