Recognised as Colour

#F52F57

#F52F57
Red
Dark
Nearest: Crimson

#F52F57 is a red with RGB values 245, 47, 87 and HSL 348°, 91%, 57%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#F52F57#F52F57

HEX#F52F57

RGBrgb(245, 47, 87)

RGB (0–1)0.9608, 0.1843, 0.3412

RGB percentages96.1%, 18.4%, 34.1%

HSLhsl(347.9, 90.8%, 57.3%)

HSV / HSBhsv(347.9, 80.8%, 96.1%)

CMYK0%, 80.8%, 64.5%, 3.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,068,439

CSS custom property--colour: #F52F57;

Brightness & contrast

Relative luminance0.22134WCAG 2.x, 0 is black and 1 is white

Perceived brightness141.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.43:1

Contrast with white3.87:1WCAG normal text: Fail

Contrast with black5.43:1WCAG normal text: AA

Greyscale equivalent#5C5C5C

Inverted#0AD0A8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6C6757no red cones; affects about 1% of men; ΔE 77.2 from the original

Deuteranopia#9D9051no green cones; the most common form, about 1% of men; ΔE 78.1 from the original

Tritanopia#FF0041no blue cones; rare, and affects men and women equally; ΔE 14.9 from the original

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

Contrast with white, large text3.87:1WCAG large text: AA

Contrast with black, large text5.43:1WCAG large text: AAA

Named colours

Crimson · ΔE 9.8 Firebrick · ΔE 25.3 Tomato · ΔE 25.9 Indian red · ΔE 29.1 Brown · ΔE 29.2 Salmon · ΔE 31.2

Nearest named CSS colourCrimson (#DC143C)ΔE 9.79, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#2FF5CD

Analogous#F52FBA, #F56A2F

Triadic#57F52F, #2F57F5

Split complementary#2FF56A, #2FBAF5

Tetradic#BAF52F, #2FF5CD, #6A2FF5

Tints, shades & saturation

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

Lighter +40%#FEF2F4

Lighter +30%#FCC1CD

Lighter +20%#FA90A6

Lighter +10%#F7607E

Darker −10%#E60B37

Darker −20%#B5092C

Darker −30%#850620

Darker −40%#540414

More saturated +25%#FF2551

Less saturated −25%#DA4A67

Channel breakdown

R245

G47

B87

Red245 (96.1%)

Green47 (18.4%)

Blue87 (34.1%)

Hue347.88°

Saturation (HSL)90.83%

Lightness57.25%

Dominant channelRed

Hex per channelR F5 · G 2F · B 57

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F52F57 (chemical formula)

Formula
2,070.782 g/mol
109 atoms

F52F57 has a molar mass of 2,070.782 g/mol, made up of 109 atoms across 1 element: 109 × F.

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Molar mass

Molar mass2,070.782 g/mol

Total atoms per molecule109

Distinct elements1

Mass of one molecule3.4386144 × 10^-21 g

Molecules per gram2.9081481 × 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 × 109)2,070.782 g/mol, 100%

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Elements in this formula

Fluorine

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