Recognised as Colour
#B30807
- #B30807
- Red
- Dark
- Nearest: Firebrick
#B30807 is a red with RGB values 179, 8, 7 and HSL 0°, 92%, 36%. It is a dark colour, so white text on it reaches 7.1:1 contrast (AAA for normal text). The nearest named colour is Firebrick.
Colour values
#B30807#B30807
HEX#B30807
RGBrgb(179, 8, 7)
RGB (0–1)0.702, 0.0314, 0.0275
RGB percentages70.2%, 3.1%, 2.7%
HSLhsl(0.3, 92.5%, 36.5%)
HSV / HSBhsv(0.3, 96.1%, 70.2%)
CMYK0%, 95.5%, 96.1%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,732,999
CSS custom property--colour: #B30807;
Brightness & contrast
Relative luminance0.09773WCAG 2.x, 0 is black and 1 is white
Perceived brightness98.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.11:1
Contrast with white7.11:1WCAG normal text: AAA
Contrast with black2.95:1WCAG normal text: Fail
Greyscale equivalent#2C2C2C
Inverted#4CF7F8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.11:1WCAG large text: AAA
Contrast with black, large text2.95:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#07B2B3
Analogous#B3075C, #B35E07
Triadic#07B308, #0807B3
Split complementary#07B35E, #075CB3
Tetradic#5CB307, #07B2B3, #5E07B3
Tints, shades & saturation
Channel breakdown
R179
G8
B7
Red179 (70.2%)
Green8 (3.1%)
Blue7 (2.7%)
Hue0.35°
Saturation (HSL)92.47%
Lightness36.47%
Dominant channelRed
Hex per channelR B3 · G 08 · B 07
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Also reads as
B30807 (chemical formula)
- Formula
- 333,023.67 g/mol
- 30807 atoms
B30807 has a molar mass of 333,023.67 g/mol, made up of 30807 atoms across 1 element: 30807 × B.
Molar mass
Molar mass333,023.67 g/mol
Total atoms per molecule30807
Distinct elements1
Mass of one molecule5.5299881 × 10^-19 g
Molecules per gram1.8083221 × 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 × 30807)333,023.67 g/mol, 100%
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