Recognised as Colour

#C31F66

#C31F66
Red
Dark
Nearest: Medium violet red

#C31F66 is a red with RGB values 195, 31, 102 and HSL 334°, 73%, 44%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Medium violet red.

Colour values

#C31F66#C31F66

HEX#C31F66

RGBrgb(195, 31, 102)

RGB (0–1)0.7647, 0.1216, 0.4

RGB percentages76.5%, 12.2%, 40%

HSLhsl(334, 72.6%, 44.3%)

HSV / HSBhsv(334, 84.1%, 76.5%)

CMYK0%, 84.1%, 47.7%, 23.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,787,558

CSS custom property--colour: #C31F66;

Brightness & contrast

Relative luminance0.13541WCAG 2.x, 0 is black and 1 is white

Perceived brightness114.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.66:1

Contrast with white5.66:1WCAG normal text: AA

Contrast with black3.71:1WCAG normal text: Fail

Greyscale equivalent#474747

Inverted#3CE099

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4B5367no red cones; affects about 1% of men; ΔE 65.6 from the original

Deuteranopia#767262no green cones; the most common form, about 1% of men; ΔE 67.2 from the original

Tritanopia#D40041no blue cones; rare, and affects men and women equally; ΔE 26 from the original

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

Contrast with white, large text5.66:1WCAG large text: AAA

Contrast with black, large text3.71:1WCAG large text: AA

Named colours

Medium violet red · ΔE 18.3 Deep pink · ΔE 24.2 Hot pink · ΔE 25.4 Pale violetred · ΔE 26.1 Indian red · ΔE 30.2 Crimson · ΔE 32.2

Nearest named CSS colourMedium violet red (#C71585)ΔE 18.27, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1FC37C

Analogous#C31FB8, #C32A1F

Triadic#66C31F, #1F66C3

Split complementary#1FC32A, #1FB8C3

Tetradic#B8C31F, #1FC37C, #2A1FC3

Tints, shades & saturation

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

Lighter +40%#F4BAD3

Lighter +30%#ED8EB7

Lighter +20%#E6629B

Lighter +10%#DF367F

Darker −10%#97184F

Darker −20%#6B1138

Darker −30%#3F0A21

Darker −40%#13030A

More saturated +25%#DF0362

Less saturated −25%#A73B6A

Channel breakdown

R195

G31

B102

Red195 (76.5%)

Green31 (12.2%)

Blue102 (40%)

Hue334.02°

Saturation (HSL)72.57%

Lightness44.31%

Dominant channelRed

Hex per channelR C3 · G 1F · B 66

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Harmonies

Lighter and darker

Similar named colours

Also reads as

C31F66 (chemical formula)

Formula
1,626.209 g/mol
97 atoms

C31F66 has a molar mass of 1,626.209 g/mol, made up of 97 atoms across 2 elements: 31 × C, 66 × F.

Open this reading on its own page →

Molar mass

Molar mass1,626.209 g/mol

Total atoms per molecule97

Distinct elements2

Mass of one molecule2.7003836 × 10^-21 g

Molecules per gram3.7031776 × 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

C22.9%

F77.1%

Carbon (C × 31)372.341 g/mol, 22.896%

Fluorine (F × 66)1,253.868 g/mol, 77.104%

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Elements in this formula

Nerdulate something else

Nothing in mind? Surprise me · today’s page