Recognised as Colour

#C10911

#C10911
Red
Dark
Nearest: Firebrick

#C10911 is a red with RGB values 193, 9, 17 and HSL 357°, 91%, 40%. It is a dark colour, so white text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#C10911#C10911

HEX#C10911

RGBrgb(193, 9, 17)

RGB (0–1)0.7569, 0.0353, 0.0667

RGB percentages75.7%, 3.5%, 6.7%

HSLhsl(357.4, 91.1%, 39.6%)

HSV / HSBhsv(357.4, 95.3%, 75.7%)

CMYK0%, 95.3%, 91.2%, 24.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,650,769

CSS custom property--colour: #C10911;

Brightness & contrast

Relative luminance0.11573WCAG 2.x, 0 is black and 1 is white

Perceived brightness105.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.34:1

Contrast with white6.34:1WCAG normal text: AA

Contrast with black3.31:1WCAG normal text: Fail

Greyscale equivalent#313131

Inverted#3EF6EE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#51470Cno red cones; affects about 1% of men; ΔE 69.4 from the original

Deuteranopia#7B6D00no green cones; the most common form, about 1% of men; ΔE 69.3 from the original

Tritanopia#D50012no blue cones; rare, and affects men and women equally; ΔE 8.3 from the original

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

Contrast with white, large text6.34:1WCAG large text: AAA

Contrast with black, large text3.31:1WCAG large text: AA

Named colours

Firebrick · ΔE 13.7 Crimson · ΔE 17.6 Dark red · ΔE 19.5 Tomato · ΔE 22.7 Brown · ΔE 23.3 Maroon · ΔE 24.4

Nearest named CSS colourFirebrick (#B22222)ΔE 13.75, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#09C1B9

Analogous#C1096D, #C15D09

Triadic#11C109, #0911C1

Split complementary#09C15D, #096DC1

Tetradic#6DC109, #09C1B9, #5D09C1

Tints, shades & saturation

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

Lighter +40%#FA9CA0

Lighter +30%#F86B71

Lighter +20%#F63A42

Lighter +10%#F20B15

Darker −10%#90070D

Darker −20%#600408

Darker −30%#2F0204

Darker −40%#000000

More saturated +25%#CA0009

Less saturated −25%#A82228

Channel breakdown

R193

B17

Red193 (75.7%)

Green9 (3.5%)

Blue17 (6.7%)

Hue357.39°

Saturation (HSL)91.09%

Lightness39.61%

Dominant channelRed

Hex per channelR C1 · G 09 · B 11

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Harmonies

Lighter and darker

Similar named colours

Also reads as

C10911 (chemical formula)

Formula
131,052.021 g/mol
10911 atoms

C10911 has a molar mass of 131,052.021 g/mol, made up of 10911 atoms across 1 element: 10911 × C.

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Molar mass

Molar mass131,052.021 g/mol

Total atoms per molecule10911

Distinct elements1

Mass of one molecule2.17617 × 10^-19 g

Molecules per gram4.5952292 × 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%

Carbon (C × 10911)131,052.021 g/mol, 100%

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Elements in this formula

Carbon

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