Recognised as Colour

#B30300

#B30300
Red
Dark
Nearest: Firebrick

#B30300 is a red with RGB values 179, 3, 0 and HSL 1°, 100%, 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

#B30300#B30300

HEX#B30300

RGBrgb(179, 3, 0)

RGB (0–1)0.702, 0.0118, 0

RGB percentages70.2%, 1.2%, 0%

HSLhsl(1, 100%, 35.1%)

HSV / HSBhsv(1, 100%, 70.2%)

CMYK0%, 98.3%, 100%, 29.8%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,731,712

CSS custom property--colour: #B30300;

Brightness & contrast

Relative luminance0.09649WCAG 2.x, 0 is black and 1 is white

Perceived brightness97.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.17:1

Contrast with white7.17:1WCAG normal text: AAA

Contrast with black2.93:1WCAG normal text: Fail

Greyscale equivalent#282828

Inverted#4CFCFF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4B4100no red cones; affects about 1% of men; ΔE 66.4 from the original

Deuteranopia#716400no green cones; the most common form, about 1% of men; ΔE 65.8 from the original

Tritanopia#C60009no blue cones; rare, and affects men and women equally; ΔE 6.7 from the original

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

Contrast with white, large text7.17:1WCAG large text: AAA

Contrast with black, large text2.93:1WCAG large text: Fail

Named colours

Firebrick · ΔE 14.9 Dark red · ΔE 17 Maroon · ΔE 22.1 Crimson · ΔE 22.7 Brown · ΔE 23.9 Tomato · ΔE 25.7

Nearest named CSS colourFirebrick (#B22222)ΔE 14.93, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00B0B3

Analogous#B30056, #B35C00

Triadic#00B303, #0300B3

Split complementary#00B35C, #0056B3

Tetradic#57B300, #00B0B3, #5D00B3

Tints, shades & saturation

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

Lighter +40%#FF8280

Lighter +30%#FF504D

Lighter +20%#FF1E1A

Lighter +10%#E60400

Darker −10%#800200

Darker −20%#4D0100

Darker −30%#1A0000

Darker −40%#000000

More saturated +25%#B30300

Less saturated −25%#9D1916

Channel breakdown

R179

Red179 (70.2%)

Green3 (1.2%)

Blue0 (0%)

Hue1.01°

Saturation (HSL)100%

Lightness35.1%

Dominant channelRed

Hex per channelR B3 · G 03 · B 00

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B30300 (chemical formula)

Formula
327,543 g/mol
30300 atoms

B30300 has a molar mass of 327,543 g/mol, made up of 30300 atoms across 1 element: 30300 × B.

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Molar mass

Molar mass327,543 g/mol

Total atoms per molecule30300

Distinct elements1

Mass of one molecule5.4389795 × 10^-19 g

Molecules per gram1.8385802 × 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 × 30300)327,543 g/mol, 100%

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Elements in this formula

Boron

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