Recognised as Colour

#FBF221

#FBF221
Yellow
Light
Nearest: Yellow

#FBF221 is a yellow with RGB values 251, 242, 33 and HSL 58°, 96%, 56%. It is a light colour, so black text on it reaches 17.8:1 contrast (AAA for normal text). The nearest named colour is Yellow.

Colour values

#FBF221#FBF221

HEX#FBF221

RGBrgb(251, 242, 33)

RGB (0–1)0.9843, 0.949, 0.1294

RGB percentages98.4%, 94.9%, 12.9%

HSLhsl(57.5, 96.5%, 55.7%)

HSV / HSBhsv(57.5, 86.9%, 98.4%)

CMYK0%, 3.6%, 86.9%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,511,521

CSS custom property--colour: #FBF221;

Brightness & contrast

Relative luminance0.84123WCAG 2.x, 0 is black and 1 is white

Perceived brightness231 of 255ITU-R BT.601 weighting

Light or darkLight

Best text colour on this backgroundBlackcontrast 17.82:1

Contrast with white1.18:1WCAG normal text: Fail

Contrast with black17.82:1WCAG normal text: AAA

Greyscale equivalent#E5E5E5

Inverted#040DDE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#FFE800no red cones; affects about 1% of men; ΔE 6.9 from the original

Deuteranopia#FFF039no green cones; the most common form, about 1% of men; ΔE 6.4 from the original

Tritanopia#FFE1CFno blue cones; rare, and affects men and women equally; ΔE 79.3 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text1.18:1WCAG large text: Fail

Contrast with black, large text17.82:1WCAG large text: AAA

Named colours

Yellow · ΔE 8.8 Gold · ΔE 16.1 Yellow green · ΔE 34.8 Green yellow · ΔE 36.4 Goldenrod · ΔE 39 Khaki · ΔE 43.9

Nearest named CSS colourYellow (#FFFF00)ΔE 8.84, clearly different but related

Hue familyyellow

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#212AFB

Analogous#FB8521, #97FB21

Triadic#21FBF2, #F221FB

Split complementary#2197FB, #8521FB

Tetradic#21FB85, #212AFB, #FB2197

Tints, shades & saturation

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

Lighter +40%#FFFEE9

Lighter +30%#FEFBB7

Lighter +20%#FDF885

Lighter +10%#FCF553

Darker −10%#E5DC04

Darker −20%#B3AC03

Darker −30%#817B02

Darker −40%#4F4B01

More saturated +25%#FFF61D

Less saturated −25%#DFD83D

Channel breakdown

R251

G242

B33

Red251 (98.4%)

Green242 (94.9%)

Blue33 (12.9%)

Hue57.52°

Saturation (HSL)96.46%

Lightness55.69%

Dominant channelRed

Hex per channelR FB · G F2 · B 21

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FBF221 (chemical formula)

Formula
4,228.366 g/mol
223 atoms

FBF221 has a molar mass of 4,228.366 g/mol, made up of 223 atoms across 2 elements: 222 × F, 1 × B.

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Molar mass

Molar mass4,228.366 g/mol

Total atoms per molecule223

Distinct elements2

Mass of one molecule7.0213669 × 10^-21 g

Molecules per gram1.4242241 × 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

F99.7%

B0.3%

Fluorine (F × 222)4,217.556 g/mol, 99.744%

Boron (B)10.81 g/mol, 0.256%

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Elements in this formula

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