#EFF143#EFF143

#EFF143 is a very light, vivid yellow. Relative luminance 0.817; OKLCH L 92.8% C 0.184 H 110.2°. Best body text is #000000 at 17.33:1 contrast (WCAG AA passes).

Color values

HEX	#EFF143
RGB	rgb(239, 241, 67)
HSL	hsl(61, 86%, 60%)
HSV	hsv(61, 72%, 95%)
CMYK	cmyk(0.8%, 0%, 72.2%, 5.5%)
CIE-LAB	lab(92.43, -20.02, 78.23)
CIE-LCH	lch(92.43, 80.75, 104.36°)
OKLab	oklab(92.79% -0.0633 0.1723)
OKLCH	oklch(92.79% 0.184 110.2)
XYZ	xyz(68.0674, 81.6685, 17.4871)
Luminance	0.8167 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF143 #4543F1

analogous

#F19C43 #EFF143 #98F143

triadic

#EFF143 #43EFF1 #F143EF

tetradic

#EFF143 #43F19C #4543F1 #F14398

square

#EFF143 #43F19C #4543F1 #F14398

split-complementary

#EFF143 #4398F1 #9C43F1

monochromatic

#ABAD0D #E3E611 #EFF143 #F4F57C #F9F9B5

Accessibility & contrast

On white

1.21

#EFF143 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.33

#EFF143 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF143

17.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF143	#FFFFFF	#000000	##000000
##EFF143	1.00	1.21	17.33	17.33
#FFFFFF	1.21	1.00	21.00	21.00
#000000	17.33	21.00	1.00	1.00
##000000	17.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE71F

Deuteranopia (green-blind)

#FFEC51

Tritanopia (blue-blind)

#FFE2D0

Achromatopsia (no color)

#E9E9E9

Design tokens & code

CSS

--color: #eff143;
/* rgb */ color: rgb(239, 241, 67);
/* oklch */ color: oklch(92.8% 0.184 110.2);

Tailwind

colors: {
  custom: {
    50: '#f8f583',
    500: '#eff143',
    950: '#000000',
  },
}

SCSS

$custom: #eff143;
$custom-light: #f8f583;
$custom-dark: #000000;

JSON

{
  "hex": "#eff143",
  "rgb": {
    "r": 239,
    "g": 241,
    "b": 67
  },
  "hsl": {
    "h": 60.69,
    "s": 86.139,
    "l": 60.392
  },
  "oklch": {
    "l": 0.92785,
    "c": 0.18358,
    "h": 110.2
  },
  "luminance": 0.81667
}

Semantic roles & 50–950 ramp

primary

#EFF143

secondary

#2C2BAD

accent

#03E305

background

#FFFFFC

surface

#FFFEF3

border

#D7D6CD

text

#18170C

muted

#86857F

Preview Lab

Preview with #EFF143

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

Preview Lab → · Contrast checker → · Palette generator →