Recognised as Colour

#FF3820

#FF3820
Red
Dark
Nearest: Orange red

#FF3820 is a red with RGB values 255, 56, 32 and HSL 6°, 100%, 56%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#FF3820#FF3820

HEX#FF3820

RGBrgb(255, 56, 32)

RGB (0–1)1, 0.2196, 0.1255

RGB percentages100%, 22%, 12.5%

HSLhsl(6.5, 100%, 56.3%)

HSV / HSBhsv(6.5, 87.5%, 100%)

CMYK0%, 78%, 87.5%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,726,048

CSS custom property--colour: #FF3820;

Brightness & contrast

Relative luminance0.24193WCAG 2.x, 0 is black and 1 is white

Perceived brightness146.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.84:1

Contrast with white3.6:1WCAG normal text: Fail

Contrast with black5.84:1WCAG normal text: AA

Greyscale equivalent#616161

Inverted#00C7DF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#796B18no red cones; affects about 1% of men; ΔE 78.1 from the original

Deuteranopia#A9970Dno green cones; the most common form, about 1% of men; ΔE 78.6 from the original

Tritanopia#FF0036no blue cones; rare, and affects men and women equally; ΔE 16.1 from the original

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

Contrast with white, large text3.6:1WCAG large text: AA

Contrast with black, large text5.84:1WCAG large text: AAA

Named colours

Orange red · ΔE 10.5 Red · ΔE 11.6 Tomato · ΔE 20.1 Crimson · ΔE 27.4 Coral · ΔE 31.2 Firebrick · ΔE 32.1

Nearest named CSS colourOrange red (#FF4500)ΔE 10.53, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#20E7FF

Analogous#FF2078, #FFA720

Triadic#20FF38, #3820FF

Split complementary#20FFA7, #2078FF

Tetradic#78FF20, #20E7FF, #A820FF

Tints, shades & saturation

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

Lighter +40%#FFEEEC

Lighter +30%#FFC1B9

Lighter +20%#FF9386

Lighter +10%#FF6653

Darker −10%#EC1900

Darker −20%#B91400

Darker −30%#860E00

Darker −40%#530900

More saturated +25%#FF3820

Less saturated −25%#E34E3C

Channel breakdown

R255

G56

B32

Red255 (100%)

Green56 (22%)

Blue32 (12.5%)

Hue6.46°

Saturation (HSL)100%

Lightness56.27%

Dominant channelRed

Hex per channelR FF · G 38 · B 20

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF3820 (chemical formula)

Formula
72,591.358 g/mol
3821 atoms

FF3820 has a molar mass of 72,591.358 g/mol, made up of 3821 atoms across 1 element: 3821 × F.

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Molar mass

Molar mass72,591.358 g/mol

Total atoms per molecule3821

Distinct elements1

Mass of one molecule1.2054079 × 10^-19 g

Molecules per gram8.2959472 × 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 × 3821)72,591.358 g/mol, 100%

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Elements in this formula

Fluorine

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