Recognised as Colour
#F55501
- #F55501
- Orange
- Dark
- Nearest: Orange red
#F55501 is a orange with RGB values 245, 85, 1 and HSL 21°, 99%, 48%. It is a dark colour, so black text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Orange red.
Colour values
#F55501#F55501
HEX#F55501
RGBrgb(245, 85, 1)
RGB (0–1)0.9608, 0.3333, 0.0039
RGB percentages96.1%, 33.3%, 0.4%
HSLhsl(20.7, 99.2%, 48.2%)
HSV / HSBhsv(20.7, 99.6%, 96.1%)
CMYK0%, 65.3%, 99.6%, 3.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,078,081
CSS custom property--colour: #F55501;
Brightness & contrast
Relative luminance0.25912WCAG 2.x, 0 is black and 1 is white
Perceived brightness149 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.18:1
Contrast with white3.4:1WCAG normal text: Fail
Contrast with black6.18:1WCAG normal text: AA
Greyscale equivalent#717171
Inverted#0AAAFE
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.4:1WCAG large text: AA
Contrast with black, large text6.18:1WCAG large text: AAA
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#01A1F5
Analogous#F50127, #F5CF01
Triadic#01F555, #5501F5
Split complementary#01F5CF, #0127F5
Tetradic#27F501, #01A1F5, #CF01F5
Tints, shades & saturation
Channel breakdown
R245
G85
B1
Red245 (96.1%)
Green85 (33.3%)
Blue1 (0.4%)
Hue20.66°
Saturation (HSL)99.19%
Lightness48.24%
Dominant channelRed
Hex per channelR F5 · G 55 · B 01
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Also reads as
F55501 (chemical formula)
- Formula
- 1,054,407.998 g/mol
- 55501 atoms
F55501 has a molar mass of 1,054,407.998 g/mol, made up of 55501 atoms across 1 element: 55501 × F.
Molar mass
Molar mass1,054,407.998 g/mol
Total atoms per molecule55501
Distinct elements1
Mass of one molecule1.7508857 × 10^-18 g
Molecules per gram5.7113952 × 10^17
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 × 55501)1,054,407.998 g/mol, 100%
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