Recognised as Colour

#FF535B

#FF535B
Red
Dark
Nearest: Crimson

#FF535B is a red with RGB values 255, 83, 91 and HSL 357°, 100%, 66%. It is a dark colour, so black text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FF535B#FF535B

HEX#FF535B

RGBrgb(255, 83, 91)

RGB (0–1)1, 0.3255, 0.3569

RGB percentages100%, 32.5%, 35.7%

HSLhsl(357.2, 100%, 66.3%)

HSV / HSBhsv(357.2, 67.5%, 100%)

CMYK0%, 67.5%, 64.3%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,733,019

CSS custom property--colour: #FF535B;

Brightness & contrast

Relative luminance0.28202WCAG 2.x, 0 is black and 1 is white

Perceived brightness156.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.64:1

Contrast with white3.16:1WCAG normal text: Fail

Contrast with black6.64:1WCAG normal text: AA

Greyscale equivalent#787878

Inverted#00ACA4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#82795Ano red cones; affects about 1% of men; ΔE 69.2 from the original

Deuteranopia#AD9E56no green cones; the most common form, about 1% of men; ΔE 70.1 from the original

Tritanopia#FF2457no blue cones; rare, and affects men and women equally; ΔE 14.3 from the original

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

Contrast with white, large text3.16:1WCAG large text: AA

Contrast with black, large text6.64:1WCAG large text: AAA

Named colours

Crimson · ΔE 14.2 Tomato · ΔE 15.6 Salmon · ΔE 21.7 Firebrick · ΔE 23.4 Indian red · ΔE 24.1 Coral · ΔE 25.7

Nearest named CSS colourCrimson (#DC143C)ΔE 14.22, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#53FFF7

Analogous#FF53B1, #FFA153

Triadic#5BFF53, #535BFF

Split complementary#53FFA1, #53B1FF

Tetradic#B1FF53, #53FFF7, #A153FF

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFECED

Lighter +20%#FFB9BC

Lighter +10%#FF868C

Darker −10%#FF202A

Darker −20%#EC000B

Darker −30%#B90009

Darker −40%#860006

More saturated +25%#FF535B

Less saturated −25%#EA686F

Channel breakdown

R255

G83

B91

Red255 (100%)

Green83 (32.5%)

Blue91 (35.7%)

Hue357.21°

Saturation (HSL)100%

Lightness66.27%

Dominant channelRed

Hex per channelR FF · G 53 · B 5B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF535B (chemical formula)

Formula
10,193.738 g/mol
537 atoms

FF535B has a molar mass of 10,193.738 g/mol, made up of 537 atoms across 2 elements: 536 × F, 1 × B.

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Molar mass

Molar mass10,193.738 g/mol

Total atoms per molecule537

Distinct elements2

Mass of one molecule1.69271 × 10^-20 g

Molecules per gram5.9076864 × 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

F99.9%

B0.1%

Fluorine (F × 536)10,182.928 g/mol, 99.894%

Boron (B)10.81 g/mol, 0.106%

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Elements in this formula

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