#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
RGBrgb(243, 239, 91)
HSLhsl(58, 86%, 65%)
HSVhsv(58, 63%, 95%)
CMYKcmyk(0%, 1.6%, 62.6%, 4.7%)
CIE-LABlab(92.37, -16.20, 69.56)
CIE-LCHlch(92.37, 71.42, 103.11°)
OKLaboklab(92.87% -0.0505 0.1577)
OKLCHoklch(92.87% 0.166 107.7)
XYZxyz(69.7193, 81.5452, 21.9627)
Luminance0.8154 (WCAG relative)
Temperaturewarm
Familyyellow

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
##F3EF5B1.001.2117.3117.31
#FFFFFF1.211.0021.0021.00
#00000017.3121.001.001.00
##00000017.3121.001.001.00

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 →

#F3EF5B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva