#EFF359#EFF359

#EFF359 is a very light, vivid yellow. Relative luminance 0.832; OKLCH L 93.4% C 0.172 H 110.7°. Best body text is #000000 at 17.63:1 contrast (WCAG AA passes).

Color values

HEX	#EFF359
RGB	rgb(239, 243, 89)
HSL	hsl(62, 87%, 65%)
HSV	hsv(62, 63%, 95%)
CMYK	cmyk(1.6%, 0%, 63.4%, 4.7%)
CIE-LAB	lab(93.09, -19.87, 71.00)
CIE-LCH	lch(93.09, 73.73, 105.63°)
OKLab	oklab(93.36% -0.0608 0.1606)
OKLCH	oklch(93.36% 0.172 110.7)
XYZ	xyz(69.4525, 83.1749, 21.8451)
Luminance	0.8317 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF359 #5D59F3

analogous

#F3AA59 #EFF359 #A2F359

triadic

#EFF359 #59EFF3 #F359EF

tetradic

#EFF359 #59F3AA #5D59F3 #F359A2

square

#EFF359 #59F3AA #5D59F3 #F359A2

split-complementary

#EFF359 #59A2F3 #AA59F3

monochromatic

#BFC30E #EAEF20 #EFF359 #F5F792 #FAFBCB

Accessibility & contrast

On white

1.19

#EFF359 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.63

#EFF359 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF359

17.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF359	#FFFFFF	#000000	##000000
##EFF359	1.00	1.19	17.63	17.63
#FFFFFF	1.19	1.00	21.00	21.00
#000000	17.63	21.00	1.00	1.00
##000000	17.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE944

Deuteranopia (green-blind)

#FFED63

Tritanopia (blue-blind)

#FFE5D3

Achromatopsia (no color)

#EBEBEB

Design tokens & code

CSS

--color: #eff359;
/* rgb */ color: rgb(239, 243, 89);
/* oklch */ color: oklch(93.4% 0.172 110.7);

Tailwind

colors: {
  custom: {
    50: '#f8f68f',
    500: '#eff359',
    950: '#000000',
  },
}

SCSS

$custom: #eff359;
$custom-light: #f8f68f;
$custom-dark: #000000;

JSON

{
  "hex": "#eff359",
  "rgb": {
    "r": 239,
    "g": 243,
    "b": 89
  },
  "hsl": {
    "h": 61.558,
    "s": 86.517,
    "l": 65.098
  },
  "oklch": {
    "l": 0.93359,
    "c": 0.1717,
    "h": 110.7
  },
  "luminance": 0.83173
}

Semantic roles & 50–950 ramp

primary

#EFF359

secondary

#332FC1

accent

#02E308

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFF359

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

Preview Lab → · Contrast checker → · Palette generator →