Recognised as Colour

#FE2737

#FE2737
Red
Dark
Nearest: Crimson

#FE2737 is a red with RGB values 254, 39, 55 and HSL 356°, 99%, 57%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FE2737#FE2737

HEX#FE2737

RGBrgb(254, 39, 55)

RGB (0–1)0.9961, 0.1529, 0.2157

RGB percentages99.6%, 15.3%, 21.6%

HSLhsl(355.5, 99.1%, 57.5%)

HSV / HSBhsv(355.5, 84.6%, 99.6%)

CMYK0%, 84.6%, 78.3%, 0.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,656,183

CSS custom property--colour: #FE2737;

Brightness & contrast

Relative luminance0.22798WCAG 2.x, 0 is black and 1 is white

Perceived brightness143.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.56:1

Contrast with white3.78:1WCAG normal text: Fail

Contrast with black5.56:1WCAG normal text: AA

Greyscale equivalent#565656

Inverted#01D8C8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#716635no red cones; affects about 1% of men; ΔE 81.9 from the original

Deuteranopia#A4932Dno green cones; the most common form, about 1% of men; ΔE 82 from the original

Tritanopia#FF0031no blue cones; rare, and affects men and women equally; ΔE 5.1 from the original

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

Contrast with white, large text3.78:1WCAG large text: AA

Contrast with black, large text5.56:1WCAG large text: AAA

Named colours

Crimson · ΔE 16.4 Tomato · ΔE 19.8 Red · ΔE 20.6 Orange red · ΔE 23.7 Firebrick · ΔE 27.4 Coral · ΔE 33.3

Nearest named CSS colourCrimson (#DC143C)ΔE 16.4, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#27FEEE

Analogous#FE27A2, #FE8227

Triadic#37FE27, #2737FE

Split complementary#27FE82, #27A3FE

Tetradic#A3FE27, #27FEEE, #8327FE

Tints, shades & saturation

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

Lighter +40%#FFF2F3

Lighter +30%#FFBFC4

Lighter +20%#FE8D95

Lighter +10%#FE5A66

Darker −10%#F10113

Darker −20%#BE010F

Darker −30%#8B010B

Darker −40%#590007

More saturated +25%#FF2636

Less saturated −25%#E3424E

Channel breakdown

R254

G39

B55

Red254 (99.6%)

Green39 (15.3%)

Blue55 (21.6%)

Hue355.53°

Saturation (HSL)99.08%

Lightness57.45%

Dominant channelRed

Hex per channelR FE · G 27 · B 37

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Fe2737 (chemical formula)

Formula
152,847.765 g/mol
2737 atoms

Fe2737 has a molar mass of 152,847.765 g/mol, made up of 2737 atoms across 1 element: 2737 × Fe.

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Molar mass

Molar mass152,847.765 g/mol

Total atoms per molecule2737

Distinct elements1

Mass of one molecule2.5380969 × 10^-19 g

Molecules per gram3.93996 × 10^18

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

Fe100%

Iron (Fe × 2737)152,847.765 g/mol, 100%

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Elements in this formula

Iron

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