Recognised as Colour

#B90803

#B90803
Red
Dark
Nearest: Firebrick

#B90803 is a red with RGB values 185, 8, 3 and HSL 2°, 97%, 37%. It is a dark colour, so white text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#B90803#B90803

HEX#B90803

RGBrgb(185, 8, 3)

RGB (0–1)0.7255, 0.0314, 0.0118

RGB percentages72.5%, 3.1%, 1.2%

HSLhsl(1.6, 96.8%, 36.9%)

HSV / HSBhsv(1.6, 98.4%, 72.5%)

CMYK0%, 95.7%, 98.4%, 27.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,126,211

CSS custom property--colour: #B90803;

Brightness & contrast

Relative luminance0.10495WCAG 2.x, 0 is black and 1 is white

Perceived brightness101.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.78:1

Contrast with white6.78:1WCAG normal text: AA

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

Greyscale equivalent#2D2D2D

Inverted#46F7FC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4E4400no red cones; affects about 1% of men; ΔE 67.4 from the original

Deuteranopia#766800no green cones; the most common form, about 1% of men; ΔE 66.6 from the original

Tritanopia#CD000Eno blue cones; rare, and affects men and women equally; ΔE 7.3 from the original

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

Contrast with white, large text6.78:1WCAG large text: AAA

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

Named colours

Firebrick · ΔE 15.4 Dark red · ΔE 18.6 Crimson · ΔE 21.8 Maroon · ΔE 23.6 Tomato · ΔE 24.4 Brown · ΔE 24.6

Nearest named CSS colourFirebrick (#B22222)ΔE 15.38, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#03B4B9

Analogous#B90359, #B96303

Triadic#03B908, #0803B9

Split complementary#03B963, #0359B9

Tetradic#59B903, #03B4B9, #6303B9

Tints, shades & saturation

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

Lighter +40%#FD8E8B

Lighter +30%#FC5D59

Lighter +20%#FB2C27

Lighter +10%#EB0A04

Darker −10%#870602

Darker −20%#550401

Darker −30%#220101

Darker −40%#000000

More saturated +25%#BC0500

Less saturated −25%#A21E1A

Channel breakdown

R185

Red185 (72.5%)

Green8 (3.1%)

Blue3 (1.2%)

Hue1.65°

Saturation (HSL)96.81%

Lightness36.86%

Dominant channelRed

Hex per channelR B9 · G 08 · B 03

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B90803 (chemical formula)

Formula
981,580.43 g/mol
90803 atoms

B90803 has a molar mass of 981,580.43 g/mol, made up of 90803 atoms across 1 element: 90803 × B.

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Molar mass

Molar mass981,580.43 g/mol

Total atoms per molecule90803

Distinct elements1

Mass of one molecule1.6299527 × 10^-18 g

Molecules per gram6.1351475 × 10^17

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 × 90803)981,580.43 g/mol, 100%

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Elements in this formula

Boron

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