Colour

#FF2F22

#FF2F22
Red
Dark
Nearest: Red

#FF2F22 is a red with RGB values 255, 47, 34 and HSL 4°, 100%, 57%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF2F22#FF2F22

HEX#FF2F22

RGBrgb(255, 47, 34)

RGB (0–1)1, 0.1843, 0.1333

RGB percentages100%, 18.4%, 13.3%

HSLhsl(3.5, 100%, 56.7%)

HSV / HSBhsv(3.5, 86.7%, 100%)

CMYK0%, 81.6%, 86.7%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,723,746

CSS custom property--colour: #FF2F22;

Brightness & contrast

Relative luminance0.23409WCAG 2.x, 0 is black and 1 is white

Perceived brightness144.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.68:1

Contrast with white3.7:1WCAG normal text: Fail

Contrast with black5.68:1WCAG normal text: AA

Greyscale equivalent#5A5A5A

Inverted#00D0DD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#75681Cno red cones; affects about 1% of men; ΔE 80.7 from the original

Deuteranopia#A7950Fno green cones; the most common form, about 1% of men; ΔE 80.7 from the original

Tritanopia#FF0030no blue cones; rare, and affects men and women equally; ΔE 10.9 from the original

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

Contrast with white, large text3.7:1WCAG large text: AA

Contrast with black, large text5.68:1WCAG large text: AAA

Named colours

Red · ΔE 11.1 Orange red · ΔE 13 Tomato · ΔE 21.2 Crimson · ΔE 26 Firebrick · ΔE 31.9 Coral · ΔE 33

Nearest named CSS colourRed (#FF0000)ΔE 11.13, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#22F2FF

Analogous#FF2284, #FF9D22

Triadic#22FF2F, #2F22FF

Split complementary#22FF9D, #2284FF

Tetradic#84FF22, #22F2FF, #9D22FF

Tints, shades & saturation

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

Lighter +40%#FFEFEE

Lighter +30%#FFBFBB

Lighter +20%#FF8F88

Lighter +10%#FF5F55

Darker −10%#EE0E00

Darker −20%#BB0B00

Darker −30%#880800

Darker −40%#550500

More saturated +25%#FF2F22

Less saturated −25%#E3473E

Channel breakdown

R255

G47

B34

Red255 (100%)

Green47 (18.4%)

Blue34 (13.3%)

Hue3.53°

Saturation (HSL)100%

Lightness56.67%

Dominant channelRed

Hex per channelR FF · G 2F · B 22

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF2F22 (chemical formula)

Formula
474.95 g/mol
25 atoms

FF2F22 has a molar mass of 474.95 g/mol, made up of 25 atoms across 1 element: 25 × F.

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Molar mass

Molar mass474.95 g/mol

Total atoms per molecule25

Distinct elements1

Mass of one molecule7.8867303 × 10^-22 g

Molecules per gram1.2679526 × 10^21

Composition by mass

F100%

Fluorine (F × 25)474.95 g/mol, 100%

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Elements in this formula

Fluorine

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