Recognised as Colour

#FF5C39

#FF5C39
Red
Dark
Nearest: Tomato

#FF5C39 is a red with RGB values 255, 92, 57 and HSL 11°, 100%, 61%. It is a dark colour, so black text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#FF5C39#FF5C39

HEX#FF5C39

RGBrgb(255, 92, 57)

RGB (0–1)1, 0.3608, 0.2235

RGB percentages100%, 36.1%, 22.4%

HSLhsl(10.6, 100%, 61.2%)

HSV / HSBhsv(10.6, 77.6%, 100%)

CMYK0%, 63.9%, 77.6%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,735,289

CSS custom property--colour: #FF5C39;

Brightness & contrast

Relative luminance0.2921WCAG 2.x, 0 is black and 1 is white

Perceived brightness157.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.84:1

Contrast with white3.07:1WCAG normal text: Fail

Contrast with black6.84:1WCAG normal text: AA

Greyscale equivalent#7C7C7C

Inverted#00A3C6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#8B7C34no red cones; affects about 1% of men; ΔE 65.4 from the original

Deuteranopia#B3A132no green cones; the most common form, about 1% of men; ΔE 66.5 from the original

Tritanopia#FF2E55no blue cones; rare, and affects men and women equally; ΔE 26.8 from the original

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

Contrast with white, large text3.07:1WCAG large text: AA

Contrast with black, large text6.84:1WCAG large text: AAA

Named colours

Tomato · ΔE 6.4 Coral · ΔE 16.9 Orange red · ΔE 18.7 Chocolate · ΔE 24.2 Crimson · ΔE 25.6 Red · ΔE 26

Nearest named CSS colourTomato (#FF6347)ΔE 6.4, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#39DCFF

Analogous#FF3979, #FFBF39

Triadic#39FF5C, #5C39FF

Split complementary#39FFBF, #3979FF

Tetradic#79FF39, #39DCFF, #BF39FF

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFDAD2

Lighter +20%#FFB09F

Lighter +10%#FF866C

Darker −10%#FF3206

Darker −20%#D22500

Darker −30%#9F1C00

Darker −40%#6C1300

More saturated +25%#FF5C39

Less saturated −25%#E66C52

Channel breakdown

R255

G92

B57

Red255 (100%)

Green92 (36.1%)

Blue57 (22.4%)

Hue10.61°

Saturation (HSL)100%

Lightness61.18%

Dominant channelRed

Hex per channelR FF · G 5C · B 39

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF5C39 (chemical formula)

Formula
582.417 g/mol
45 atoms

FF5C39 has a molar mass of 582.417 g/mol, made up of 45 atoms across 2 elements: 6 × F, 39 × C.

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Molar mass

Molar mass582.417 g/mol

Total atoms per molecule45

Distinct elements2

Mass of one molecule9.6712618 × 10^-22 g

Molecules per gram1.0339912 × 10^21

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

F19.6%

C80.4%

Fluorine (F × 6)113.988 g/mol, 19.572%

Carbon (C × 39)468.429 g/mol, 80.428%

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