Recognised as Colour

#CB1C1F

#CB1C1F
Red
Dark
Nearest: Firebrick

#CB1C1F is a red with RGB values 203, 28, 31 and HSL 359°, 76%, 45%. 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

#CB1C1F#CB1C1F

HEX#CB1C1F

RGBrgb(203, 28, 31)

RGB (0–1)0.7961, 0.1098, 0.1216

RGB percentages79.6%, 11%, 12.2%

HSLhsl(359, 75.8%, 45.3%)

HSV / HSBhsv(359, 86.2%, 79.6%)

CMYK0%, 86.2%, 84.7%, 20.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,311,007

CSS custom property--colour: #CB1C1F;

Brightness & contrast

Relative luminance0.13626WCAG 2.x, 0 is black and 1 is white

Perceived brightness113.5 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 black3.73:1WCAG normal text: Fail

Greyscale equivalent#414141

Inverted#34E3E0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#594F1Cno red cones; affects about 1% of men; ΔE 69.4 from the original

Deuteranopia#837413no green cones; the most common form, about 1% of men; ΔE 69.1 from the original

Tritanopia#E00021no blue cones; rare, and affects men and women equally; ΔE 9.9 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 text3.73:1WCAG large text: AA

Named colours

Firebrick · ΔE 12.3 Crimson · ΔE 13.9 Tomato · ΔE 19.6 Dark red · ΔE 20.9 Brown · ΔE 21.7 Maroon · ΔE 25.4

Nearest named CSS colourFirebrick (#B22222)ΔE 12.28, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1CCBC8

Analogous#CB1C77, #CB711C

Triadic#1FCB1C, #1C1FCB

Split complementary#1CCB71, #1C77CB

Tetradic#76CB1C, #1CCBC8, #701CCB

Tints, shades & saturation

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

Lighter +40%#F6BDBE

Lighter +30%#F09092

Lighter +20%#EA6366

Lighter +10%#E3373A

Darker −10%#9E1618

Darker −20%#711011

Darker −30%#45090A

Darker −40%#180304

More saturated +25%#E70004

Less saturated −25%#AE393B

Channel breakdown

R203

G28

B31

Red203 (79.6%)

Green28 (11%)

Blue31 (12.2%)

Hue358.97°

Saturation (HSL)75.76%

Lightness45.29%

Dominant channelRed

Hex per channelR CB · G 1C · B 1F

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Harmonies

Lighter and darker

Similar named colours

Also reads as

CB1C1F (chemical formula)

Formula
53.83 g/mol
4 atoms

CB1C1F has a molar mass of 53.83 g/mol, made up of 4 atoms across 3 elements: 2 × C, 1 × B, 1 × F.

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Molar mass

Molar mass53.83 g/mol

Total atoms per molecule4

Distinct elements3

Mass of one molecule8.9386818 × 10^-23 g

Molecules per gram1.1187332 × 10^22

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

C44.6%

B20.1%

F35.3%

Carbon (C × 2)24.022 g/mol, 44.626%

Boron (B)10.81 g/mol, 20.082%

Fluorine (F)18.998 g/mol, 35.293%

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