Recognised as Colour

#F70557

#F70557
Red
Dark
Nearest: Crimson

#F70557 is a red with RGB values 247, 5, 87 and HSL 340°, 96%, 49%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#F70557#F70557

HEX#F70557

RGBrgb(247, 5, 87)

RGB (0–1)0.9686, 0.0196, 0.3412

RGB percentages96.9%, 2%, 34.1%

HSLhsl(339.7, 96%, 49.4%)

HSV / HSBhsv(339.7, 98%, 96.9%)

CMYK0%, 98%, 64.8%, 3.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,188,759

CSS custom property--colour: #F70557;

Brightness & contrast

Relative luminance0.20571WCAG 2.x, 0 is black and 1 is white

Perceived brightness138.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.11:1

Contrast with white4.11:1WCAG normal text: Fail

Contrast with black5.11:1WCAG normal text: AA

Greyscale equivalent#3E3E3E

Inverted#08FAA8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#636058no red cones; affects about 1% of men; ΔE 83.7 from the original

Deuteranopia#9A8D51no green cones; the most common form, about 1% of men; ΔE 84.3 from the original

Tritanopia#FF0034no blue cones; rare, and affects men and women equally; ΔE 22.1 from the original

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

Contrast with white, large text4.11:1WCAG large text: AA

Contrast with black, large text5.11:1WCAG large text: AAA

Named colours

Crimson · ΔE 13.4 Firebrick · ΔE 30.1 Deep pink · ΔE 31.5 Tomato · ΔE 32.1 Brown · ΔE 34.1 Indian red · ΔE 35.3

Nearest named CSS colourCrimson (#DC143C)ΔE 13.42, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#05F7A5

Analogous#F705D0, #F72C05

Triadic#57F705, #0557F7

Split complementary#05F72C, #05D0F7

Tetradic#D0F705, #05F7A5, #2C05F7

Tints, shades & saturation

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

Lighter +40%#FECADC

Lighter +30%#FD98BA

Lighter +20%#FC6699

Lighter +10%#FB3477

Darker −10%#C50445

Darker −20%#930334

Darker −30%#610222

Darker −40%#2F0111

More saturated +25%#FC0055

Less saturated −25%#D82561

Channel breakdown

R247

B87

Red247 (96.9%)

Green5 (2%)

Blue87 (34.1%)

Hue339.67°

Saturation (HSL)96.03%

Lightness49.41%

Dominant channelRed

Hex per channelR F7 · G 05 · B 57

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F70557 (chemical formula)

Formula
1,340,441.886 g/mol
70557 atoms

F70557 has a molar mass of 1,340,441.886 g/mol, made up of 70557 atoms across 1 element: 70557 × F.

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Molar mass

Molar mass1,340,441.886 g/mol

Total atoms per molecule70557

Distinct elements1

Mass of one molecule2.2258561 × 10^-18 g

Molecules per gram4.4926534 × 10^17

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 × 70557)1,340,441.886 g/mol, 100%

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Elements in this formula

Fluorine

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