Recognised as Colour

#F4342B

#F4342B
Red
Dark
Nearest: Tomato

#F4342B is a red with RGB values 244, 52, 43 and HSL 3°, 90%, 56%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#F4342B#F4342B

HEX#F4342B

RGBrgb(244, 52, 43)

RGB (0–1)0.9569, 0.2039, 0.1686

RGB percentages95.7%, 20.4%, 16.9%

HSLhsl(2.7, 90.1%, 56.3%)

HSV / HSBhsv(2.7, 82.4%, 95.7%)

CMYK0%, 78.7%, 82.4%, 4.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,004,139

CSS custom property--colour: #F4342B;

Brightness & contrast

Relative luminance0.21863WCAG 2.x, 0 is black and 1 is white

Perceived brightness140 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.37:1

Contrast with white3.91:1WCAG normal text: Fail

Contrast with black5.37:1WCAG normal text: AA

Greyscale equivalent#5C5C5C

Inverted#0BCBD4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#726627no red cones; affects about 1% of men; ΔE 76.1 from the original

Deuteranopia#A19020no green cones; the most common form, about 1% of men; ΔE 76.2 from the original

Tritanopia#FF0035no blue cones; rare, and affects men and women equally; ΔE 11.7 from the original

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

Contrast with white, large text3.91:1WCAG large text: AA

Contrast with black, large text5.37:1WCAG large text: AAA

Named colours

Tomato · ΔE 15.8 Orange red · ΔE 17.9 Red · ΔE 18.5 Crimson · ΔE 19.3 Firebrick · ΔE 24.8 Coral · ΔE 28.6

Nearest named CSS colourTomato (#FF6347)ΔE 15.78, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2BEBF4

Analogous#F42B87, #F4992B

Triadic#2BF434, #342BF4

Split complementary#2BF498, #2B87F4

Tetradic#86F42B, #2BEBF4, #982BF4

Tints, shades & saturation

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

Lighter +40%#FEEEED

Lighter +30%#FCBFBC

Lighter +20%#F9918C

Lighter +10%#F7625B

Darker −10%#E0150C

Darker −20%#B01109

Darker −30%#7F0C07

Darker −40%#4F0704

More saturated +25%#FF2A20

Less saturated −25%#D84D47

Channel breakdown

R244

G52

B43

Red244 (95.7%)

Green52 (20.4%)

Blue43 (16.9%)

Hue2.69°

Saturation (HSL)90.13%

Lightness56.27%

Dominant channelRed

Hex per channelR F4 · G 34 · B 2B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F4342B (chemical formula)

Formula
82,500.126 g/mol
4343 atoms

F4342B has a molar mass of 82,500.126 g/mol, made up of 4343 atoms across 2 elements: 4342 × F, 1 × B.

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Molar mass

Molar mass82,500.126 g/mol

Total atoms per molecule4343

Distinct elements2

Mass of one molecule1.3699468 × 10^-19 g

Molecules per gram7.2995534 × 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%

B0%

Fluorine (F × 4342)82,489.316 g/mol, 99.987%

Boron (B)10.81 g/mol, 0.013%

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