Recognised as Colour

#FFFF55

#FFFF55
Yellow
Light
Nearest: Yellow

#FFFF55 is a yellow with RGB values 255, 255, 85 and HSL 60°, 100%, 67%. It is a light colour, so black text on it reaches 19.7:1 contrast (AAA for normal text). The nearest named colour is Yellow.

Colour values

#FFFF55#FFFF55

HEX#FFFF55

HEX (short)#FF5

RGBrgb(255, 255, 85)

RGB (0–1)1, 1, 0.3333

RGB percentages100%, 100%, 33.3%

HSLhsl(60, 100%, 66.7%)

HSV / HSBhsv(60, 66.7%, 100%)

CMYK0%, 0%, 66.7%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,777,045

CSS custom property--colour: #FFFF55;

Brightness & contrast

Relative luminance0.93436WCAG 2.x, 0 is black and 1 is white

Perceived brightness241.7 of 255ITU-R BT.601 weighting

Light or darkLight

Best text colour on this backgroundBlackcontrast 19.69:1

Contrast with white1.07:1WCAG normal text: Fail

Contrast with black19.69:1WCAG normal text: AAA

Greyscale equivalent#F3F3F3

Inverted#0000AA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#FFF53Bno red cones; affects about 1% of men; ΔE 7.5 from the original

Deuteranopia#FFFA61no green cones; the most common form, about 1% of men; ΔE 6.7 from the original

Tritanopia#FFEFDDno blue cones; rare, and affects men and women equally; ΔE 70.2 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text1.07:1WCAG large text: Fail

Contrast with black, large text19.69:1WCAG large text: AAA

Named colours

Yellow · ΔE 17.3 Gold · ΔE 22.6 Yellow green · ΔE 29.9 Green yellow · ΔE 33.8 Khaki · ΔE 34.7 Goldenrod · ΔE 39.5

Nearest named CSS colourYellow (#FFFF00)ΔE 17.3, a distinctly different colour

Hue familyyellow

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#5555FF

Analogous#FFAA55, #AAFF55

Triadic#55FFFF, #FF55FF

Split complementary#55AAFF, #AA55FF

Tetradic#55FFAA, #5555FF, #FF55AA

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#FFFFFF

Lighter +30%#FFFFEE

Lighter +20%#FFFFBB

Lighter +10%#FFFF88

Darker −10%#FFFF22

Darker −20%#EEEE00

Darker −30%#BBBB00

Darker −40%#888800

More saturated +25%#FFFF55

Less saturated −25%#EAEA6A

Channel breakdown

R255

G255

B85

Red255 (100%)

Green255 (100%)

Blue85 (33.3%)

Hue60°

Saturation (HSL)100%

Lightness66.67%

Dominant channelRed and Green

Hex per channelR FF · G FF · B 55

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FFFF55 (chemical formula)

Formula
1,101.884 g/mol
58 atoms

FFFF55 has a molar mass of 1,101.884 g/mol, made up of 58 atoms across 1 element: 58 × F.

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Molar mass

Molar mass1,101.884 g/mol

Total atoms per molecule58

Distinct elements1

Mass of one molecule1.8297214 × 10^-21 g

Molecules per gram5.4653128 × 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

F100%

Fluorine (F × 58)1,101.884 g/mol, 100%

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Elements in this formula

Fluorine

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