Recognised as Colour
#F5382B
- #F5382B
- Red
- Dark
- Nearest: Tomato
#F5382B is a red with RGB values 245, 56, 43 and HSL 4°, 91%, 56%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Tomato.
Colour values
#F5382B#F5382B
HEX#F5382B
RGBrgb(245, 56, 43)
RGB (0–1)0.9608, 0.2196, 0.1686
RGB percentages96.1%, 22%, 16.9%
HSLhsl(3.9, 91%, 56.5%)
HSV / HSBhsv(3.9, 82.4%, 96.1%)
CMYK0%, 77.1%, 82.4%, 3.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,070,699
CSS custom property--colour: #F5382B;
Brightness & contrast
Relative luminance0.22415WCAG 2.x, 0 is black and 1 is white
Perceived brightness141.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.48:1
Contrast with white3.83:1WCAG normal text: Fail
Contrast with black5.48:1WCAG normal text: AA
Greyscale equivalent#5F5F5F
Inverted#0AC7D4
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.83:1WCAG large text: AA
Contrast with black, large text5.48:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#2BE8F5
Analogous#F52B83, #F59D2B
Triadic#2BF538, #382BF5
Split complementary#2BF59D, #2B83F5
Tetradic#83F52B, #2BE8F5, #9D2BF5
Tints, shades & saturation
Channel breakdown
R245
G56
B43
Red245 (96.1%)
Green56 (22%)
Blue43 (16.9%)
Hue3.86°
Saturation (HSL)90.99%
Lightness56.47%
Dominant channelRed
Hex per channelR F5 · G 38 · B 2B
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Also reads as
F5382B (chemical formula)
- Formula
- 102,258.046 g/mol
- 5383 atoms
F5382B has a molar mass of 102,258.046 g/mol, made up of 5383 atoms across 2 elements: 5382 × F, 1 × B.
Molar mass
Molar mass102,258.046 g/mol
Total atoms per molecule5383
Distinct elements2
Mass of one molecule1.6980348 × 10^-19 g
Molecules per gram5.8891608 × 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
F100%
B0%
Fluorine (F × 5382)102,247.236 g/mol, 99.989%
Boron (B)10.81 g/mol, 0.011%
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