Recognised as Colour

#FF3920

#FF3920
Red
Dark
Nearest: Orange red

#FF3920 is a red with RGB values 255, 57, 32 and HSL 7°, 100%, 56%. It is a dark colour, so black text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#FF3920#FF3920

HEX#FF3920

RGBrgb(255, 57, 32)

RGB (0–1)1, 0.2235, 0.1255

RGB percentages100%, 22.4%, 12.5%

HSLhsl(6.7, 100%, 56.3%)

HSV / HSBhsv(6.7, 87.5%, 100%)

CMYK0%, 77.6%, 87.5%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,726,304

CSS custom property--colour: #FF3920;

Brightness & contrast

Relative luminance0.24291WCAG 2.x, 0 is black and 1 is white

Perceived brightness146.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.86:1

Contrast with white3.58:1WCAG normal text: Fail

Contrast with black5.86:1WCAG normal text: AA

Greyscale equivalent#616161

Inverted#00C6DF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#796B18no red cones; affects about 1% of men; ΔE 77.8 from the original

Deuteranopia#A9970Dno green cones; the most common form, about 1% of men; ΔE 78.3 from the original

Tritanopia#FF0036no blue cones; rare, and affects men and women equally; ΔE 16.4 from the original

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

Contrast with white, large text3.58:1WCAG large text: AA

Contrast with black, large text5.86:1WCAG large text: AAA

Named colours

Orange red · ΔE 10.3 Red · ΔE 11.8 Tomato · ΔE 19.9 Crimson · ΔE 27.5 Coral · ΔE 31 Firebrick · ΔE 32

Nearest named CSS colourOrange red (#FF4500)ΔE 10.34, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#20E6FF

Analogous#FF2077, #FFA920

Triadic#20FF39, #3920FF

Split complementary#20FFA8, #2077FF

Tetradic#76FF20, #20E6FF, #A820FF

Tints, shades & saturation

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

Lighter +40%#FFEEEC

Lighter +30%#FFC1B9

Lighter +20%#FF9486

Lighter +10%#FF6653

Darker −10%#EC1A00

Darker −20%#B91500

Darker −30%#860F00

Darker −40%#530900

More saturated +25%#FF3920

Less saturated −25%#E34F3C

Channel breakdown

R255

G57

B32

Red255 (100%)

Green57 (22.4%)

Blue32 (12.5%)

Hue6.73°

Saturation (HSL)100%

Lightness56.27%

Dominant channelRed

Hex per channelR FF · G 39 · B 20

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF3920 (chemical formula)

Formula
74,491.158 g/mol
3921 atoms

FF3920 has a molar mass of 74,491.158 g/mol, made up of 3921 atoms across 1 element: 3921 × F.

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Molar mass

Molar mass74,491.158 g/mol

Total atoms per molecule3921

Distinct elements1

Mass of one molecule1.2369548 × 10^-19 g

Molecules per gram8.0843699 × 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

F100%

Fluorine (F × 3921)74,491.158 g/mol, 100%

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Elements in this formula

Fluorine

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