#F3EF5B#F3EF5B

#F3EF5B is a very light, vivid yellow. Relative luminance 0.815; OKLCH L 92.9% C 0.166 H 107.7°. Best body text is #000000 at 17.31:1 contrast (WCAG AA passes).

Color values

HEX	#F3EF5B
RGB	rgb(243, 239, 91)
HSL	hsl(58, 86%, 65%)
HSV	hsv(58, 63%, 95%)
CMYK	cmyk(0%, 1.6%, 62.6%, 4.7%)
CIE-LAB	lab(92.37, -16.20, 69.56)
CIE-LCH	lch(92.37, 71.42, 103.11°)
OKLab	oklab(92.87% -0.0505 0.1577)
OKLCH	oklch(92.87% 0.166 107.7)
XYZ	xyz(69.7193, 81.5452, 21.9627)
Luminance	0.8154 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#F3EF5B #5B5FF3

analogous

#F3A35B #F3EF5B #ABF35B

triadic

#F3EF5B #5BF3EF #EF5BF3

tetradic

#F3EF5B #5BF3A3 #5B5FF3 #F35BAB

square

#F3EF5B #5BF3A3 #5B5FF3 #F35BAB

split-complementary

#F3EF5B #5BABF3 #A35BF3

monochromatic

#C5C00E #EFE922 #F3EF5B #F7F594 #FBFACD

Accessibility & contrast

On white

1.21

#F3EF5B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.31

#F3EF5B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #F3EF5B

17.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##F3EF5B	#FFFFFF	#000000	##000000
##F3EF5B	1.00	1.21	17.31	17.31
#FFFFFF	1.21	1.00	21.00	21.00
#000000	17.31	21.00	1.00	1.00
##000000	17.31	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE648

Deuteranopia (green-blind)

#FFEC64

Tritanopia (blue-blind)

#FFE0D0

Achromatopsia (no color)

#E9E9E9

Design tokens & code

CSS

--color: #f3ef5b;
/* rgb */ color: rgb(243, 239, 91);
/* oklch */ color: oklch(92.9% 0.166 107.7);

Tailwind

colors: {
  custom: {
    50: '#faf490',
    500: '#f3ef5b',
    950: '#000000',
  },
}

SCSS

$custom: #f3ef5b;
$custom-light: #faf490;
$custom-dark: #000000;

JSON

{
  "hex": "#f3ef5b",
  "rgb": {
    "r": 243,
    "g": 239,
    "b": 91
  },
  "hsl": {
    "h": 58.421,
    "s": 86.364,
    "l": 65.49
  },
  "oklch": {
    "l": 0.92867,
    "c": 0.1656,
    "h": 107.7
  },
  "luminance": 0.81543
}

Semantic roles & 50–950 ramp

primary

#F3EF5B

secondary

#3034C2

accent

#09E303

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #F3EF5B

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →