Recognised as Colour

#B22017

#B22017
Red
Dark
Nearest: Firebrick

#B22017 is a red with RGB values 178, 32, 23 and HSL 3°, 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 Firebrick.

Colour values

#B22017#B22017

HEX#B22017

RGBrgb(178, 32, 23)

RGB (0–1)0.698, 0.1255, 0.0902

RGB percentages69.8%, 12.5%, 9%

HSLhsl(3.5, 77.1%, 39.4%)

HSV / HSBhsv(3.5, 87.1%, 69.8%)

CMYK0%, 82%, 87.1%, 30.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,673,623

CSS custom property--colour: #B22017;

Brightness & contrast

Relative luminance0.1056WCAG 2.x, 0 is black and 1 is white

Perceived brightness100.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.75:1

Contrast with white6.75:1WCAG normal text: AA

Contrast with black3.11:1WCAG normal text: Fail

Greyscale equivalent#3E3E3E

Inverted#4DDFE8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#504713no red cones; affects about 1% of men; ΔE 61 from the original

Deuteranopia#74670Cno green cones; the most common form, about 1% of men; ΔE 60.9 from the original

Tritanopia#C50020no blue cones; rare, and affects men and women equally; ΔE 10.6 from the original

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

Contrast with white, large text6.75:1WCAG large text: AAA

Contrast with black, large text3.11:1WCAG large text: AA

Named colours

Firebrick · ΔE 5.5 Dark red · ΔE 12.1 Brown · ΔE 14.2 Maroon · ΔE 16.4 Crimson · ΔE 19.4 Tomato · ΔE 23.7

Nearest named CSS colourFirebrick (#B22222)ΔE 5.52, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17A9B2

Analogous#B2175B, #B26E17

Triadic#17B220, #2017B2

Split complementary#17B26E, #175CB2

Tetradic#5BB217, #17A9B2, #6E17B2

Tints, shades & saturation

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

Lighter +40%#F3A7A2

Lighter +30%#ED7C75

Lighter +20%#E75148

Lighter +10%#DF281D

Darker −10%#851811

Darker −20%#58100B

Darker −30%#2B0805

Darker −40%#000000

More saturated +25%#C90C00

Less saturated −25%#993630

Channel breakdown

R178

G32

B23

Red178 (69.8%)

Green32 (12.5%)

Blue23 (9%)

Hue3.48°

Saturation (HSL)77.11%

Lightness39.41%

Dominant channelRed

Hex per channelR B2 · G 20 · B 17

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B22017 (chemical formula)

Formula
238,003.77 g/mol
22017 atoms

B22017 has a molar mass of 238,003.77 g/mol, made up of 22017 atoms across 1 element: 22017 × B.

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Molar mass

Molar mass238,003.77 g/mol

Total atoms per molecule22017

Distinct elements1

Mass of one molecule3.9521456 × 10^-19 g

Molecules per gram2.5302712 × 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 × 22017)238,003.77 g/mol, 100%

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Elements in this formula

Boron

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