Recognised as Colour

#F74337

#F74337
Red
Dark
Nearest: Tomato

#F74337 is a red with RGB values 247, 67, 55 and HSL 4°, 92%, 59%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#F74337#F74337

HEX#F74337

RGBrgb(247, 67, 55)

RGB (0–1)0.9686, 0.2627, 0.2157

RGB percentages96.9%, 26.3%, 21.6%

HSLhsl(3.8, 92.3%, 59.2%)

HSV / HSBhsv(3.8, 77.7%, 96.9%)

CMYK0%, 72.9%, 77.7%, 3.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,204,599

CSS custom property--colour: #F74337;

Brightness & contrast

Relative luminance0.24064WCAG 2.x, 0 is black and 1 is white

Perceived brightness145.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.81:1

Contrast with white3.61:1WCAG normal text: Fail

Contrast with black5.81:1WCAG normal text: AA

Greyscale equivalent#686868

Inverted#08BCC8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#796E34no red cones; affects about 1% of men; ΔE 72.9 from the original

Deuteranopia#A6952Fno green cones; the most common form, about 1% of men; ΔE 72.7 from the original

Tritanopia#FF0042no blue cones; rare, and affects men and women equally; ΔE 16.7 from the original

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

Contrast with white, large text3.61:1WCAG large text: AA

Contrast with black, large text5.81:1WCAG large text: AAA

Named colours

Tomato · ΔE 11 Crimson · ΔE 17.4 Orange red · ΔE 21.1 Firebrick · ΔE 22.7 Red · ΔE 23.5 Coral · ΔE 24.3

Nearest named CSS colourTomato (#FF6347)ΔE 11.02, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#37EBF7

Analogous#F7378B, #F7A337

Triadic#37F743, #4337F7

Split complementary#37F7A3, #378BF7

Tetradic#8BF737, #37EBF7, #A337F7

Tints, shades & saturation

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

Lighter +40%#FFFBFB

Lighter +30%#FDCDCA

Lighter +20%#FB9F99

Lighter +10%#F97168

Darker −10%#F1180A

Darker −20%#C01308

Darker −30%#8F0E06

Darker −40%#5E0904

More saturated +25%#FF3C2F

Less saturated −25%#DD5A51

Channel breakdown

R247

G67

B55

Red247 (96.9%)

Green67 (26.3%)

Blue55 (21.6%)

Hue3.75°

Saturation (HSL)92.31%

Lightness59.22%

Dominant channelRed

Hex per channelR F7 · G 43 · B 37

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F74337 (chemical formula)

Formula
1,412,254.326 g/mol
74337 atoms

F74337 has a molar mass of 1,412,254.326 g/mol, made up of 74337 atoms across 1 element: 74337 × F.

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Molar mass

Molar mass1,412,254.326 g/mol

Total atoms per molecule74337

Distinct elements1

Mass of one molecule2.3451035 × 10^-18 g

Molecules per gram4.2642042 × 10^17

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

F100%

Fluorine (F × 74337)1,412,254.326 g/mol, 100%

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Elements in this formula

Fluorine

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