Recognised as Colour

#F72C39

#F72C39
Red
Dark
Nearest: Crimson

#F72C39 is a red with RGB values 247, 44, 57 and HSL 356°, 93%, 57%. 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

#F72C39#F72C39

HEX#F72C39

RGBrgb(247, 44, 57)

RGB (0–1)0.9686, 0.1725, 0.2235

RGB percentages96.9%, 17.3%, 22.4%

HSLhsl(356.2, 92.7%, 57.1%)

HSV / HSBhsv(356.2, 82.2%, 96.9%)

CMYK0%, 82.2%, 76.9%, 3.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,198,713

CSS custom property--colour: #F72C39;

Brightness & contrast

Relative luminance0.21871WCAG 2.x, 0 is black and 1 is white

Perceived brightness140.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.37:1

Contrast with white3.91:1WCAG normal text: Fail

Contrast with black5.37:1WCAG normal text: AA

Greyscale equivalent#585858

Inverted#08D3C6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6F6537no red cones; affects about 1% of men; ΔE 79 from the original

Deuteranopia#A19030no green cones; the most common form, about 1% of men; ΔE 78.8 from the original

Tritanopia#FF0034no blue cones; rare, and affects men and women equally; ΔE 7.9 from the original

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

Contrast with white, large text3.91:1WCAG large text: AA

Contrast with black, large text5.37:1WCAG large text: AAA

Named colours

Crimson · ΔE 13.1 Tomato · ΔE 17.8 Red · ΔE 23.7 Firebrick · ΔE 23.9 Orange red · ΔE 25.4 Coral · ΔE 31.2

Nearest named CSS colourCrimson (#DC143C)ΔE 13.09, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2CF7EA

Analogous#F72C9E, #F7852C

Triadic#39F72C, #2C39F7

Split complementary#2CF784, #2C9FF7

Tetradic#9FF72C, #2CF7EA, #852CF7

Tints, shades & saturation

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

Lighter +40%#FEF1F1

Lighter +30%#FDBFC3

Lighter +20%#FB8E95

Lighter +10%#F95D67

Darker −10%#E70917

Darker −20%#B60712

Darker −30%#85050D

Darker −40%#540308

More saturated +25%#FF2432

Less saturated −25%#DC4751

Channel breakdown

R247

G44

B57

Red247 (96.9%)

Green44 (17.3%)

Blue57 (22.4%)

Hue356.16°

Saturation (HSL)92.69%

Lightness57.06%

Dominant channelRed

Hex per channelR F7 · G 2C · B 39

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F72C39 (chemical formula)

Formula
1,836.285 g/mol
111 atoms

F72C39 has a molar mass of 1,836.285 g/mol, made up of 111 atoms across 2 elements: 72 × F, 39 × C.

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Molar mass

Molar mass1,836.285 g/mol

Total atoms per molecule111

Distinct elements2

Mass of one molecule3.049223 × 10^-21 g

Molecules per gram3.279524 × 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

F74.5%

C25.5%

Fluorine (F × 72)1,367.856 g/mol, 74.49%

Carbon (C × 39)468.429 g/mol, 25.51%

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