Recognised as Colour

#CF2222

#CF2222
Red
Dark
Nearest: Firebrick

#CF2222 is a red with RGB values 207, 34, 34 and HSL 0°, 72%, 47%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CF2222#CF2222

HEX#CF2222

RGBrgb(207, 34, 34)

RGB (0–1)0.8118, 0.1333, 0.1333

RGB percentages81.2%, 13.3%, 13.3%

HSLhsl(0, 71.8%, 47.3%)

HSV / HSBhsv(0, 83.6%, 81.2%)

CMYK0%, 83.6%, 83.6%, 18.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,574,690

CSS custom property--colour: #CF2222;

Brightness & contrast

Relative luminance0.14525WCAG 2.x, 0 is black and 1 is white

Perceived brightness116.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.38:1

Contrast with white5.38:1WCAG normal text: AA

Contrast with black3.9:1WCAG normal text: Fail

Greyscale equivalent#474747

Inverted#30DDDD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5D531Fno red cones; affects about 1% of men; ΔE 69.4 from the original

Deuteranopia#867817no green cones; the most common form, about 1% of men; ΔE 69.7 from the original

Tritanopia#E40025no blue cones; rare, and affects men and women equally; ΔE 10.6 from the original

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

Contrast with white, large text5.38:1WCAG large text: AAA

Contrast with black, large text3.9:1WCAG large text: AA

Named colours

Firebrick · ΔE 12.7 Crimson · ΔE 13.7 Tomato · ΔE 18.4 Dark red · ΔE 21.8 Brown · ΔE 22 Maroon · ΔE 26.3

Nearest named CSS colourFirebrick (#B22222)ΔE 12.7, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#22CFCF

Analogous#CF2278, #CF7822

Triadic#22CF22, #2222CF

Split complementary#22CF78, #2278CF

Tetradic#78CF22, #22CFCF, #7822CF

Tints, shades & saturation

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

Lighter +40%#F6C7C7

Lighter +30%#EF9B9B

Lighter +20%#E77070

Lighter +10%#E04444

Darker −10%#A31B1B

Darker −20%#771414

Darker −30%#4C0C0C

Darker −40%#200505

More saturated +25%#ED0404

Less saturated −25%#B14040

Channel breakdown

R207

G34

B34

Red207 (81.2%)

Green34 (13.3%)

Blue34 (13.3%)

Hue0°

Saturation (HSL)71.78%

Lightness47.25%

Dominant channelRed

Hex per channelR CF · G 22 · B 22

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Harmonies

Lighter and darker

Similar named colours

Also reads as

CF2222 (chemical formula)

Formula
42,225.567 g/mol
2223 atoms

CF2222 has a molar mass of 42,225.567 g/mol, made up of 2223 atoms across 2 elements: 1 × C, 2222 × F.

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Molar mass

Molar mass42,225.567 g/mol

Total atoms per molecule2223

Distinct elements2

Mass of one molecule7.0117204 × 10^-20 g

Molecules per gram1.4261835 × 10^19

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

C0%

F100%

Carbon (C)12.011 g/mol, 0.028%

Fluorine (F × 2222)42,213.556 g/mol, 99.972%

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Elements in this formula

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