Recognised as Colour

#FF4750

#FF4750
Red
Dark
Nearest: Crimson

#FF4750 is a red with RGB values 255, 71, 80 and HSL 357°, 100%, 64%. It is a dark colour, so black text on it reaches 6.3:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FF4750#FF4750

HEX#FF4750

RGBrgb(255, 71, 80)

RGB (0–1)1, 0.2784, 0.3137

RGB percentages100%, 27.8%, 31.4%

HSLhsl(357.1, 100%, 63.9%)

HSV / HSBhsv(357.1, 72.2%, 100%)

CMYK0%, 72.2%, 68.6%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,729,936

CSS custom property--colour: #FF4750;

Brightness & contrast

Relative luminance0.26346WCAG 2.x, 0 is black and 1 is white

Perceived brightness152.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.27:1

Contrast with white3.35:1WCAG normal text: Fail

Contrast with black6.27:1WCAG normal text: AA

Greyscale equivalent#6F6F6F

Inverted#00B8AF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#7C734Fno red cones; affects about 1% of men; ΔE 73.8 from the original

Deuteranopia#AA9B4Ano green cones; the most common form, about 1% of men; ΔE 74.5 from the original

Tritanopia#FF004Cno blue cones; rare, and affects men and women equally; ΔE 13.8 from the original

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

Contrast with white, large text3.35:1WCAG large text: AA

Contrast with black, large text6.27:1WCAG large text: AAA

Named colours

Crimson · ΔE 12 Tomato · ΔE 15 Firebrick · ΔE 23.3 Salmon · ΔE 26.6 Coral · ΔE 27.3 Indian red · ΔE 28.8

Nearest named CSS colourCrimson (#DC143C)ΔE 12.01, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#47FFF6

Analogous#FF47AC, #FF9A47

Triadic#50FF47, #4750FF

Split complementary#47FF9A, #47ACFF

Tetradic#ACFF47, #47FFF6, #9A47FF

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFE0E2

Lighter +20%#FFADB1

Lighter +10%#FF7A81

Darker −10%#FF141F

Darker −20%#E0000B

Darker −30%#AD0008

Darker −40%#7A0006

More saturated +25%#FF4750

Less saturated −25%#E85E65

Channel breakdown

R255

G71

B80

Red255 (100%)

Green71 (27.8%)

Blue80 (31.4%)

Hue357.07°

Saturation (HSL)100%

Lightness63.92%

Dominant channelRed

Hex per channelR FF · G 47 · B 50

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF4750 (chemical formula)

Formula
90,259.498 g/mol
4751 atoms

FF4750 has a molar mass of 90,259.498 g/mol, made up of 4751 atoms across 1 element: 4751 × F.

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Molar mass

Molar mass90,259.498 g/mol

Total atoms per molecule4751

Distinct elements1

Mass of one molecule1.4987942 × 10^-19 g

Molecules per gram6.67203 × 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 × 4751)90,259.498 g/mol, 100%

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Elements in this formula

Fluorine

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