Recognised as Colour
#FF5339
- #FF5339
- Red
- Dark
- Nearest: Tomato
#FF5339 is a red with RGB values 255, 83, 57 and HSL 8°, 100%, 61%. It is a dark colour, so black text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Tomato.
Colour values
#FF5339#FF5339
HEX#FF5339
RGBrgb(255, 83, 57)
RGB (0–1)1, 0.3255, 0.2235
RGB percentages100%, 32.5%, 22.4%
HSLhsl(7.9, 100%, 61.2%)
HSV / HSBhsv(7.9, 77.6%, 100%)
CMYK0%, 67.5%, 77.6%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,732,985
CSS custom property--colour: #FF5339;
Brightness & contrast
Relative luminance0.27742WCAG 2.x, 0 is black and 1 is white
Perceived brightness154.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.55:1
Contrast with white3.21:1WCAG normal text: Fail
Contrast with black6.55:1WCAG normal text: AA
Greyscale equivalent#767676
Inverted#00ACC6
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.21:1WCAG large text: AA
Contrast with black, large text6.55:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#39E5FF
Analogous#FF3982, #FFB639
Triadic#39FF53, #5339FF
Split complementary#39FFB6, #3982FF
Tetradic#82FF39, #39E5FF, #B639FF
Tints, shades & saturation
Channel breakdown
R255
G83
B57
Red255 (100%)
Green83 (32.5%)
Blue57 (22.4%)
Hue7.88°
Saturation (HSL)100%
Lightness61.18%
Dominant channelRed
Hex per channelR FF · G 53 · B 39
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Also reads as
FF5339 (chemical formula)
- Formula
- 101,449.32 g/mol
- 5340 atoms
FF5339 has a molar mass of 101,449.32 g/mol, made up of 5340 atoms across 1 element: 5340 × F.
Molar mass
Molar mass101,449.32 g/mol
Total atoms per molecule5340
Distinct elements1
Mass of one molecule1.6846056 × 10^-19 g
Molecules per gram5.9361076 × 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%
Fluorine (F × 5340)101,449.32 g/mol, 100%
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