Recognised as Colour

#FF2857

#FF2857
Red
Dark
Nearest: Crimson

#FF2857 is a red with RGB values 255, 40, 87 and HSL 347°, 100%, 58%. 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

#FF2857#FF2857

HEX#FF2857

RGBrgb(255, 40, 87)

RGB (0–1)1, 0.1569, 0.3412

RGB percentages100%, 15.7%, 34.1%

HSLhsl(346.9, 100%, 57.8%)

HSV / HSBhsv(346.9, 84.3%, 100%)

CMYK0%, 84.3%, 65.9%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,722,007

CSS custom property--colour: #FF2857;

Brightness & contrast

Relative luminance0.23466WCAG 2.x, 0 is black and 1 is white

Perceived brightness145.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.69:1

Contrast with white3.69:1WCAG normal text: Fail

Contrast with black5.69:1WCAG normal text: AA

Greyscale equivalent#595959

Inverted#00D7A8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6E6957no red cones; affects about 1% of men; ΔE 81.8 from the original

Deuteranopia#A39551no green cones; the most common form, about 1% of men; ΔE 82.4 from the original

Tritanopia#FF003Eno blue cones; rare, and affects men and women equally; ΔE 12.9 from the original

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

Contrast with white, large text3.69:1WCAG large text: AA

Contrast with black, large text5.69:1WCAG large text: AAA

Named colours

Crimson · ΔE 11.5 Tomato · ΔE 26.8 Firebrick · ΔE 28.4 Brown · ΔE 33.2 Indian red · ΔE 33.6 Salmon · ΔE 34.4

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#28FFD0

Analogous#FF28C2, #FF6528

Triadic#57FF28, #2857FF

Split complementary#28FF65, #28C2FF

Tetradic#C2FF28, #28FFD0, #6528FF

Tints, shades & saturation

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

Lighter +40%#FFF4F6

Lighter +30%#FFC1CF

Lighter +20%#FF8EA7

Lighter +10%#FF5B7F

Darker −10%#F40035

Darker −20%#C1002A

Darker −30%#8E001F

Darker −40%#5B0014

More saturated +25%#FF2857

Less saturated −25%#E44366

Channel breakdown

R255

G40

B87

Red255 (100%)

Green40 (15.7%)

Blue87 (34.1%)

Hue346.88°

Saturation (HSL)100%

Lightness57.84%

Dominant channelRed

Hex per channelR FF · G 28 · B 57

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF2857 (chemical formula)

Formula
54,296.284 g/mol
2858 atoms

FF2857 has a molar mass of 54,296.284 g/mol, made up of 2858 atoms across 1 element: 2858 × F.

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Molar mass

Molar mass54,296.284 g/mol

Total atoms per molecule2858

Distinct elements1

Mass of one molecule9.0161101 × 10^-20 g

Molecules per gram1.1091258 × 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

F100%

Fluorine (F × 2858)54,296.284 g/mol, 100%

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Elements in this formula

Fluorine

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