Recognised as Colour

#C10023

#C10023
Red
Dark
Nearest: Firebrick

#C10023 is a red with RGB values 193, 0, 35 and HSL 349°, 100%, 38%. It is a dark colour, so white text on it reaches 6.4:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#C10023#C10023

HEX#C10023

RGBrgb(193, 0, 35)

RGB (0–1)0.7569, 0, 0.1373

RGB percentages75.7%, 0%, 13.7%

HSLhsl(349.1, 100%, 37.8%)

HSV / HSBhsv(349.1, 100%, 75.7%)

CMYK0%, 100%, 81.9%, 24.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,648,483

CSS custom property--colour: #C10023;

Brightness & contrast

Relative luminance0.11459WCAG 2.x, 0 is black and 1 is white

Perceived brightness106.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.38:1

Contrast with white6.38:1WCAG normal text: AA

Contrast with black3.29:1WCAG normal text: Fail

Greyscale equivalent#2C2C2C

Inverted#3EFFDC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4F4722no red cones; affects about 1% of men; ΔE 70.4 from the original

Deuteranopia#796C19no green cones; the most common form, about 1% of men; ΔE 70.4 from the original

Tritanopia#D50015no blue cones; rare, and affects men and women equally; ΔE 13.7 from the original

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

Contrast with white, large text6.38:1WCAG large text: AAA

Contrast with black, large text3.29:1WCAG large text: AA

Named colours

Firebrick · ΔE 9.8 Crimson · ΔE 10.4 Brown · ΔE 18.3 Dark red · ΔE 19.1 Maroon · ΔE 22.9 Tomato · ΔE 24.2

Nearest named CSS colourFirebrick (#B22222)ΔE 9.81, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00C19E

Analogous#C10084, #C13D00

Triadic#23C100, #0023C1

Split complementary#00C13D, #0084C1

Tetradic#84C100, #00C19E, #3D00C1

Tints, shades & saturation

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

Lighter +40%#FF8EA2

Lighter +30%#FF5B79

Lighter +20%#FF284F

Lighter +10%#F4002C

Darker −10%#8E001A

Darker −20%#5B0011

Darker −30%#280007

Darker −40%#000000

More saturated +25%#C10023

Less saturated −25%#A91832

Channel breakdown

R193

B35

Red193 (75.7%)

Green0 (0%)

Blue35 (13.7%)

Hue349.12°

Saturation (HSL)100%

Lightness37.84%

Dominant channelRed

Hex per channelR C1 · G 00 · B 23

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Harmonies

Lighter and darker

Similar named colours

Also reads as

C10023 (chemical formula)

Formula
120,386.253 g/mol
10023 atoms

C10023 has a molar mass of 120,386.253 g/mol, made up of 10023 atoms across 1 element: 10023 × C.

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Molar mass

Molar mass120,386.253 g/mol

Total atoms per molecule10023

Distinct elements1

Mass of one molecule1.9990608 × 10^-19 g

Molecules per gram5.0023492 × 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 × 10023)120,386.253 g/mol, 100%

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Elements in this formula

Carbon

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