Recognised as Colour

#FC233B

#FC233B
Red
Dark
Nearest: Crimson

#FC233B is a red with RGB values 252, 35, 59 and HSL 353°, 97%, 56%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FC233B#FC233B

HEX#FC233B

RGBrgb(252, 35, 59)

RGB (0–1)0.9882, 0.1373, 0.2314

RGB percentages98.8%, 13.7%, 23.1%

HSLhsl(353.4, 97.3%, 56.3%)

HSV / HSBhsv(353.4, 86.1%, 98.8%)

CMYK0%, 86.1%, 76.6%, 1.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,524,091

CSS custom property--colour: #FC233B;

Brightness & contrast

Relative luminance0.22213WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.44:1

Contrast with white3.86:1WCAG normal text: Fail

Contrast with black5.44:1WCAG normal text: AA

Greyscale equivalent#535353

Inverted#03DCC4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6E6539no red cones; affects about 1% of men; ΔE 82.6 from the original

Deuteranopia#A29232no green cones; the most common form, about 1% of men; ΔE 82.5 from the original

Tritanopia#FF0030no blue cones; rare, and affects men and women equally; ΔE 6.8 from the original

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

Contrast with white, large text3.86:1WCAG large text: AA

Contrast with black, large text5.44:1WCAG large text: AAA

Named colours

Crimson · ΔE 13.9 Tomato · ΔE 20.5 Red · ΔE 23.5 Firebrick · ΔE 26.4 Orange red · ΔE 26.6 Coral · ΔE 34

Nearest named CSS colourCrimson (#DC143C)ΔE 13.9, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#23FCE4

Analogous#FC23A8, #FC7823

Triadic#3BFC23, #233BFC

Split complementary#23FC78, #23A8FC

Tetradic#A7FC23, #23FCE4, #7723FC

Tints, shades & saturation

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

Lighter +40%#FFECEE

Lighter +30%#FEBAC1

Lighter +20%#FD8895

Lighter +10%#FD5568

Darker −10%#E9031D

Darker −20%#B70216

Darker −30%#840210

Darker −40%#52010A

More saturated +25%#FF2039

Less saturated −25%#E03F51

Channel breakdown

R252

G35

B59

Red252 (98.8%)

Green35 (13.7%)

Blue59 (23.1%)

Hue353.36°

Saturation (HSL)97.31%

Lightness56.27%

Dominant channelRed

Hex per channelR FC · G 23 · B 3B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FC233B (chemical formula)

Formula
2,828.371 g/mol
235 atoms

FC233B has a molar mass of 2,828.371 g/mol, made up of 235 atoms across 3 elements: 1 × F, 233 × C, 1 × B.

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Molar mass

Molar mass2,828.371 g/mol

Total atoms per molecule235

Distinct elements3

Mass of one molecule4.6966205 × 10^-21 g

Molecules per gram2.1291905 × 10^20

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

F0.7%

C98.9%

B0.4%

Fluorine (F)18.998 g/mol, 0.672%

Carbon (C × 233)2,798.563 g/mol, 98.946%

Boron (B)10.81 g/mol, 0.382%

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