Recognised as Colour

#F8FF31

#F8FF31
Yellow
Light
Nearest: Yellow

#F8FF31 is a yellow with RGB values 248, 255, 49 and HSL 62°, 100%, 60%. It is a light colour, so black text on it reaches 19.3:1 contrast (AAA for normal text). The nearest named colour is Yellow.

Colour values

#F8FF31#F8FF31

HEX#F8FF31

RGBrgb(248, 255, 49)

RGB (0–1)0.9725, 1, 0.1922

RGB percentages97.3%, 100%, 19.2%

HSLhsl(62, 100%, 59.6%)

HSV / HSBhsv(62, 80.8%, 100%)

CMYK2.7%, 0%, 80.8%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,318,257

CSS custom property--colour: #F8FF31;

Brightness & contrast

Relative luminance0.91698WCAG 2.x, 0 is black and 1 is white

Perceived brightness238.4 of 255ITU-R BT.601 weighting

Light or darkLight

Best text colour on this backgroundBlackcontrast 19.34:1

Contrast with white1.09:1WCAG normal text: Fail

Contrast with black19.34:1WCAG normal text: AAA

Greyscale equivalent#EFEFEF

Inverted#0700CE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#FFF300no red cones; affects about 1% of men; ΔE 9.6 from the original

Deuteranopia#FFF846no green cones; the most common form, about 1% of men; ΔE 9.7 from the original

Tritanopia#FFEFDBno blue cones; rare, and affects men and women equally; ΔE 80 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text1.09:1WCAG large text: Fail

Contrast with black, large text19.34:1WCAG large text: AAA

Named colours

Yellow · ΔE 7.4 Gold · ΔE 23.8 Green yellow · ΔE 29.7 Yellow green · ΔE 32.3 Lawn green · ΔE 44.9 Chartreuse · ΔE 44.9

Nearest named CSS colourYellow (#FFFF00)ΔE 7.45, clearly different but related

Hue familyyellow

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#3831FF

Analogous#FF9F31, #91FF31

Triadic#31F8FF, #FF31F8

Split complementary#3191FF, #9F31FF

Tetradic#31FF9F, #3831FF, #FF3191

Tints, shades & saturation

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

Lighter +40%#FFFFFD

Lighter +30%#FDFFCA

Lighter +20%#FBFF97

Lighter +10%#FAFF64

Darker −10%#F4FD00

Darker −20%#C3CA00

Darker −30%#929700

Darker −40%#616400

More saturated +25%#F8FF31

Less saturated −25%#E0E54B

Channel breakdown

R248

G255

B49

Red248 (97.3%)

Green255 (100%)

Blue49 (19.2%)

Hue62.04°

Saturation (HSL)100%

Lightness59.61%

Dominant channelGreen

Hex per channelR F8 · G FF · B 31

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F8FF31 (chemical formula)

Formula
759.92 g/mol
40 atoms

F8FF31 has a molar mass of 759.92 g/mol, made up of 40 atoms across 1 element: 40 × F.

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Molar mass

Molar mass759.92 g/mol

Total atoms per molecule40

Distinct elements1

Mass of one molecule1.2618768 × 10^-21 g

Molecules per gram7.9247036 × 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 × 40)759.92 g/mol, 100%

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Elements in this formula

Fluorine

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