Recognised as Colour
#FB3823
- #FB3823
- Red
- Dark
- Nearest: Orange red
#FB3823 is a red with RGB values 251, 56, 35 and HSL 6°, 96%, 56%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Orange red.
Colour values
#FB3823#FB3823
HEX#FB3823
RGBrgb(251, 56, 35)
RGB (0–1)0.9843, 0.2196, 0.1373
RGB percentages98.4%, 22%, 13.7%
HSLhsl(5.8, 96.4%, 56.1%)
HSV / HSBhsv(5.8, 86.1%, 98.4%)
CMYK0%, 77.7%, 86.1%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,463,907
CSS custom property--colour: #FB3823;
Brightness & contrast
Relative luminance0.23459WCAG 2.x, 0 is black and 1 is white
Perceived brightness144.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.69:1
Contrast with white3.69:1WCAG normal text: Fail
Contrast with black5.69:1WCAG normal text: AA
Greyscale equivalent#606060
Inverted#04C7DC
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.69:1WCAG large text: AA
Contrast with black, large text5.69:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#23E6FB
Analogous#FB237A, #FBA423
Triadic#23FB38, #3823FB
Split complementary#23FBA4, #237AFB
Tetradic#7AFB23, #23E6FB, #A423FB
Tints, shades & saturation
Channel breakdown
R251
G56
B35
Red251 (98.4%)
Green56 (22%)
Blue35 (13.7%)
Hue5.83°
Saturation (HSL)96.43%
Lightness56.08%
Dominant channelRed
Hex per channelR FB · G 38 · B 23
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Also reads as
FB3823 (chemical formula)
- Formula
- 41,345.628 g/mol
- 3824 atoms
FB3823 has a molar mass of 41,345.628 g/mol, made up of 3824 atoms across 2 elements: 1 × F, 3823 × B.
Molar mass
Molar mass41,345.628 g/mol
Total atoms per molecule3824
Distinct elements2
Mass of one molecule6.8656031 × 10^-20 g
Molecules per gram1.4565363 × 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
F0%
B100%
Fluorine (F)18.998 g/mol, 0.046%
Boron (B × 3823)41,326.63 g/mol, 99.954%
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