#EFF45B#EFF45B

#EFF45B is a very light, vivid yellow. Relative luminance 0.838; OKLCH L 93.6% C 0.171 H 111.1°. Best body text is #000000 at 17.76:1 contrast (WCAG AA passes).

Color values

HEX	#EFF45B
RGB	rgb(239, 244, 91)
HSL	hsl(62, 87%, 66%)
HSV	hsv(62, 63%, 96%)
CMYK	cmyk(2%, 0%, 62.7%, 4.3%)
CIE-LAB	lab(93.37, -20.23, 70.51)
CIE-LCH	lch(93.37, 73.35, 106.01°)
OKLab	oklab(93.59% -0.0616 0.1598)
OKLCH	oklch(93.59% 0.171 111.1)
XYZ	xyz(69.8377, 83.8091, 22.3934)
Luminance	0.8381 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF45B #605BF4

analogous

#F4AC5B #EFF45B #A2F45B

triadic

#EFF45B #5BEFF4 #F45BEF

tetradic

#EFF45B #5BF4AC #605BF4 #F45BA2

square

#EFF45B #5BF4AC #605BF4 #F45BA2

split-complementary

#EFF45B #5BA2F4 #AC5BF4

monochromatic

#C1C70D #E9F022 #EFF45B #F5F894 #FAFCCE

Accessibility & contrast

On white

1.18

#EFF45B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.76

#EFF45B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF45B

17.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF45B	#FFFFFF	#000000	##000000
##EFF45B	1.00	1.18	17.76	17.76
#FFFFFF	1.18	1.00	21.00	21.00
#000000	17.76	21.00	1.00	1.00
##000000	17.76	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA47

Deuteranopia (green-blind)

#FFEE65

Tritanopia (blue-blind)

#FFE6D4

Achromatopsia (no color)

#ECECEC

Design tokens & code

CSS

--color: #eff45b;
/* rgb */ color: rgb(239, 244, 91);
/* oklch */ color: oklch(93.6% 0.171 111.1);

Tailwind

colors: {
  custom: {
    50: '#f7f790',
    500: '#eff45b',
    950: '#000000',
  },
}

SCSS

$custom: #eff45b;
$custom-light: #f7f790;
$custom-dark: #000000;

JSON

{
  "hex": "#eff45b",
  "rgb": {
    "r": 239,
    "g": 244,
    "b": 91
  },
  "hsl": {
    "h": 61.961,
    "s": 87.429,
    "l": 65.686
  },
  "oklch": {
    "l": 0.93585,
    "c": 0.17129,
    "h": 111.1
  },
  "luminance": 0.83807
}

Semantic roles & 50–950 ramp

primary

#EFF45B

secondary

#342FC4

accent

#02E409

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFF45B

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

Preview Lab → · Contrast checker → · Palette generator →