Recognised as Colour
#B30203
- #B30203
- Red
- Dark
- Nearest: Firebrick
#B30203 is a red with RGB values 179, 2, 3 and HSL 360°, 98%, 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
#B30203#B30203
HEX#B30203
RGBrgb(179, 2, 3)
RGB (0–1)0.702, 0.0078, 0.0118
RGB percentages70.2%, 0.8%, 1.2%
HSLhsl(359.7, 97.8%, 35.5%)
HSV / HSBhsv(359.7, 98.9%, 70.2%)
CMYK0%, 98.9%, 98.3%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer11,731,459
CSS custom property--colour: #B30203;
Brightness & contrast
Relative luminance0.09634WCAG 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 7.18:1
Contrast with white7.18:1WCAG normal text: AAA
Contrast with black2.93:1WCAG normal text: Fail
Greyscale equivalent#282828
Inverted#4CFDFC
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.18:1WCAG large text: AAA
Contrast with black, large text2.93:1WCAG large text: Fail
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#02B3B2
Analogous#B3025B, #B35A02
Triadic#03B302, #0203B3
Split complementary#02B35A, #025BB3
Tetradic#5BB302, #02B3B2, #5A02B3
Tints, shades & saturation
Channel breakdown
R179
G2
B3
Red179 (70.2%)
Green2 (0.8%)
Blue3 (1.2%)
Hue359.66°
Saturation (HSL)97.79%
Lightness35.49%
Dominant channelRed
Hex per channelR B3 · G 02 · B 03
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Also reads as
B30203 (chemical formula)
- Formula
- 326,494.43 g/mol
- 30203 atoms
B30203 has a molar mass of 326,494.43 g/mol, made up of 30203 atoms across 1 element: 30203 × B.
Molar mass
Molar mass326,494.43 g/mol
Total atoms per molecule30203
Distinct elements1
Mass of one molecule5.4215676 × 10^-19 g
Molecules per gram1.844485 × 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 × 30203)326,494.43 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