Recognised as Colour

#FFFF3F

#FFFF3F
Yellow
Light
Nearest: Yellow

#FFFF3F is a yellow with RGB values 255, 255, 63 and HSL 60°, 100%, 62%. It is a light colour, so black text on it reaches 19.6:1 contrast (AAA for normal text). The nearest named colour is Yellow.

Colour values

#FFFF3F#FFFF3F

HEX#FFFF3F

RGBrgb(255, 255, 63)

RGB (0–1)1, 1, 0.2471

RGB percentages100%, 100%, 24.7%

HSLhsl(60, 100%, 62.4%)

HSV / HSBhsv(60, 75.3%, 100%)

CMYK0%, 0%, 75.3%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,777,023

CSS custom property--colour: #FFFF3F;

Brightness & contrast

Relative luminance0.93139WCAG 2.x, 0 is black and 1 is white

Perceived brightness241 of 255ITU-R BT.601 weighting

Light or darkLight

Best text colour on this backgroundBlackcontrast 19.63:1

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

Contrast with black19.63:1WCAG normal text: AAA

Greyscale equivalent#F1F1F1

Inverted#0000C0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#FFF401no red cones; affects about 1% of men; ΔE 9.4 from the original

Deuteranopia#FFFA50no green cones; the most common form, about 1% of men; ΔE 7.4 from the original

Tritanopia#FFEFDBno blue cones; rare, and affects men and women equally; ΔE 76.2 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 text19.63:1WCAG large text: AAA

Named colours

Yellow · ΔE 10.2 Gold · ΔE 21.3 Yellow green · ΔE 32.5 Green yellow · ΔE 32.6 Khaki · ΔE 41.6 Goldenrod · ΔE 42.2

Nearest named CSS colourYellow (#FFFF00)ΔE 10.15, a distinctly different colour

Hue familyyellow

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#3F3FFF

Analogous#FF9F3F, #9FFF3F

Triadic#3FFFFF, #FF3FFF

Split complementary#3F9FFF, #9F3FFF

Tetradic#3FFF9F, #3F3FFF, #FF3F9F

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFFFD8

Lighter +20%#FFFFA5

Lighter +10%#FFFF72

Darker −10%#FFFF0C

Darker −20%#D8D800

Darker −30%#A5A500

Darker −40%#727200

More saturated +25%#FFFF3F

Less saturated −25%#E7E757

Channel breakdown

R255

G255

B63

Red255 (100%)

Green255 (100%)

Blue63 (24.7%)

Hue60°

Saturation (HSL)100%

Lightness62.35%

Dominant channelRed and Green

Hex per channelR FF · G FF · B 3F

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FFFF3F (chemical formula)

Formula
132.986 g/mol
7 atoms

FFFF3F has a molar mass of 132.986 g/mol, made up of 7 atoms across 1 element: 7 × F.

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Molar mass

Molar mass132.986 g/mol

Total atoms per molecule7

Distinct elements1

Mass of one molecule2.2082845 × 10^-22 g

Molecules per gram4.5284021 × 10^21

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 × 7)132.986 g/mol, 100%

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Elements in this formula

Fluorine

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