#EFEF5B#EFEF5B

#EFEF5B is a very light, vivid yellow. Relative luminance 0.808; OKLCH L 92.5% C 0.166 H 109.3°. Best body text is #000000 at 17.17:1 contrast (WCAG AA passes).

Color values

HEX	#EFEF5B
RGB	rgb(239, 239, 91)
HSL	hsl(60, 82%, 65%)
HSV	hsv(60, 62%, 94%)
CMYK	cmyk(0%, 0%, 61.9%, 6.3%)
CIE-LAB	lab(92.06, -17.81, 69.13)
CIE-LCH	lch(92.06, 71.39, 104.45°)
OKLab	oklab(92.54% -0.0548 0.1569)
OKLCH	oklch(92.54% 0.166 109.3)
XYZ	xyz(68.3536, 80.8410, 21.8987)
Luminance	0.8084 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFEF5B #5B5BEF

analogous

#EFA55B #EFEF5B #A5EF5B

triadic

#EFEF5B #5BEFEF #EF5BEF

tetradic

#EFEF5B #5BEFA5 #5B5BEF #EF5BA5

square

#EFEF5B #5BEFA5 #5B5BEF #EF5BA5

split-complementary

#EFEF5B #5BA5EF #A55BEF

monochromatic

#BDBD12 #EAEA23 #EFEF5B #F4F493 #FAFACB

Accessibility & contrast

On white

1.22

#EFEF5B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.17

#EFEF5B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFEF5B

17.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFEF5B	#FFFFFF	#000000	##000000
##EFEF5B	1.00	1.22	17.17	17.17
#FFFFFF	1.22	1.00	21.00	21.00
#000000	17.17	21.00	1.00	1.00
##000000	17.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE648

Deuteranopia (green-blind)

#FFEB64

Tritanopia (blue-blind)

#FFE1D0

Achromatopsia (no color)

#E8E8E8

Design tokens & code

CSS

--color: #efef5b;
/* rgb */ color: rgb(239, 239, 91);
/* oklch */ color: oklch(92.5% 0.166 109.3);

Tailwind

colors: {
  custom: {
    50: '#f7f490',
    500: '#efef5b',
    950: '#000000',
  },
}

SCSS

$custom: #efef5b;
$custom-light: #f7f490;
$custom-dark: #000000;

JSON

{
  "hex": "#efef5b",
  "rgb": {
    "r": 239,
    "g": 239,
    "b": 91
  },
  "hsl": {
    "h": 60,
    "s": 82.222,
    "l": 64.706
  },
  "oklch": {
    "l": 0.92542,
    "c": 0.16621,
    "h": 109.3
  },
  "luminance": 0.80839
}

Semantic roles & 50–950 ramp

primary

#EFEF5B

secondary

#3333BC

accent

#07DF07

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFEF5B

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

Preview Lab → · Contrast checker → · Palette generator →