Recognised as Colour
#FF5217
- #FF5217
- Orange
- Dark
- Nearest: Orange red
#FF5217 is a orange with RGB values 255, 82, 23 and HSL 15°, 100%, 55%. It is a dark colour, so black text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Orange red.
Colour values
#FF5217#FF5217
HEX#FF5217
RGBrgb(255, 82, 23)
RGB (0–1)1, 0.3216, 0.0902
RGB percentages100%, 32.2%, 9%
HSLhsl(15.3, 100%, 54.5%)
HSV / HSBhsv(15.3, 91%, 100%)
CMYK0%, 67.8%, 91%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,732,695
CSS custom property--colour: #FF5217;
Brightness & contrast
Relative luminance0.27356WCAG 2.x, 0 is black and 1 is white
Perceived brightness153.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.47:1
Contrast with white3.25:1WCAG normal text: Fail
Contrast with black6.47:1WCAG normal text: AA
Greyscale equivalent#737373
Inverted#00ADE8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.25:1WCAG large text: AA
Contrast with black, large text6.47:1WCAG large text: AAA
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#17C4FF
Analogous#FF1750, #FFC617
Triadic#17FF52, #5217FF
Split complementary#17FFC6, #1750FF
Tetradic#50FF17, #17C4FF, #C617FF
Tints, shades & saturation
Channel breakdown
R255
G82
B23
Red255 (100%)
Green82 (32.2%)
Blue23 (9%)
Hue15.26°
Saturation (HSL)100%
Lightness54.51%
Dominant channelRed
Hex per channelR FF · G 52 · B 17
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Also reads as
FF5217 (chemical formula)
- Formula
- 99,131.564 g/mol
- 5218 atoms
FF5217 has a molar mass of 99,131.564 g/mol, made up of 5218 atoms across 1 element: 5218 × F.
Molar mass
Molar mass99,131.564 g/mol
Total atoms per molecule5218
Distinct elements1
Mass of one molecule1.6461183 × 10^-19 g
Molecules per gram6.0748974 × 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 × 5218)99,131.564 g/mol, 100%
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