Recognised as Colour

#FE6B51

#FE6B51
Red
Dark
Nearest: Tomato

#FE6B51 is a red with RGB values 254, 107, 81 and HSL 9°, 99%, 66%. It is a dark colour, so black text on it reaches 7.4:1 contrast (AAA for normal text). The nearest named colour is Tomato.

Colour values

#FE6B51#FE6B51

HEX#FE6B51

RGBrgb(254, 107, 81)

RGB (0–1)0.9961, 0.4196, 0.3176

RGB percentages99.6%, 42%, 31.8%

HSLhsl(9, 98.9%, 65.7%)

HSV / HSBhsv(9, 68.1%, 99.6%)

CMYK0%, 57.9%, 68.1%, 0.4%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,673,617

CSS custom property--colour: #FE6B51;

Brightness & contrast

Relative luminance0.3218WCAG 2.x, 0 is black and 1 is white

Perceived brightness163.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 7.44:1

Contrast with white2.82:1WCAG normal text: Fail

Contrast with black7.44:1WCAG normal text: AAA

Greyscale equivalent#888888

Inverted#0194AE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#92864Eno red cones; affects about 1% of men; ΔE 59.6 from the original

Deuteranopia#B7A64Dno green cones; the most common form, about 1% of men; ΔE 59.9 from the original

Tritanopia#FF4B65no blue cones; rare, and affects men and women equally; ΔE 22.3 from the original

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

Contrast with white, large text2.82:1WCAG large text: Fail

Contrast with black, large text7.44:1WCAG large text: AAA

Named colours

Tomato · ΔE 5.3 Coral · ΔE 11 Salmon · ΔE 16.8 Chocolate · ΔE 23.7 Indian red · ΔE 24.8 Firebrick · ΔE 24.9

Nearest named CSS colourTomato (#FF6347)ΔE 5.3, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#51E4FE

Analogous#FE518E, #FEC251

Triadic#51FE6B, #6B51FE

Split complementary#51FEC2, #518DFE

Tetradic#8DFE51, #51E4FE, #C251FE

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFECE9

Lighter +20%#FFC1B6

Lighter +10%#FE9684

Darker −10%#FE401E

Darker −20%#E82401

Darker −30%#B51C01

Darker −40%#821401

More saturated +25%#FF6A50

Less saturated −25%#E87A67

Channel breakdown

R254

G107

B81

Red254 (99.6%)

Green107 (42%)

Blue81 (31.8%)

Hue9.02°

Saturation (HSL)98.86%

Lightness65.69%

Dominant channelRed

Hex per channelR FE · G 6B · B 51

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Harmonies

Lighter and darker

Similar named colours

Also reads as

Fe6B51 (chemical formula)

Formula
886.38 g/mol
57 atoms

Fe6B51 has a molar mass of 886.38 g/mol, made up of 57 atoms across 2 elements: 6 × Fe, 51 × B.

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Molar mass

Molar mass886.38 g/mol

Total atoms per molecule57

Distinct elements2

Mass of one molecule1.4718686 × 10^-21 g

Molecules per gram6.7940847 × 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

Fe37.8%

B62.2%

Iron (Fe × 6)335.07 g/mol, 37.802%

Boron (B × 51)551.31 g/mol, 62.198%

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