Recognised as Colour

#FF272B

#FF272B
Red
Dark
Nearest: Red

#FF272B is a red with RGB values 255, 39, 43 and HSL 359°, 100%, 58%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF272B#FF272B

HEX#FF272B

RGBrgb(255, 39, 43)

RGB (0–1)1, 0.1529, 0.1686

RGB percentages100%, 15.3%, 16.9%

HSLhsl(358.9, 100%, 57.6%)

HSV / HSBhsv(358.9, 84.7%, 100%)

CMYK0%, 84.7%, 83.1%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,721,707

CSS custom property--colour: #FF272B;

Brightness & contrast

Relative luminance0.22885WCAG 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 5.58:1

Contrast with white3.77:1WCAG normal text: Fail

Contrast with black5.58:1WCAG normal text: AA

Greyscale equivalent#555555

Inverted#00D8D4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#726627no red cones; affects about 1% of men; ΔE 82.4 from the original

Deuteranopia#A6941Dno green cones; the most common form, about 1% of men; ΔE 82.2 from the original

Tritanopia#FF002Dno blue cones; rare, and affects men and women equally; ΔE 5.3 from the original

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

Contrast with white, large text3.77:1WCAG large text: AA

Contrast with black, large text5.58:1WCAG large text: AAA

Named colours

Red · ΔE 14.5 Orange red · ΔE 17.9 Tomato · ΔE 20.9 Crimson · ΔE 21.9 Firebrick · ΔE 30.1 Coral · ΔE 33.7

Nearest named CSS colourRed (#FF0000)ΔE 14.49, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#27FFFB

Analogous#FF2797, #FF8F27

Triadic#2BFF27, #272BFF

Split complementary#27FF8F, #2797FF

Tetradic#97FF27, #27FFFB, #8F27FF

Tints, shades & saturation

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

Lighter +40%#FFF3F3

Lighter +30%#FFC0C1

Lighter +20%#FF8D8F

Lighter +10%#FF5A5D

Darker −10%#F30004

Darker −20%#C00004

Darker −30%#8D0003

Darker −40%#5A0002

More saturated +25%#FF272B

Less saturated −25%#E44245

Channel breakdown

R255

G39

B43

Red255 (100%)

Green39 (15.3%)

Blue43 (16.9%)

Hue358.89°

Saturation (HSL)100%

Lightness57.65%

Dominant channelRed

Hex per channelR FF · G 27 · B 2B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF272B (chemical formula)

Formula
5,197.264 g/mol
274 atoms

FF272B has a molar mass of 5,197.264 g/mol, made up of 274 atoms across 2 elements: 273 × F, 1 × B.

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Molar mass

Molar mass5,197.264 g/mol

Total atoms per molecule274

Distinct elements2

Mass of one molecule8.6302599 × 10^-21 g

Molecules per gram1.1587137 × 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

F99.8%

B0.2%

Fluorine (F × 273)5,186.454 g/mol, 99.792%

Boron (B)10.81 g/mol, 0.208%

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