Recognised as Colour

#FF6C51

#FF6C51
Red
Dark
Nearest: Tomato

#FF6C51 is a red with RGB values 255, 108, 81 and HSL 9°, 100%, 66%. It is a dark colour, so black text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Tomato.

Colour values

#FF6C51#FF6C51

HEX#FF6C51

RGBrgb(255, 108, 81)

RGB (0–1)1, 0.4235, 0.3176

RGB percentages100%, 42.4%, 31.8%

HSLhsl(9.3, 100%, 65.9%)

HSV / HSBhsv(9.3, 68.2%, 100%)

CMYK0%, 57.6%, 68.2%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,739,409

CSS custom property--colour: #FF6C51;

Brightness & contrast

Relative luminance0.32579WCAG 2.x, 0 is black and 1 is white

Perceived brightness164.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 7.52:1

Contrast with white2.79:1WCAG normal text: Fail

Contrast with black7.52:1WCAG normal text: AAA

Greyscale equivalent#898989

Inverted#0093AE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#93874Eno red cones; affects about 1% of men; ΔE 59.6 from the original

Deuteranopia#B8A74Dno green cones; the most common form, about 1% of men; ΔE 59.9 from the original

Tritanopia#FF4D66no blue cones; rare, and affects men and women equally; ΔE 22.4 from the original

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

Contrast with white, large text2.79:1WCAG large text: Fail

Contrast with black, large text7.52:1WCAG large text: AAA

Named colours

Tomato · ΔE 5.2 Coral · ΔE 10.7 Salmon · ΔE 17 Chocolate · ΔE 23.5 Indian red · ΔE 25.2 Firebrick · ΔE 25.3

Nearest named CSS colourTomato (#FF6347)ΔE 5.16, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#51E4FF

Analogous#FF518D, #FFC351

Triadic#51FF6C, #6C51FF

Split complementary#51FFC3, #518DFF

Tetradic#8DFF51, #51E4FF, #C351FF

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFEDEA

Lighter +20%#FFC2B7

Lighter +10%#FF9784

Darker −10%#FF411E

Darker −20%#EA2400

Darker −30%#B71C00

Darker −40%#841400

More saturated +25%#FF6C51

Less saturated −25%#E97B67

Channel breakdown

R255

G108

B81

Red255 (100%)

Green108 (42.4%)

Blue81 (31.8%)

Hue9.31°

Saturation (HSL)100%

Lightness65.88%

Dominant channelRed

Hex per channelR FF · G 6C · B 51

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF6C51 (chemical formula)

Formula
745.547 g/mol
58 atoms

FF6C51 has a molar mass of 745.547 g/mol, made up of 58 atoms across 2 elements: 7 × F, 51 × C.

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Molar mass

Molar mass745.547 g/mol

Total atoms per molecule58

Distinct elements2

Mass of one molecule1.2380099 × 10^-21 g

Molecules per gram8.0774797 × 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

F17.8%

C82.2%

Fluorine (F × 7)132.986 g/mol, 17.837%

Carbon (C × 51)612.561 g/mol, 82.163%

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