Colour

#B21756

#B21756
Red
Dark
Nearest: Medium violet red

#B21756 is a red with RGB values 178, 23, 86 and HSL 336°, 77%, 39%. It is a dark colour, so white text on it reaches 6.7:1 contrast (AA for normal text). The nearest named colour is Medium violet red.

Colour values

#B21756#B21756

HEX#B21756

RGBrgb(178, 23, 86)

RGB (0–1)0.698, 0.0902, 0.3373

RGB percentages69.8%, 9%, 33.7%

HSLhsl(335.6, 77.1%, 39.4%)

HSV / HSBhsv(335.6, 87.1%, 69.8%)

CMYK0%, 87.1%, 51.7%, 30.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,671,382

CSS custom property--colour: #B21756;

Brightness & contrast

Relative luminance0.1075WCAG 2.x, 0 is black and 1 is white

Perceived brightness103.1 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.67:1

Contrast with white6.67:1WCAG normal text: AA

Contrast with black3.15:1WCAG normal text: Fail

Greyscale equivalent#3D3D3D

Inverted#4DE8A9

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#444957no red cones; affects about 1% of men; ΔE 62.2 from the original

Deuteranopia#6C6752no green cones; the most common form, about 1% of men; ΔE 63.7 from the original

Tritanopia#C20036no blue cones; rare, and affects men and women equally; ΔE 23.7 from the original

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

Contrast with white, large text6.67:1WCAG large text: AAA

Contrast with black, large text3.15:1WCAG large text: AA

Named colours

Medium violet red · ΔE 23.4 Pale violetred · ΔE 27.1 Indian red · ΔE 27.4 Brown · ΔE 27.7 Deep pink · ΔE 30.7 Crimson · ΔE 30.8

Nearest named CSS colourMedium violet red (#C71585)ΔE 23.45, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17B273

Analogous#B217A3, #B22617

Triadic#56B217, #1756B2

Split complementary#17B226, #17A3B2

Tetradic#A3B217, #17B273, #2617B2

Tints, shades & saturation

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

Lighter +40%#F3A2C3

Lighter +30%#ED75A6

Lighter +20%#E74889

Lighter +10%#DF1D6C

Darker −10%#851140

Darker −20%#580B2A

Darker −30%#2B0515

Darker −40%#000000

More saturated +25%#C90052

Less saturated −25%#99305B

Channel breakdown

R178

G23

B86

Red178 (69.8%)

Green23 (9%)

Blue86 (33.7%)

Hue335.61°

Saturation (HSL)77.11%

Lightness39.41%

Dominant channelRed

Hex per channelR B2 · G 17 · B 56

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B21756 (chemical formula)

Formula
235,182.36 g/mol
21756 atoms

B21756 has a molar mass of 235,182.36 g/mol, made up of 21756 atoms across 1 element: 21756 × B.

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Molar mass

Molar mass235,182.36 g/mol

Total atoms per molecule21756

Distinct elements1

Mass of one molecule3.905295 × 10^-19 g

Molecules per gram2.560626 × 10^18

Composition by mass

B100%

Boron (B × 21756)235,182.36 g/mol, 100%

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Elements in this formula

Boron

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