Recognised as Colour
#FF9904
- #FF9904
- Orange
- Dark
- Nearest: Orange
#FF9904 is a orange with RGB values 255, 153, 4 and HSL 36°, 100%, 51%. It is a dark colour, so black text on it reaches 9.8:1 contrast (AAA for normal text). The nearest named colour is Orange.
Colour values
#FF9904#FF9904
HEX#FF9904
RGBrgb(255, 153, 4)
RGB (0–1)1, 0.6, 0.0157
RGB percentages100%, 60%, 1.6%
HSLhsl(35.6, 100%, 50.8%)
HSV / HSBhsv(35.6, 98.4%, 100%)
CMYK0%, 40%, 98.4%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,750,852
CSS custom property--colour: #FF9904;
Brightness & contrast
Relative luminance0.44051WCAG 2.x, 0 is black and 1 is white
Perceived brightness182.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.81:1
Contrast with white2.14:1WCAG normal text: Fail
Contrast with black9.81:1WCAG normal text: AAA
Greyscale equivalent#A4A4A4
Inverted#0066FB
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.14:1WCAG large text: Fail
Contrast with black, large text9.81:1WCAG large text: AAA
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#046AFF
Analogous#FF1B04, #E8FF04
Triadic#04FF99, #9904FF
Split complementary#04E8FF, #1B04FF
Tetradic#04FF1B, #046AFF, #FF04E8
Tints, shades & saturation
Channel breakdown
R255
G153
B4
Red255 (100%)
Green153 (60%)
Blue4 (1.6%)
Hue35.62°
Saturation (HSL)100%
Lightness50.78%
Dominant channelRed
Hex per channelR FF · G 99 · B 04
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Also reads as
FF9904 (chemical formula)
- Formula
- 188,175.19 g/mol
- 9905 atoms
FF9904 has a molar mass of 188,175.19 g/mol, made up of 9905 atoms across 1 element: 9905 × F.
Molar mass
Molar mass188,175.19 g/mol
Total atoms per molecule9905
Distinct elements1
Mass of one molecule3.1247225 × 10^-19 g
Molecules per gram3.2002841 × 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 × 9905)188,175.19 g/mol, 100%
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