Recognised as Colour

#FF284F

#FF284F
Red
Dark
Nearest: Crimson

#FF284F is a red with RGB values 255, 40, 79 and HSL 349°, 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

#FF284F#FF284F

HEX#FF284F

RGBrgb(255, 40, 79)

RGB (0–1)1, 0.1569, 0.3098

RGB percentages100%, 15.7%, 31%

HSLhsl(349.1, 100%, 57.8%)

HSV / HSBhsv(349.1, 84.3%, 100%)

CMYK0%, 84.3%, 69%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,721,999

CSS custom property--colour: #FF284F;

Brightness & contrast

Relative luminance0.23342WCAG 2.x, 0 is black and 1 is white

Perceived brightness145.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.67:1

Contrast with white3.7:1WCAG normal text: Fail

Contrast with black5.67:1WCAG normal text: AA

Greyscale equivalent#595959

Inverted#00D7B0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6F684Fno red cones; affects about 1% of men; ΔE 81.8 from the original

Deuteranopia#A39448no green cones; the most common form, about 1% of men; ΔE 82.2 from the original

Tritanopia#FF003Bno 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 text3.7:1WCAG large text: AA

Contrast with black, large text5.67:1WCAG large text: AAA

Named colours

Crimson · ΔE 10.5 Tomato · ΔE 23.9 Firebrick · ΔE 27 Brown · ΔE 33 Red · ΔE 33.3 Salmon · ΔE 34.4

Nearest named CSS colourCrimson (#DC143C)ΔE 10.48, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#28FFD8

Analogous#FF28BB, #FF6C28

Triadic#4FFF28, #284FFF

Split complementary#28FF6C, #28BBFF

Tetradic#BBFF28, #28FFD8, #6C28FF

Tints, shades & saturation

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

Lighter +40%#FFF4F6

Lighter +30%#FFC1CC

Lighter +20%#FF8EA2

Lighter +10%#FF5B79

Darker −10%#F4002C

Darker −20%#C10023

Darker −30%#8E001A

Darker −40%#5B0011

More saturated +25%#FF284F

Less saturated −25%#E44360

Channel breakdown

R255

G40

B79

Red255 (100%)

Green40 (15.7%)

Blue79 (31%)

Hue349.12°

Saturation (HSL)100%

Lightness57.84%

Dominant channelRed

Hex per channelR FF · G 28 · B 4F

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF284F (chemical formula)

Formula
5,433.428 g/mol
286 atoms

FF284F has a molar mass of 5,433.428 g/mol, made up of 286 atoms across 1 element: 286 × F.

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Molar mass

Molar mass5,433.428 g/mol

Total atoms per molecule286

Distinct elements1

Mass of one molecule9.0224195 × 10^-21 g

Molecules per gram1.1083502 × 10^20

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 × 286)5,433.428 g/mol, 100%

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Elements in this formula

Fluorine

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