Recognised as Colour
#FEFF28
- #FEFF28
- Yellow
- Light
- Nearest: Yellow
#FEFF28 is a yellow with RGB values 254, 255, 40 and HSL 60°, 100%, 58%. It is a light colour, so black text on it reaches 19.5:1 contrast (AAA for normal text). The nearest named colour is Yellow.
Colour values
#FEFF28#FEFF28
HEX#FEFF28
RGBrgb(254, 255, 40)
RGB (0–1)0.9961, 1, 0.1569
RGB percentages99.6%, 100%, 15.7%
HSLhsl(60.3, 100%, 57.8%)
HSV / HSBhsv(60.3, 84.3%, 100%)
CMYK0.4%, 0%, 84.3%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,711,464
CSS custom property--colour: #FEFF28;
Brightness & contrast
Relative luminance0.92744WCAG 2.x, 0 is black and 1 is white
Perceived brightness240.1 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 19.55:1
Contrast with white1.07:1WCAG normal text: Fail
Contrast with black19.55:1WCAG normal text: AAA
Greyscale equivalent#EFEFEF
Inverted#0100D7
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.07:1WCAG large text: Fail
Contrast with black, large text19.55:1WCAG large text: AAA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#2928FF
Analogous#FF9428, #93FF28
Triadic#28FEFF, #FF28FE
Split complementary#2893FF, #9428FF
Tetradic#28FF95, #2928FF, #FF2893
Tints, shades & saturation
Channel breakdown
R254
G255
B40
Red254 (99.6%)
Green255 (100%)
Blue40 (15.7%)
Hue60.28°
Saturation (HSL)100%
Lightness57.84%
Dominant channelGreen
Hex per channelR FE · G FF · B 28
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Harmonies
Similar named colours
Also reads as
FeFF28 (chemical formula)
- Formula
- 606.787 g/mol
- 30 atoms
FeFF28 has a molar mass of 606.787 g/mol, made up of 30 atoms across 2 elements: 1 × Fe, 29 × F.
Molar mass
Molar mass606.787 g/mol
Total atoms per molecule30
Distinct elements2
Mass of one molecule1.0075935 × 10^-21 g
Molecules per gram9.9246371 × 10^20
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
Fe9.2%
F90.8%
Iron (Fe)55.845 g/mol, 9.203%
Fluorine (F × 29)550.942 g/mol, 90.797%
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