#EFEF59#EFEF59

#EFEF59 is a very light, vivid yellow. Relative luminance 0.808; OKLCH L 92.5% C 0.168 H 109.3°. Best body text is #000000 at 17.16:1 contrast (WCAG AA passes).

Color values

HEX	#EFEF59
RGB	rgb(239, 239, 89)
HSL	hsl(60, 82%, 64%)
HSV	hsv(60, 63%, 94%)
CMYK	cmyk(0%, 0%, 62.8%, 6.3%)
CIE-LAB	lab(92.05, -17.93, 69.91)
CIE-LCH	lch(92.05, 72.18, 104.39°)
OKLab	oklab(92.53% -0.0553 0.1583)
OKLCH	oklch(92.53% 0.168 109.3)
XYZ	xyz(68.2685, 80.8069, 21.4504)
Luminance	0.8081 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFEF59 #5959EF

analogous

#EFA459 #EFEF59 #A4EF59

triadic

#EFEF59 #59EFEF #EF59EF

tetradic

#EFEF59 #59EFA4 #5959EF #EF59A4

square

#EFEF59 #59EFA4 #5959EF #EF59A4

split-complementary

#EFEF59 #59A4EF #A459EF

monochromatic

#BCBC12 #EAEA21 #EFEF59 #F4F491 #FAFAC9

Accessibility & contrast

On white

1.22

#EFEF59 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.16

#EFEF59 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFEF59

17.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFEF59	#FFFFFF	#000000	##000000
##EFEF59	1.00	1.22	17.16	17.16
#FFFFFF	1.22	1.00	21.00	21.00
#000000	17.16	21.00	1.00	1.00
##000000	17.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE645

Deuteranopia (green-blind)

#FFEB63

Tritanopia (blue-blind)

#FFE1D0

Achromatopsia (no color)

#E8E8E8

Design tokens & code

CSS

--color: #efef59;
/* rgb */ color: rgb(239, 239, 89);
/* oklch */ color: oklch(92.5% 0.168 109.3);

Tailwind

colors: {
  custom: {
    50: '#f7f48f',
    500: '#efef59',
    950: '#000000',
  },
}

SCSS

$custom: #efef59;
$custom-light: #f7f48f;
$custom-dark: #000000;

JSON

{
  "hex": "#efef59",
  "rgb": {
    "r": 239,
    "g": 239,
    "b": 89
  },
  "hsl": {
    "h": 60,
    "s": 82.418,
    "l": 64.314
  },
  "oklch": {
    "l": 0.92525,
    "c": 0.16768,
    "h": 109.3
  },
  "luminance": 0.80805
}

Semantic roles & 50–950 ramp

primary

#EFEF59

secondary

#3232BA

accent

#07DF07

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFEF59

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

Preview Lab → · Contrast checker → · Palette generator →