Recognised as Colour

#FF2156

#FF2156
Red
Dark
Nearest: Crimson

#FF2156 is a red with RGB values 255, 33, 86 and HSL 346°, 100%, 56%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FF2156#FF2156

HEX#FF2156

RGBrgb(255, 33, 86)

RGB (0–1)1, 0.1294, 0.3373

RGB percentages100%, 12.9%, 33.7%

HSLhsl(345.7, 100%, 56.5%)

HSV / HSBhsv(345.7, 87.1%, 100%)

CMYK0%, 87.1%, 66.3%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,720,214

CSS custom property--colour: #FF2156;

Brightness & contrast

Relative luminance0.2302WCAG 2.x, 0 is black and 1 is white

Perceived brightness144.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.6:1

Contrast with white3.75:1WCAG normal text: Fail

Contrast with black5.6:1WCAG normal text: AA

Greyscale equivalent#545454

Inverted#00DEA9

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6C6756no red cones; affects about 1% of men; ΔE 83 from the original

Deuteranopia#A2944Fno green cones; the most common form, about 1% of men; ΔE 83.7 from the original

Tritanopia#FF003Bno blue cones; rare, and affects men and women equally; ΔE 14.2 from the original

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

Contrast with white, large text3.75:1WCAG large text: AA

Contrast with black, large text5.6:1WCAG large text: AAA

Named colours

Crimson · ΔE 12 Tomato · ΔE 27.8 Firebrick · ΔE 29 Brown · ΔE 34 Indian red · ΔE 34.8 Salmon · ΔE 35.7

Nearest named CSS colourCrimson (#DC143C)ΔE 11.95, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#21FFCA

Analogous#FF21C5, #FF5B21

Triadic#56FF21, #2156FF

Split complementary#21FF5B, #21C5FF

Tetradic#C5FF21, #21FFCA, #5B21FF

Tints, shades & saturation

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

Lighter +40%#FFEDF1

Lighter +30%#FFBACA

Lighter +20%#FF87A4

Lighter +10%#FF547D

Darker −10%#ED0039

Darker −20%#BA002C

Darker −30%#870020

Darker −40%#540014

More saturated +25%#FF2156

Less saturated −25%#E33D65

Channel breakdown

R255

G33

B86

Red255 (100%)

Green33 (12.9%)

Blue86 (33.7%)

Hue345.68°

Saturation (HSL)100%

Lightness56.47%

Dominant channelRed

Hex per channelR FF · G 21 · B 56

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF2156 (chemical formula)

Formula
40,978.686 g/mol
2157 atoms

FF2156 has a molar mass of 40,978.686 g/mol, made up of 2157 atoms across 1 element: 2157 × F.

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Molar mass

Molar mass40,978.686 g/mol

Total atoms per molecule2157

Distinct elements1

Mass of one molecule6.8046709 × 10^-20 g

Molecules per gram1.4695788 × 10^19

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 × 2157)40,978.686 g/mol, 100%

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Elements in this formula

Fluorine

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