Recognised as Colour

#B10220

#B10220
Red
Dark
Nearest: Firebrick

#B10220 is a red with RGB values 177, 2, 32 and HSL 350°, 98%, 35%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#B10220#B10220

HEX#B10220

RGBrgb(177, 2, 32)

RGB (0–1)0.6941, 0.0078, 0.1255

RGB percentages69.4%, 0.8%, 12.5%

HSLhsl(349.7, 97.8%, 35.1%)

HSV / HSBhsv(349.7, 98.9%, 69.4%)

CMYK0%, 98.9%, 81.9%, 30.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,600,416

CSS custom property--colour: #B10220;

Brightness & contrast

Relative luminance0.09495WCAG 2.x, 0 is black and 1 is white

Perceived brightness97.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.24:1

Contrast with white7.24:1WCAG normal text: AAA

Contrast with black2.9:1WCAG normal text: Fail

Greyscale equivalent#292929

Inverted#4EFDDF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#48411Fno red cones; affects about 1% of men; ΔE 66 from the original

Deuteranopia#6F6317no green cones; the most common form, about 1% of men; ΔE 65.8 from the original

Tritanopia#C40014no blue cones; rare, and affects men and women equally; ΔE 12.8 from the original

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

Contrast with white, large text7.24:1WCAG large text: AAA

Contrast with black, large text2.9:1WCAG large text: Fail

Named colours

Firebrick · ΔE 5.8 Brown · ΔE 13 Dark red · ΔE 14.3 Crimson · ΔE 14.3 Maroon · ΔE 17.5 Indian red · ΔE 27.3

Nearest named CSS colourFirebrick (#B22222)ΔE 5.83, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#02B193

Analogous#B10277, #B13C02

Triadic#20B102, #0220B1

Split complementary#02B13C, #0277B1

Tetradic#77B102, #02B193, #3C02B1

Tints, shades & saturation

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

Lighter +40%#FE8197

Lighter +30%#FD4F6D

Lighter +20%#FC1D43

Lighter +10%#E30329

Darker −10%#7F0117

Darker −20%#4C010E

Darker −30%#1A0005

Darker −40%#000000

More saturated +25%#B3001F

Less saturated −25%#9B182F

Channel breakdown

R177

B32

Red177 (69.4%)

Green2 (0.8%)

Blue32 (12.5%)

Hue349.71°

Saturation (HSL)97.77%

Lightness35.1%

Dominant channelRed

Hex per channelR B1 · G 02 · B 20

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B10220 (chemical formula)

Formula
110,478.2 g/mol
10220 atoms

B10220 has a molar mass of 110,478.2 g/mol, made up of 10220 atoms across 1 element: 10220 × B.

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Molar mass

Molar mass110,478.2 g/mol

Total atoms per molecule10220

Distinct elements1

Mass of one molecule1.8345337 × 10^-19 g

Molecules per gram5.4509765 × 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 × 10220)110,478.2 g/mol, 100%

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Elements in this formula

Boron

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