Recognised as Colour

#CF3724

#CF3724
Red
Dark
Nearest: Firebrick

#CF3724 is a red with RGB values 207, 55, 36 and HSL 7°, 70%, 48%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#CF3724#CF3724

HEX#CF3724

RGBrgb(207, 55, 36)

RGB (0–1)0.8118, 0.2157, 0.1412

RGB percentages81.2%, 21.6%, 14.1%

HSLhsl(6.7, 70.4%, 47.6%)

HSV / HSBhsv(6.7, 82.6%, 81.2%)

CMYK0%, 73.4%, 82.6%, 18.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer13,580,068

CSS custom property--colour: #CF3724;

Brightness & contrast

Relative luminance0.16125WCAG 2.x, 0 is black and 1 is white

Perceived brightness121.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 4.97:1

Contrast with white4.97:1WCAG normal text: AA

Contrast with black4.23:1WCAG normal text: Fail

Greyscale equivalent#565656

Inverted#30C8DB

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#665A20no red cones; affects about 1% of men; ΔE 62.8 from the original

Deuteranopia#8B7C1Cno green cones; the most common form, about 1% of men; ΔE 63.4 from the original

Tritanopia#E40034no blue cones; rare, and affects men and women equally; ΔE 17.5 from the original

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

Contrast with white, large text4.97:1WCAG large text: AAA

Contrast with black, large text4.23:1WCAG large text: AA

Named colours

Firebrick · ΔE 12 Tomato · ΔE 15.1 Crimson · ΔE 18 Brown · ΔE 20.3 Dark red · ΔE 21 Coral · ΔE 23.9

Nearest named CSS colourFirebrick (#B22222)ΔE 12, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#24BCCF

Analogous#CF2466, #CF8D24

Triadic#24CF37, #3724CF

Split complementary#24CF8C, #2467CF

Tetradic#66CF24, #24BCCF, #8D24CF

Tints, shades & saturation

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

Lighter +40%#F6CEC9

Lighter +30%#EEA79E

Lighter +20%#E77F72

Lighter +10%#DF5847

Darker −10%#A42B1C

Darker −20%#782015

Darker −30%#4D140D

Darker −40%#210906

More saturated +25%#ED1F06

Less saturated −25%#B14F42

Channel breakdown

R207

G55

B36

Red207 (81.2%)

Green55 (21.6%)

Blue36 (14.1%)

Hue6.67°

Saturation (HSL)70.37%

Lightness47.65%

Dominant channelRed

Hex per channelR CF · G 37 · B 24

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Harmonies

Lighter and darker

Similar named colours

Also reads as

CF3724 (chemical formula)

Formula
70,760.563 g/mol
3725 atoms

CF3724 has a molar mass of 70,760.563 g/mol, made up of 3725 atoms across 2 elements: 1 × C, 3724 × F.

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Molar mass

Molar mass70,760.563 g/mol

Total atoms per molecule3725

Distinct elements2

Mass of one molecule1.1750068 × 10^-19 g

Molecules per gram8.5105891 × 10^18

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, 0.017%

Fluorine (F × 3724)70,748.552 g/mol, 99.983%

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