Recognised as Colour

#F83840

#F83840
Red
Dark
Nearest: Crimson

#F83840 is a red with RGB values 248, 56, 64 and HSL 358°, 93%, 60%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#F83840#F83840

HEX#F83840

RGBrgb(248, 56, 64)

RGB (0–1)0.9725, 0.2196, 0.251

RGB percentages97.3%, 22%, 25.1%

HSLhsl(357.5, 93.2%, 59.6%)

HSV / HSBhsv(357.5, 77.4%, 97.3%)

CMYK0%, 77.4%, 74.2%, 2.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,267,328

CSS custom property--colour: #F83840;

Brightness & contrast

Relative luminance0.23155WCAG 2.x, 0 is black and 1 is white

Perceived brightness143.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.63:1

Contrast with white3.73:1WCAG normal text: Fail

Contrast with black5.63:1WCAG normal text: AA

Greyscale equivalent#616161

Inverted#07C7BF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#746A3Eno red cones; affects about 1% of men; ΔE 76.1 from the original

Deuteranopia#A39339no green cones; the most common form, about 1% of men; ΔE 76.4 from the original

Tritanopia#FF003Dno blue cones; rare, and affects men and women equally; ΔE 10.3 from the original

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

Contrast with white, large text3.73:1WCAG large text: AA

Contrast with black, large text5.63:1WCAG large text: AAA

Named colours

Crimson · ΔE 11.8 Tomato · ΔE 15.4 Firebrick · ΔE 22.5 Red · ΔE 26.8 Orange red · ΔE 27.1 Coral · ΔE 28.8

Nearest named CSS colourCrimson (#DC143C)ΔE 11.82, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#38F8F0

Analogous#F838A0, #F89038

Triadic#40F838, #3840F8

Split complementary#38F890, #38A0F8

Tetradic#A0F838, #38F8F0, #9038F8

Tints, shades & saturation

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

Lighter +40%#FFFDFD

Lighter +30%#FDCCCE

Lighter +20%#FB9B9F

Lighter +10%#FA696F

Darker −10%#F40912

Darker −20%#C3070F

Darker −30%#92050B

Darker −40%#610307

More saturated +25%#FF313A

Less saturated −25%#DE5258

Channel breakdown

R248

G56

B64

Red248 (97.3%)

Green56 (22%)

Blue64 (25.1%)

Hue357.5°

Saturation (HSL)93.2%

Lightness59.61%

Dominant channelRed

Hex per channelR F8 · G 38 · B 40

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F83840 (chemical formula)

Formula
1,592,792.32 g/mol
83840 atoms

F83840 has a molar mass of 1,592,792.32 g/mol, made up of 83840 atoms across 1 element: 83840 × F.

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Molar mass

Molar mass1,592,792.32 g/mol

Total atoms per molecule83840

Distinct elements1

Mass of one molecule2.6448939 × 10^-18 g

Molecules per gram3.78087 × 10^17

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 × 83840)1,592,792.32 g/mol, 100%

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Elements in this formula

Fluorine

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