Colour

#FF1F22

#FF1F22
Red
Dark
Nearest: Red

#FF1F22 is a red with RGB values 255, 31, 34 and HSL 359°, 100%, 56%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FF1F22#FF1F22

HEX#FF1F22

RGBrgb(255, 31, 34)

RGB (0–1)1, 0.1216, 0.1333

RGB percentages100%, 12.2%, 13.3%

HSLhsl(359.2, 100%, 56.1%)

HSV / HSBhsv(359.2, 87.8%, 100%)

CMYK0%, 87.8%, 86.7%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,719,650

CSS custom property--colour: #FF1F22;

Brightness & contrast

Relative luminance0.22355WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.47:1

Contrast with white3.84:1WCAG normal text: Fail

Contrast with black5.47:1WCAG normal text: AA

Greyscale equivalent#4F4F4F

Inverted#00E0DD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#70641Dno red cones; affects about 1% of men; ΔE 84.1 from the original

Deuteranopia#A5930Eno green cones; the most common form, about 1% of men; ΔE 83.7 from the original

Tritanopia#FF0026no blue cones; rare, and affects men and women equally; ΔE 4.2 from the original

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

Contrast with white, large text3.84:1WCAG large text: AA

Contrast with black, large text5.47:1WCAG large text: AAA

Named colours

Red · ΔE 10.5 Orange red · ΔE 15.6 Tomato · ΔE 23.6 Crimson · ΔE 25.5 Firebrick · ΔE 32.8 Coral · ΔE 35.9

Nearest named CSS colourRed (#FF0000)ΔE 10.51, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1FFFFC

Analogous#FF1F92, #FF8C1F

Triadic#22FF1F, #1F22FF

Split complementary#1FFF8C, #1F92FF

Tetradic#92FF1F, #1FFFFC, #8C1FFF

Tints, shades & saturation

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

Lighter +40%#FFEBEB

Lighter +30%#FFB8B9

Lighter +20%#FF8587

Lighter +10%#FF5254

Darker −10%#EB0003

Darker −20%#B80002

Darker −30%#850002

Darker −40%#520001

More saturated +25%#FF1F22

Less saturated −25%#E33B3D

Channel breakdown

R255

G31

B34

Red255 (100%)

Green31 (12.2%)

Blue34 (13.3%)

Hue359.2°

Saturation (HSL)100%

Lightness56.08%

Dominant channelRed

Hex per channelR FF · G 1F · B 22

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF1F22 (chemical formula)

Formula
455.952 g/mol
24 atoms

FF1F22 has a molar mass of 455.952 g/mol, made up of 24 atoms across 1 element: 24 × F.

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Molar mass

Molar mass455.952 g/mol

Total atoms per molecule24

Distinct elements1

Mass of one molecule7.5712611 × 10^-22 g

Molecules per gram1.3207839 × 10^21

Composition by mass

F100%

Fluorine (F × 24)455.952 g/mol, 100%

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Elements in this formula

Fluorine

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