Recognised as Colour

#B11550

#B11550
Red
Dark
Nearest: Brown

#B11550 is a red with RGB values 177, 21, 80 and HSL 337°, 79%, 39%. It is a dark colour, so white text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Brown.

Colour values

#B11550#B11550

HEX#B11550

RGBrgb(177, 21, 80)

RGB (0–1)0.6941, 0.0824, 0.3137

RGB percentages69.4%, 8.2%, 31.4%

HSLhsl(337.3, 78.8%, 38.8%)

HSV / HSBhsv(337.3, 88.1%, 69.4%)

CMYK0%, 88.1%, 54.8%, 30.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,605,328

CSS custom property--colour: #B11550;

Brightness & contrast

Relative luminance0.10463WCAG 2.x, 0 is black and 1 is white

Perceived brightness101.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.79:1

Contrast with white6.79:1WCAG normal text: AA

Contrast with black3.09:1WCAG normal text: Fail

Greyscale equivalent#3A3A3A

Inverted#4EEAAF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#444851no red cones; affects about 1% of men; ΔE 62.7 from the original

Deuteranopia#6C664Cno green cones; the most common form, about 1% of men; ΔE 63.7 from the original

Tritanopia#C20032no blue cones; rare, and affects men and women equally; ΔE 23.1 from the original

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

Contrast with white, large text6.79:1WCAG large text: AAA

Contrast with black, large text3.09:1WCAG large text: AA

Named colours

Brown · ΔE 24.8 Indian red · ΔE 25.7 Medium violet red · ΔE 26.5 Pale violetred · ΔE 28 Crimson · ΔE 28.2 Firebrick · ΔE 29.5

Nearest named CSS colourBrown (#A52A2A)ΔE 24.75, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#15B176

Analogous#B1159E, #B12815

Triadic#50B115, #1550B1

Split complementary#15B128, #159EB1

Tetradic#9EB115, #15B176, #2815B1

Tints, shades & saturation

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

Lighter +40%#F49EBF

Lighter +30%#EE71A0

Lighter +20%#E94382

Lighter +10%#DF1A65

Darker −10%#83103B

Darker −20%#560A27

Darker −30%#280512

Darker −40%#000000

More saturated +25%#C6004B

Less saturated −25%#982E56

Channel breakdown

R177

G21

B80

Red177 (69.4%)

Green21 (8.2%)

Blue80 (31.4%)

Hue337.31°

Saturation (HSL)78.79%

Lightness38.82%

Dominant channelRed

Hex per channelR B1 · G 15 · B 50

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B11550 (chemical formula)

Formula
124,855.5 g/mol
11550 atoms

B11550 has a molar mass of 124,855.5 g/mol, made up of 11550 atoms across 1 element: 11550 × B.

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Molar mass

Molar mass124,855.5 g/mol

Total atoms per molecule11550

Distinct elements1

Mass of one molecule2.0732744 × 10^-19 g

Molecules per gram4.8232883 × 10^18

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

B100%

Boron (B × 11550)124,855.5 g/mol, 100%

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Elements in this formula

Boron

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