Recognised as Colour
#B1191B
- #B1191B
- Red
- Dark
- Nearest: Firebrick
#B1191B is a red with RGB values 177, 25, 27 and HSL 359°, 75%, 40%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Firebrick.
Colour values
#B1191B#B1191B
HEX#B1191B
RGBrgb(177, 25, 27)
RGB (0–1)0.6941, 0.098, 0.1059
RGB percentages69.4%, 9.8%, 10.6%
HSLhsl(359.2, 75.2%, 39.6%)
HSV / HSBhsv(359.2, 85.9%, 69.4%)
CMYK0%, 85.9%, 84.7%, 30.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,606,299
CSS custom property--colour: #B1191B;
Brightness & contrast
Relative luminance0.10122WCAG 2.x, 0 is black and 1 is white
Perceived brightness99.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.94:1
Contrast with white6.94:1WCAG normal text: AA
Contrast with black3.02:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#4EE6E4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.94:1WCAG large text: AAA
Contrast with black, large text3.02:1WCAG large text: AA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#19B1AF
Analogous#B11967, #B16319
Triadic#1BB119, #191BB1
Split complementary#19B163, #1967B1
Tetradic#67B119, #19B1AF, #6319B1
Tints, shades & saturation
Channel breakdown
R177
G25
B27
Red177 (69.4%)
Green25 (9.8%)
Blue27 (10.6%)
Hue359.21°
Saturation (HSL)75.25%
Lightness39.61%
Dominant channelRed
Hex per channelR B1 · G 19 · B 1B
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Also reads as
B1191B (chemical formula)
- Formula
- 12,885.52 g/mol
- 1192 atoms
B1191B has a molar mass of 12,885.52 g/mol, made up of 1192 atoms across 1 element: 1192 × B.
Molar mass
Molar mass12,885.52 g/mol
Total atoms per molecule1192
Distinct elements1
Mass of one molecule2.1396909 × 10^-20 g
Molecules per gram4.6735722 × 10^19
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 × 1192)12,885.52 g/mol, 100%
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Elements in this formula
Nerdulate something else
Nothing in mind? Surprise me · today’s page