Recognised as Colour

#C73311

#C73311
Red
Dark
Nearest: Firebrick

#C73311 is a red with RGB values 199, 51, 17 and HSL 11°, 84%, 42%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#C73311#C73311

HEX#C73311

RGBrgb(199, 51, 17)

RGB (0–1)0.7804, 0.2, 0.0667

RGB percentages78%, 20%, 6.7%

HSLhsl(11.2, 84.3%, 42.4%)

HSV / HSBhsv(11.2, 91.5%, 78%)

CMYK0%, 74.4%, 91.5%, 22%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,054,737

CSS custom property--colour: #C73311;

Brightness & contrast

Relative luminance0.1455WCAG 2.x, 0 is black and 1 is white

Perceived brightness115.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.37:1

Contrast with white5.37:1WCAG normal text: AA

Contrast with black3.91:1WCAG normal text: Fail

Greyscale equivalent#505050

Inverted#38CCEE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#615607no red cones; affects about 1% of men; ΔE 62.2 from the original

Deuteranopia#867600no green cones; the most common form, about 1% of men; ΔE 61.5 from the original

Tritanopia#DC002Eno blue cones; rare, and affects men and women equally; ΔE 19.4 from the original

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

Contrast with white, large text5.37:1WCAG large text: AAA

Contrast with black, large text3.91:1WCAG large text: AA

Named colours

Firebrick · ΔE 15.7 Tomato · ΔE 18.2 Dark red · ΔE 20.9 Chocolate · ΔE 22.9 Crimson · ΔE 23.5 Orange red · ΔE 23.7

Nearest named CSS colourFirebrick (#B22222)ΔE 15.68, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#11A5C7

Analogous#C7114A, #C78E11

Triadic#11C733, #3311C7

Split complementary#11C78E, #114AC7

Tetradic#4AC711, #11A5C7, #8E11C7

Tints, shades & saturation

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

Lighter +40%#F8BAAC

Lighter +30%#F4937D

Lighter +20%#F06C4E

Lighter +10%#EC451F

Darker −10%#98270D

Darker −20%#691B09

Darker −30%#3A0F05

Darker −40%#0B0301

More saturated +25%#D82800

Less saturated −25%#AC442C

Channel breakdown

R199

G51

B17

Red199 (78%)

Green51 (20%)

Blue17 (6.7%)

Hue11.21°

Saturation (HSL)84.26%

Lightness42.35%

Dominant channelRed

Hex per channelR C7 · G 33 · B 11

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Harmonies

Lighter and darker

Similar named colours

Also reads as

C73311 (chemical formula)

Formula
880,538.421 g/mol
73311 atoms

C73311 has a molar mass of 880,538.421 g/mol, made up of 73311 atoms across 1 element: 73311 × C.

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Molar mass

Molar mass880,538.421 g/mol

Total atoms per molecule73311

Distinct elements1

Mass of one molecule1.4621684 × 10^-18 g

Molecules per gram6.8391573 × 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 × 73311)880,538.421 g/mol, 100%

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Elements in this formula

Carbon

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