Recognised as Colour

#B10B4B

#B10B4B
Red
Dark
Nearest: Brown

#B10B4B is a red with RGB values 177, 11, 75 and HSL 337°, 88%, 37%. It is a dark colour, so white text on it reaches 7:1 contrast (AA for normal text). The nearest named colour is Brown.

Colour values

#B10B4B#B10B4B

HEX#B10B4B

RGBrgb(177, 11, 75)

RGB (0–1)0.6941, 0.0431, 0.2941

RGB percentages69.4%, 4.3%, 29.4%

HSLhsl(336.9, 88.3%, 36.9%)

HSV / HSBhsv(336.9, 93.8%, 69.4%)

CMYK0%, 93.8%, 57.6%, 30.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,602,763

CSS custom property--colour: #B10B4B;

Brightness & contrast

Relative luminance0.10094WCAG 2.x, 0 is black and 1 is white

Perceived brightness100.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.96:1

Contrast with white6.96:1WCAG normal text: AA

Contrast with black3.02:1WCAG normal text: Fail

Greyscale equivalent#333333

Inverted#4EF4B4

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#43454Cno red cones; affects about 1% of men; ΔE 63.8 from the original

Deuteranopia#6B6447no green cones; the most common form, about 1% of men; ΔE 64.8 from the original

Tritanopia#C2002Dno blue cones; rare, and affects men and women equally; ΔE 23.5 from the original

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

Contrast with white, large text6.96:1WCAG large text: AAA

Contrast with black, large text3.02:1WCAG large text: AA

Named colours

Brown · ΔE 23.3 Indian red · ΔE 25.8 Crimson · ΔE 26 Firebrick · ΔE 27.5 Medium violet red · ΔE 28.3 Pale violetred · ΔE 29.9

Nearest named CSS colourBrown (#A52A2A)ΔE 23.31, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0BB171

Analogous#B10B9E, #B11E0B

Triadic#4BB10B, #0B4BB1

Split complementary#0BB11E, #0B9EB1

Tetradic#9EB10B, #0BB171, #1E0BB1

Tints, shades & saturation

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

Lighter +40%#F890B8

Lighter +30%#F56099

Lighter +20%#F2307B

Lighter +10%#E10E5F

Darker −10%#810837

Darker −20%#510522

Darker −30%#21020E

Darker −40%#000000

More saturated +25%#BC0048

Less saturated −25%#9A2250

Channel breakdown

R177

G11

B75

Red177 (69.4%)

Green11 (4.3%)

Blue75 (29.4%)

Hue336.87°

Saturation (HSL)88.3%

Lightness36.86%

Dominant channelRed

Hex per channelR B1 · G 0B · B 4B

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B10B4B (chemical formula)

Formula
162.15 g/mol
15 atoms

B10B4B has a molar mass of 162.15 g/mol, made up of 15 atoms across 1 element: 15 × B.

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Molar mass

Molar mass162.15 g/mol

Total atoms per molecule15

Distinct elements1

Mass of one molecule2.6925641 × 10^-22 g

Molecules per gram3.713932 × 10^21

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 × 15)162.15 g/mol, 100%

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Elements in this formula

Boron

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