#FFEF63#FFEF63

#FFEF63 is a very light, vivid yellow. Relative luminance 0.839; OKLCH L 93.9% C 0.159 H 102.8°. Best body text is #000000 at 17.78:1 contrast (WCAG AA passes).

Color values

HEX	#FFEF63
RGB	rgb(255, 239, 99)
HSL	hsl(54, 100%, 69%)
HSV	hsv(54, 61%, 100%)
CMYK	cmyk(0%, 6.3%, 61.2%, 0%)
CIE-LAB	lab(93.41, -10.85, 67.69)
CIE-LCH	lch(93.41, 68.55, 99.11°)
OKLab	oklab(93.94% -0.0351 0.1546)
OKLCH	oklch(93.94% 0.159 102.8)
XYZ	xyz(74.3614, 83.8967, 24.0787)
Luminance	0.8389 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#FFEF63 #6373FF

analogous

#FFA163 #FFEF63 #C1FF63

triadic

#FFEF63 #63FFEF #EF63FF

tetradic

#FFEF63 #63FFA1 #6373FF #FF63C1

square

#FFEF63 #63FFA1 #6373FF #FF63C1

split-complementary

#FFEF63 #63C1FF #A163FF

monochromatic

#E8D000 #FFE926 #FFEF63 #FFF5A0 #FFFCDD

Accessibility & contrast

On white

1.18

#FFEF63 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.78

#FFEF63 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #FFEF63

17.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##FFEF63	#FFFFFF	#000000	##000000
##FFEF63	1.00	1.18	17.78	17.78
#FFFFFF	1.18	1.00	21.00	21.00
#000000	17.78	21.00	1.00	1.00
##000000	17.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE853

Deuteranopia (green-blind)

#FFEF6B

Tritanopia (blue-blind)

#FFE0D1

Achromatopsia (no color)

#ECECEC

Design tokens & code

CSS

--color: #ffef63;
/* rgb */ color: rgb(255, 239, 99);
/* oklch */ color: oklch(93.9% 0.159 102.8);

Tailwind

colors: {
  custom: {
    50: '#fff495',
    500: '#ffef63',
    950: '#000000',
  },
}

SCSS

$custom: #ffef63;
$custom-light: #fff495;
$custom-dark: #000000;

JSON

{
  "hex": "#ffef63",
  "rgb": {
    "r": 255,
    "g": 239,
    "b": 99
  },
  "hsl": {
    "h": 53.846,
    "s": 100,
    "l": 69.412
  },
  "oklch": {
    "l": 0.93942,
    "c": 0.15851,
    "h": 102.8
  },
  "luminance": 0.83894
}

Semantic roles & 50–950 ramp

primary

#FFEF63

secondary

#2C3EDA

accent

#18E600

background

#FFFFFC

surface

#FFFEF5

border

#D7D6CF

text

#19170E

muted

#87857F

Preview Lab

Preview with #FFEF63

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

Preview Lab → · Contrast checker → · Palette generator →