Recognised as Colour

#CD183C

#CD183C
Red
Dark
Nearest: Crimson

#CD183C is a red with RGB values 205, 24, 60 and HSL 348°, 79%, 45%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#CD183C#CD183C

HEX#CD183C

RGBrgb(205, 24, 60)

RGB (0–1)0.8039, 0.0941, 0.2353

RGB percentages80.4%, 9.4%, 23.5%

HSLhsl(348.1, 79%, 44.9%)

HSV / HSBhsv(348.1, 88.3%, 80.4%)

CMYK0%, 88.3%, 70.7%, 19.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,441,084

CSS custom property--colour: #CD183C;

Brightness & contrast

Relative luminance0.13959WCAG 2.x, 0 is black and 1 is white

Perceived brightness115.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.54:1

Contrast with white5.54:1WCAG normal text: AA

Contrast with black3.79:1WCAG normal text: Fail

Greyscale equivalent#414141

Inverted#32E7C3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#56513Cno red cones; affects about 1% of men; ΔE 70.9 from the original

Deuteranopia#827536no green cones; the most common form, about 1% of men; ΔE 70.5 from the original

Tritanopia#E2002Ano blue cones; rare, and affects men and women equally; ΔE 17.2 from the original

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

Contrast with white, large text5.54:1WCAG large text: AAA

Contrast with black, large text3.79:1WCAG large text: AA

Named colours

Crimson · ΔE 6.7 Firebrick · ΔE 14.3 Brown · ΔE 18.1 Indian red · ΔE 24.7 Dark red · ΔE 25.3 Tomato · ΔE 26.2

Nearest named CSS colourCrimson (#DC143C)ΔE 6.69, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#18CDA9

Analogous#CD1897, #CD4E18

Triadic#3CCD18, #183CCD

Split complementary#18CD4E, #1897CD

Tetradic#97CD18, #18CDA9, #4E18CD

Tints, shades & saturation

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

Lighter +40%#F7BAC6

Lighter +30%#F28CA1

Lighter +20%#EC5F7B

Lighter +10%#E73155

Darker −10%#9F132F

Darker −20%#720D21

Darker −30%#440814

Darker −40%#160307

More saturated +25%#E5002E

Less saturated −25%#B0354D

Channel breakdown

R205

G24

B60

Red205 (80.4%)

Green24 (9.4%)

Blue60 (23.5%)

Hue348.07°

Saturation (HSL)79.04%

Lightness44.9%

Dominant channelRed

Hex per channelR CD · G 18 · B 3C

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Cd183C (chemical formula)

Formula
20,583.041 g/mol
184 atoms

Cd183C has a molar mass of 20,583.041 g/mol, made up of 184 atoms across 2 elements: 183 × Cd, 1 × C.

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Molar mass

Molar mass20,583.041 g/mol

Total atoms per molecule184

Distinct elements2

Mass of one molecule3.4178944 × 10^-20 g

Molecules per gram2.925778 × 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

Cd99.9%

C0.1%

Cadmium (Cd × 183)20,571.03 g/mol, 99.942%

Carbon (C)12.011 g/mol, 0.058%

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