Recognised as Colour

#FFE661

#FFE661
Yellow
Light
Nearest: Khaki

#FFE661 is a yellow with RGB values 255, 230, 97 and HSL 51°, 100%, 69%. It is a light colour, so black text on it reaches 16.7:1 contrast (AAA for normal text). The nearest named colour is Khaki.

Colour values

#FFE661#FFE661

HEX#FFE661

RGBrgb(255, 230, 97)

RGB (0–1)1, 0.902, 0.3804

RGB percentages100%, 90.2%, 38%

HSLhsl(50.5, 100%, 69%)

HSV / HSBhsv(50.5, 62%, 100%)

CMYK0%, 9.8%, 62%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,770,657

CSS custom property--colour: #FFE661;

Brightness & contrast

Relative luminance0.78717WCAG 2.x, 0 is black and 1 is white

Perceived brightness227.1 of 255ITU-R BT.601 weighting

Light or darkLight

Best text colour on this backgroundBlackcontrast 16.74:1

Contrast with white1.25:1WCAG normal text: Fail

Contrast with black16.74:1WCAG normal text: AAA

Greyscale equivalent#E2E2E2

Inverted#00199E

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#FBE052no red cones; affects about 1% of men; ΔE 4.4 from the original

Deuteranopia#FFE968no green cones; the most common form, about 1% of men; ΔE 2.5 from the original

Tritanopia#FFD6CAno blue cones; rare, and affects men and women equally; ΔE 58 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text1.25:1WCAG large text: Fail

Contrast with black, large text16.74:1WCAG large text: AAA

Named colours

Khaki · ΔE 21.2 Gold · ΔE 22 Goldenrod · ΔE 25.4 Dark khaki · ΔE 32.2 Yellow · ΔE 32.7 Yellow green · ΔE 34.7

Nearest named CSS colourKhaki (#F0E68C)ΔE 21.22, a distinctly different colour

Hue familyyellow

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#617AFF

Analogous#FF9761, #C9FF61

Triadic#61FFE6, #E661FF

Split complementary#61C9FF, #9761FF

Tetradic#61FF97, #617AFF, #FF61C9

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FFFEFA

Lighter +20%#FFF6C7

Lighter +10%#FFEE94

Darker −10%#FFDE2E

Darker −20%#FAD200

Darker −30%#C7A800

Darker −40%#947D00

More saturated +25%#FFE661

Less saturated −25%#EBD875

Channel breakdown

R255

G230

B97

Red255 (100%)

Green230 (90.2%)

Blue97 (38%)

Hue50.51°

Saturation (HSL)100%

Lightness69.02%

Dominant channelRed

Hex per channelR FF · G E6 · B 61

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FFe661 (chemical formula)

Formula
36,932.543 g/mol
662 atoms

FFe661 has a molar mass of 36,932.543 g/mol, made up of 662 atoms across 2 elements: 1 × F, 661 × Fe.

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Molar mass

Molar mass36,932.543 g/mol

Total atoms per molecule662

Distinct elements2

Mass of one molecule6.1327931 × 10^-20 g

Molecules per gram1.6305784 × 10^19

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

F0.1%

Fe99.9%

Fluorine (F)18.998 g/mol, 0.051%

Iron (Fe × 661)36,913.545 g/mol, 99.949%

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Elements in this formula

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