Recognised as Colour

#FC4B2B

#FC4B2B
Red
Dark
Nearest: Tomato

#FC4B2B is a red with RGB values 252, 75, 43 and HSL 9°, 97%, 58%. It is a dark colour, so black text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#FC4B2B#FC4B2B

HEX#FC4B2B

RGBrgb(252, 75, 43)

RGB (0–1)0.9882, 0.2941, 0.1686

RGB percentages98.8%, 29.4%, 16.9%

HSLhsl(9.2, 97.2%, 57.8%)

HSV / HSBhsv(9.2, 82.9%, 98.8%)

CMYK0%, 70.2%, 82.9%, 1.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,534,315

CSS custom property--colour: #FC4B2B;

Brightness & contrast

Relative luminance0.25902WCAG 2.x, 0 is black and 1 is white

Perceived brightness150 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.18:1

Contrast with white3.4:1WCAG normal text: Fail

Contrast with black6.18:1WCAG normal text: AA

Greyscale equivalent#6E6E6E

Inverted#03B4D4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#807225no red cones; affects about 1% of men; ΔE 71.2 from the original

Deuteranopia#AC9A21no green cones; the most common form, about 1% of men; ΔE 71.7 from the original

Tritanopia#FF0046no blue cones; rare, and affects men and women equally; ΔE 24.8 from the original

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

Contrast with white, large text3.4:1WCAG large text: AA

Contrast with black, large text6.18:1WCAG large text: AAA

Named colours

Tomato · ΔE 12.8 Orange red · ΔE 13.4 Red · ΔE 19.2 Coral · ΔE 23.6 Crimson · ΔE 25.4 Firebrick · ΔE 27.8

Nearest named CSS colourTomato (#FF6347)ΔE 12.77, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2BDCFC

Analogous#FC2B74, #FCB32B

Triadic#2BFC4B, #4B2BFC

Split complementary#2BFCB4, #2B73FC

Tetradic#73FC2B, #2BDCFC, #B42BFC

Tints, shades & saturation

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

Lighter +40%#FFF6F4

Lighter +30%#FECBC2

Lighter +20%#FDA090

Lighter +10%#FD765D

Darker −10%#F12803

Darker −20%#BE1F03

Darker −30%#8C1702

Darker −40%#5A0F01

More saturated +25%#FF4928

Less saturated −25%#E15E46

Channel breakdown

R252

G75

B43

Red252 (98.8%)

Green75 (29.4%)

Blue43 (16.9%)

Hue9.19°

Saturation (HSL)97.21%

Lightness57.84%

Dominant channelRed

Hex per channelR FC · G 4B · B 2B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FC4B2B (chemical formula)

Formula
99.472 g/mol
8 atoms

FC4B2B has a molar mass of 99.472 g/mol, made up of 8 atoms across 3 elements: 1 × F, 4 × C, 3 × B.

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Molar mass

Molar mass99.472 g/mol

Total atoms per molecule8

Distinct elements3

Mass of one molecule1.6517714 × 10^-22 g

Molecules per gram6.0541064 × 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

F19.1%

C48.3%

B32.6%

Fluorine (F)18.998 g/mol, 19.099%

Carbon (C × 4)48.044 g/mol, 48.299%

Boron (B × 3)32.43 g/mol, 32.602%

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