Recognised as Colour

#C52928

#C52928
Red
Dark
Nearest: Firebrick

#C52928 is a red with RGB values 197, 41, 40 and HSL 0°, 66%, 46%. It is a dark colour, so white text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#C52928#C52928

HEX#C52928

RGBrgb(197, 41, 40)

RGB (0–1)0.7725, 0.1608, 0.1569

RGB percentages77.3%, 16.1%, 15.7%

HSLhsl(0.4, 66.2%, 46.5%)

HSV / HSBhsv(0.4, 79.7%, 77.3%)

CMYK0%, 79.2%, 79.7%, 22.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,921,128

CSS custom property--colour: #C52928;

Brightness & contrast

Relative luminance0.13609WCAG 2.x, 0 is black and 1 is white

Perceived brightness113 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.64:1

Contrast with white5.64:1WCAG normal text: AA

Contrast with black3.72:1WCAG normal text: Fail

Greyscale equivalent#4A4A4A

Inverted#3AD6D7

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5B5226no red cones; affects about 1% of men; ΔE 64.5 from the original

Deuteranopia#817321no green cones; the most common form, about 1% of men; ΔE 64.3 from the original

Tritanopia#D9002Bno blue cones; rare, and affects men and women equally; ΔE 12.1 from the original

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

Contrast with white, large text5.64:1WCAG large text: AAA

Contrast with black, large text3.72:1WCAG large text: AA

Named colours

Firebrick · ΔE 6.4 Crimson · ΔE 13.4 Brown · ΔE 15.2 Dark red · ΔE 17.9 Tomato · ΔE 19.7 Maroon · ΔE 21.7

Nearest named CSS colourFirebrick (#B22222)ΔE 6.44, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#28C4C5

Analogous#C52875, #C57828

Triadic#28C529, #2928C5

Split complementary#28C578, #2875C5

Tetradic#75C528, #28C4C5, #7828C5

Tints, shades & saturation

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

Lighter +40%#F3C6C6

Lighter +30%#EB9C9B

Lighter +20%#E27271

Lighter +10%#DA4746

Darker −10%#9B201F

Darker −20%#701717

Darker −30%#460F0E

Darker −40%#1B0606

More saturated +25%#E30C0A

Less saturated −25%#A74646

Channel breakdown

R197

G41

B40

Red197 (77.3%)

Green41 (16.1%)

Blue40 (15.7%)

Hue0.38°

Saturation (HSL)66.24%

Lightness46.47%

Dominant channelRed

Hex per channelR C5 · G 29 · B 28

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Harmonies

Lighter and darker

Similar named colours

Also reads as

C52928 (chemical formula)

Formula
635,718.208 g/mol
52928 atoms

C52928 has a molar mass of 635,718.208 g/mol, made up of 52928 atoms across 1 element: 52928 × C.

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Molar mass

Molar mass635,718.208 g/mol

Total atoms per molecule52928

Distinct elements1

Mass of one molecule1.0556349 × 10^-18 g

Molecules per gram9.472972 × 10^17

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%

Carbon (C × 52928)635,718.208 g/mol, 100%

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Elements in this formula

Carbon

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