Recognised as Colour

#B91900

#B91900
Red
Dark
Nearest: Firebrick

#B91900 is a red with RGB values 185, 25, 0 and HSL 8°, 100%, 36%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#B91900#B91900

HEX#B91900

RGBrgb(185, 25, 0)

RGB (0–1)0.7255, 0.098, 0

RGB percentages72.5%, 9.8%, 0%

HSLhsl(8.1, 100%, 36.3%)

HSV / HSBhsv(8.1, 100%, 72.5%)

CMYK0%, 86.5%, 100%, 27.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer12,130,560

CSS custom property--colour: #B91900;

Brightness & contrast

Relative luminance0.1101WCAG 2.x, 0 is black and 1 is white

Perceived brightness103 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.56:1

Contrast with white6.56:1WCAG normal text: AA

Contrast with black3.2:1WCAG normal text: Fail

Greyscale equivalent#393939

Inverted#46E6FF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#524700no red cones; affects about 1% of men; ΔE 64.7 from the original

Deuteranopia#786900no green cones; the most common form, about 1% of men; ΔE 63.7 from the original

Tritanopia#CD0018no 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 text6.56:1WCAG large text: AAA

Contrast with black, large text3.2:1WCAG large text: AA

Named colours

Firebrick · ΔE 16 Dark red · ΔE 18.6 Maroon · ΔE 23.7 Tomato · ΔE 23.7 Crimson · ΔE 23.9 Brown · ΔE 24.8

Nearest named CSS colourFirebrick (#B22222)ΔE 16.01, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00A0B9

Analogous#B90044, #B97600

Triadic#00B919, #1900B9

Split complementary#00B976, #0043B9

Tetradic#43B900, #00A0B9, #7600B9

Tints, shades & saturation

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

Lighter +40%#FF9686

Lighter +30%#FF6A53

Lighter +20%#FF3E20

Lighter +10%#EC2000

Darker −10%#861200

Darker −20%#530B00

Darker −30%#200400

Darker −40%#000000

More saturated +25%#B91900

Less saturated −25%#A22A17

Channel breakdown

R185

G25

Red185 (72.5%)

Green25 (9.8%)

Blue0 (0%)

Hue8.11°

Saturation (HSL)100%

Lightness36.27%

Dominant channelRed

Hex per channelR B9 · G 19 · B 00

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B91900 (chemical formula)

Formula
993,439 g/mol
91900 atoms

B91900 has a molar mass of 993,439 g/mol, made up of 91900 atoms across 1 element: 91900 × B.

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Molar mass

Molar mass993,439 g/mol

Total atoms per molecule91900

Distinct elements1

Mass of one molecule1.6496443 × 10^-18 g

Molecules per gram6.061913 × 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 × 91900)993,439 g/mol, 100%

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Elements in this formula

Boron

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