Recognised as Colour

#FB3342

#FB3342
Red
Dark
Nearest: Crimson

#FB3342 is a red with RGB values 251, 51, 66 and HSL 356°, 96%, 59%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FB3342#FB3342

HEX#FB3342

RGBrgb(251, 51, 66)

RGB (0–1)0.9843, 0.2, 0.2588

RGB percentages98.4%, 20%, 25.9%

HSLhsl(355.5, 96.2%, 59.2%)

HSV / HSBhsv(355.5, 79.7%, 98.4%)

CMYK0%, 79.7%, 73.7%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,462,658

CSS custom property--colour: #FB3342;

Brightness & contrast

Relative luminance0.2327WCAG 2.x, 0 is black and 1 is white

Perceived brightness144.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.65:1

Contrast with white3.71:1WCAG normal text: Fail

Contrast with black5.65:1WCAG normal text: AA

Greyscale equivalent#5F5F5F

Inverted#04CCBD

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#736940no red cones; affects about 1% of men; ΔE 78.2 from the original

Deuteranopia#A4943Ano green cones; the most common form, about 1% of men; ΔE 78.7 from the original

Tritanopia#FF003Bno blue cones; rare, and affects men and women equally; ΔE 8.4 from the original

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

Contrast with white, large text3.71:1WCAG large text: AA

Contrast with black, large text5.65:1WCAG large text: AAA

Named colours

Crimson · ΔE 11.5 Tomato · ΔE 17.5 Firebrick · ΔE 23.9 Red · ΔE 26.9 Orange red · ΔE 28.3 Coral · ΔE 30.9

Nearest named CSS colourCrimson (#DC143C)ΔE 11.53, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#33FBEC

Analogous#FB33A6, #FB8833

Triadic#42FB33, #3342FB

Split complementary#33FB88, #33A6FB

Tetradic#A6FB33, #33FBEC, #8833FB

Tints, shades & saturation

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

Lighter +40%#FFFBFB

Lighter +30%#FEC9CD

Lighter +20%#FD979F

Lighter +10%#FC6570

Darker −10%#F60517

Darker −20%#C40412

Darker −30%#92030E

Darker −40%#600209

More saturated +25%#FF2F3F

Less saturated −25%#E14D58

Channel breakdown

R251

G51

B66

Red251 (98.4%)

Green51 (20%)

Blue66 (25.9%)

Hue355.5°

Saturation (HSL)96.15%

Lightness59.22%

Dominant channelRed

Hex per channelR FB · G 33 · B 42

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FB3342 (chemical formula)

Formula
36,146.018 g/mol
3343 atoms

FB3342 has a molar mass of 36,146.018 g/mol, made up of 3343 atoms across 2 elements: 1 × F, 3342 × B.

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Molar mass

Molar mass36,146.018 g/mol

Total atoms per molecule3343

Distinct elements2

Mass of one molecule6.0021875 × 10^-20 g

Molecules per gram1.6660592 × 10^19

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

F0.1%

B99.9%

Fluorine (F)18.998 g/mol, 0.053%

Boron (B × 3342)36,127.02 g/mol, 99.947%

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Elements in this formula

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