Recognised as Colour

#B11101

#B11101
Red
Dark
Nearest: Firebrick

#B11101 is a red with RGB values 177, 17, 1 and HSL 5°, 99%, 35%. It is a dark colour, so white text on it reaches 7.1:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#B11101#B11101

HEX#B11101

RGBrgb(177, 17, 1)

RGB (0–1)0.6941, 0.0667, 0.0039

RGB percentages69.4%, 6.7%, 0.4%

HSLhsl(5.5, 98.9%, 34.9%)

HSV / HSBhsv(5.5, 99.4%, 69.4%)

CMYK0%, 90.4%, 99.4%, 30.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,604,225

CSS custom property--colour: #B11101;

Brightness & contrast

Relative luminance0.0975WCAG 2.x, 0 is black and 1 is white

Perceived brightness97.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.12:1

Contrast with white7.12:1WCAG normal text: AAA

Contrast with black2.95:1WCAG normal text: Fail

Greyscale equivalent#323232

Inverted#4EEEFE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4C4200no red cones; affects about 1% of men; ΔE 64 from the original

Deuteranopia#716400no green cones; the most common form, about 1% of men; ΔE 63.5 from the original

Tritanopia#C40012no blue cones; rare, and affects men and women equally; ΔE 8.3 from the original

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

Contrast with white, large text7.12:1WCAG large text: AAA

Contrast with black, large text2.95:1WCAG large text: Fail

Named colours

Firebrick · ΔE 13.7 Dark red · ΔE 15.5 Maroon · ΔE 20.5 Brown · ΔE 22.3 Crimson · ΔE 23.3 Tomato · ΔE 25.2

Nearest named CSS colourFirebrick (#B22222)ΔE 13.71, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#01A1B1

Analogous#B10149, #B16901

Triadic#01B111, #1101B1

Split complementary#01B169, #0149B1

Tetradic#49B101, #01A1B1, #6901B1

Tints, shades & saturation

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

Lighter +40%#FE8B80

Lighter +30%#FE5D4D

Lighter +20%#FE2F1A

Lighter +10%#E41601

Darker −10%#7E0C01

Darker −20%#4C0700

Darker −30%#190200

Darker −40%#000000

More saturated +25%#B21000

Less saturated −25%#9B2317

Channel breakdown

R177

G17

Red177 (69.4%)

Green17 (6.7%)

Blue1 (0.4%)

Hue5.45°

Saturation (HSL)98.88%

Lightness34.9%

Dominant channelRed

Hex per channelR B1 · G 11 · B 01

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B11101 (chemical formula)

Formula
120,001.81 g/mol
11101 atoms

B11101 has a molar mass of 120,001.81 g/mol, made up of 11101 atoms across 1 element: 11101 × B.

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Molar mass

Molar mass120,001.81 g/mol

Total atoms per molecule11101

Distinct elements1

Mass of one molecule1.9926769 × 10^-19 g

Molecules per gram5.0183749 × 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 × 11101)120,001.81 g/mol, 100%

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Elements in this formula

Boron

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