Recognised as Colour

#FC2B1F

#FC2B1F
Red
Dark
Nearest: Red

#FC2B1F is a red with RGB values 252, 43, 31 and HSL 3°, 97%, 55%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FC2B1F#FC2B1F

HEX#FC2B1F

RGBrgb(252, 43, 31)

RGB (0–1)0.9882, 0.1686, 0.1216

RGB percentages98.8%, 16.9%, 12.2%

HSLhsl(3.3, 97.4%, 55.5%)

HSV / HSBhsv(3.3, 87.7%, 98.8%)

CMYK0%, 82.9%, 87.7%, 1.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,526,111

CSS custom property--colour: #FC2B1F;

Brightness & contrast

Relative luminance0.22522WCAG 2.x, 0 is black and 1 is white

Perceived brightness142.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.5:1

Contrast with white3.82:1WCAG normal text: Fail

Contrast with black5.5:1WCAG normal text: AA

Greyscale equivalent#575757

Inverted#03D4E0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#736619no red cones; affects about 1% of men; ΔE 80.6 from the original

Deuteranopia#A59209no green cones; the most common form, about 1% of men; ΔE 80.1 from the original

Tritanopia#FF002Cno blue cones; rare, and affects men and women equally; ΔE 9.3 from the original

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

Contrast with white, large text3.82:1WCAG large text: AA

Contrast with black, large text5.5:1WCAG large text: AAA

Named colours

Red · ΔE 10.7 Orange red · ΔE 12.9 Tomato · ΔE 21.7 Crimson · ΔE 26 Firebrick · ΔE 31.7 Coral · ΔE 33.4

Nearest named CSS colourRed (#FF0000)ΔE 10.7, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1FF0FC

Analogous#FC1F82, #FC991F

Triadic#1FFC2B, #2B1FFC

Split complementary#1FFC9A, #1F81FC

Tetradic#82FC1F, #1FF0FC, #9A1FFC

Tints, shades & saturation

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

Lighter +40%#FFEAE8

Lighter +30%#FEBAB6

Lighter +20%#FD8A84

Lighter +10%#FD5B51

Darker −10%#E50F03

Darker −20%#B30C02

Darker −30%#800902

Darker −40%#4E0501

More saturated +25%#FF281C

Less saturated −25%#E0443B

Channel breakdown

R252

G43

B31

Red252 (98.8%)

Green43 (16.9%)

Blue31 (12.2%)

Hue3.26°

Saturation (HSL)97.36%

Lightness55.49%

Dominant channelRed

Hex per channelR FC · G 2B · B 1F

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FC2B1F (chemical formula)

Formula
72.828 g/mol
5 atoms

FC2B1F has a molar mass of 72.828 g/mol, made up of 5 atoms across 3 elements: 2 × F, 2 × C, 1 × B.

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Molar mass

Molar mass72.828 g/mol

Total atoms per molecule5

Distinct elements3

Mass of one molecule1.2093374 × 10^-22 g

Molecules per gram8.268991 × 10^21

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

F52.2%

C33%

B14.8%

Fluorine (F × 2)37.996 g/mol, 52.172%

Carbon (C × 2)24.022 g/mol, 32.985%

Boron (B)10.81 g/mol, 14.843%

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