Recognised as Colour

#FF5750

#FF5750
Red
Dark
Nearest: Tomato

#FF5750 is a red with RGB values 255, 87, 80 and HSL 2°, 100%, 66%. It is a dark colour, so black text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#FF5750#FF5750

HEX#FF5750

RGBrgb(255, 87, 80)

RGB (0–1)1, 0.3412, 0.3137

RGB percentages100%, 34.1%, 31.4%

HSLhsl(2.4, 100%, 65.7%)

HSV / HSBhsv(2.4, 68.6%, 100%)

CMYK0%, 65.9%, 68.6%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,734,032

CSS custom property--colour: #FF5750;

Brightness & contrast

Relative luminance0.28656WCAG 2.x, 0 is black and 1 is white

Perceived brightness156.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.73:1

Contrast with white3.12:1WCAG normal text: Fail

Contrast with black6.73:1WCAG normal text: AA

Greyscale equivalent#7A7A7A

Inverted#00A8AF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#857B4Eno red cones; affects about 1% of men; ΔE 68.3 from the original

Deuteranopia#AF9F4Bno green cones; the most common form, about 1% of men; ΔE 68.5 from the original

Tritanopia#FF2957no blue cones; rare, and affects men and women equally; ΔE 18 from the original

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

Contrast with white, large text3.12:1WCAG large text: AA

Contrast with black, large text6.73:1WCAG large text: AAA

Named colours

Tomato · ΔE 8.8 Crimson · ΔE 16.6 Coral · ΔE 20.7 Salmon · ΔE 21.9 Firebrick · ΔE 22.7 Indian red · ΔE 26.3

Nearest named CSS colourTomato (#FF6347)ΔE 8.83, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#50F8FF

Analogous#FF50A1, #FFAE50

Triadic#50FF57, #5750FF

Split complementary#50FFAE, #50A1FF

Tetradic#A1FF50, #50F8FF, #AF50FF

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFEAE9

Lighter +20%#FFB9B6

Lighter +10%#FF8883

Darker −10%#FF261D

Darker −20%#E90900

Darker −30%#B60700

Darker −40%#830500

More saturated +25%#FF5750

Less saturated −25%#E96B66

Channel breakdown

R255

G87

B80

Red255 (100%)

Green87 (34.1%)

Blue80 (31.4%)

Hue2.4°

Saturation (HSL)100%

Lightness65.69%

Dominant channelRed

Hex per channelR FF · G 57 · B 50

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF5750 (chemical formula)

Formula
109,257.498 g/mol
5751 atoms

FF5750 has a molar mass of 109,257.498 g/mol, made up of 5751 atoms across 1 element: 5751 × F.

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Molar mass

Molar mass109,257.498 g/mol

Total atoms per molecule5751

Distinct elements1

Mass of one molecule1.8142634 × 10^-19 g

Molecules per gram5.5118787 × 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%

Fluorine (F × 5751)109,257.498 g/mol, 100%

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Elements in this formula

Fluorine

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