Recognised as Colour

#F51754

#F51754
Red
Dark
Nearest: Crimson

#F51754 is a red with RGB values 245, 23, 84 and HSL 344°, 92%, 53%. 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

#F51754#F51754

HEX#F51754

RGBrgb(245, 23, 84)

RGB (0–1)0.9608, 0.0902, 0.3294

RGB percentages96.1%, 9%, 32.9%

HSLhsl(343.5, 91.7%, 52.5%)

HSV / HSBhsv(343.5, 90.6%, 96.1%)

CMYK0%, 90.6%, 65.7%, 3.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,062,292

CSS custom property--colour: #F51754;

Brightness & contrast

Relative luminance0.20665WCAG 2.x, 0 is black and 1 is white

Perceived brightness138.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.13:1

Contrast with white4.09:1WCAG normal text: Fail

Contrast with black5.13:1WCAG normal text: AA

Greyscale equivalent#4B4B4B

Inverted#0AE8AB

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#656154no red cones; affects about 1% of men; ΔE 81.7 from the original

Deuteranopia#9A8D4Eno green cones; the most common form, about 1% of men; ΔE 82.3 from the original

Tritanopia#FF0036no blue cones; rare, and affects men and women equally; ΔE 19.4 from the original

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

Contrast with white, large text4.09:1WCAG large text: AA

Contrast with black, large text5.13:1WCAG large text: AAA

Named colours

Crimson · ΔE 10.9 Firebrick · ΔE 27.7 Tomato · ΔE 29.3 Brown · ΔE 32 Indian red · ΔE 33.3 Deep pink · ΔE 33.7

Nearest named CSS colourCrimson (#DC143C)ΔE 10.88, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17F5B8

Analogous#F517C3, #F54917

Triadic#54F517, #1754F5

Split complementary#17F549, #17C3F5

Tetradic#C3F517, #17F5B8, #4917F5

Tints, shades & saturation

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

Lighter +40%#FDDBE4

Lighter +30%#FBAAC0

Lighter +20%#F9799C

Lighter +10%#F74878

Darker −10%#D00940

Darker −20%#9F0731

Darker −30%#6E0522

Darker −40%#3D0313

More saturated +25%#FF0D4F

Less saturated −25%#D73562

Channel breakdown

R245

G23

B84

Red245 (96.1%)

Green23 (9%)

Blue84 (32.9%)

Hue343.51°

Saturation (HSL)91.74%

Lightness52.55%

Dominant channelRed

Hex per channelR F5 · G 17 · B 54

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F51754 (chemical formula)

Formula
983,222.492 g/mol
51754 atoms

F51754 has a molar mass of 983,222.492 g/mol, made up of 51754 atoms across 1 element: 51754 × F.

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Molar mass

Molar mass983,222.492 g/mol

Total atoms per molecule51754

Distinct elements1

Mass of one molecule1.6326794 × 10^-18 g

Molecules per gram6.1249013 × 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 × 51754)983,222.492 g/mol, 100%

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Elements in this formula

Fluorine

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