Recognised as Colour

#FE5138

#FE5138
Red
Dark
Nearest: Tomato

#FE5138 is a red with RGB values 254, 81, 56 and HSL 8°, 99%, 61%. It is a dark colour, so black text on it reaches 6.4:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#FE5138#FE5138

HEX#FE5138

RGBrgb(254, 81, 56)

RGB (0–1)0.9961, 0.3176, 0.2196

RGB percentages99.6%, 31.8%, 22%

HSLhsl(7.6, 99%, 60.8%)

HSV / HSBhsv(7.6, 78%, 99.6%)

CMYK0%, 68.1%, 78%, 0.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,666,936

CSS custom property--colour: #FE5138;

Brightness & contrast

Relative luminance0.27241WCAG 2.x, 0 is black and 1 is white

Perceived brightness153.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.45:1

Contrast with white3.26:1WCAG normal text: Fail

Contrast with black6.45:1WCAG normal text: AA

Greyscale equivalent#747474

Inverted#01AEC7

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#847634no red cones; affects about 1% of men; ΔE 69.5 from the original

Deuteranopia#AE9D31no green cones; the most common form, about 1% of men; ΔE 70.6 from the original

Tritanopia#FF0F4Dno blue cones; rare, and affects men and women equally; ΔE 24.3 from the original

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

Contrast with white, large text3.26:1WCAG large text: AA

Contrast with black, large text6.45:1WCAG large text: AAA

Named colours

Tomato · ΔE 8.3 Orange red · ΔE 18.5 Coral · ΔE 20.8 Crimson · ΔE 22.2 Red · ΔE 23.6 Firebrick · ΔE 25.4

Nearest named CSS colourTomato (#FF6347)ΔE 8.32, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#38E5FE

Analogous#FE3882, #FEB438

Triadic#38FE51, #5138FE

Split complementary#38FEB4, #3882FE

Tetradic#82FE38, #38E5FE, #B438FE

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFD6D0

Lighter +20%#FFAA9D

Lighter +10%#FE7D6B

Darker −10%#FE2505

Darker −20%#CF1B01

Darker −30%#9C1401

Darker −40%#690E01

More saturated +25%#FF5037

Less saturated −25%#E56451

Channel breakdown

R254

G81

B56

Red254 (99.6%)

Green81 (31.8%)

Blue56 (22%)

Hue7.58°

Saturation (HSL)99%

Lightness60.78%

Dominant channelRed

Hex per channelR FE · G 51 · B 38

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Fe5138 (chemical formula)

Formula
286,931.61 g/mol
5138 atoms

Fe5138 has a molar mass of 286,931.61 g/mol, made up of 5138 atoms across 1 element: 5138 × Fe.

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Molar mass

Molar mass286,931.61 g/mol

Total atoms per molecule5138

Distinct elements1

Mass of one molecule4.7646115 × 10^-19 g

Molecules per gram2.098807 × 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 × 5138)286,931.61 g/mol, 100%

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Elements in this formula

Iron

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