#EFF05B#EFF05B

#EFF05B is a very light, vivid yellow. Relative luminance 0.814; OKLCH L 92.8% C 0.167 H 109.6°. Best body text is #000000 at 17.29:1 contrast (WCAG AA passes).

Color values

HEX	#EFF05B
RGB	rgb(239, 240, 91)
HSL	hsl(60, 83%, 65%)
HSV	hsv(60, 62%, 94%)
CMYK	cmyk(0.4%, 0%, 62.1%, 5.9%)
CIE-LAB	lab(92.32, -18.30, 69.41)
CIE-LCH	lch(92.32, 71.78, 104.77°)
OKLab	oklab(92.75% -0.0562 0.1575)
OKLCH	oklch(92.75% 0.167 109.6)
XYZ	xyz(68.6472, 81.4281, 21.9966)
Luminance	0.8143 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#EFF05B #5C5BF0

analogous

#F0A75B #EFF05B #A4F05B

triadic

#EFF05B #5BEFF0 #F05BEF

tetradic

#EFF05B #5BF0A7 #5C5BF0 #F05BA4

square

#EFF05B #5BF0A7 #5C5BF0 #F05BA4

split-complementary

#EFF05B #5BA4F0 #A75BF0

monochromatic

#BEBF11 #EAEB23 #EFF05B #F4F593 #FAFACB

Accessibility & contrast

On white

1.21

#EFF05B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.29

#EFF05B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #EFF05B

17.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##EFF05B	#FFFFFF	#000000	##000000
##EFF05B	1.00	1.21	17.29	17.29
#FFFFFF	1.21	1.00	21.00	21.00
#000000	17.29	21.00	1.00	1.00
##000000	17.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE648

Deuteranopia (green-blind)

#FFEB64

Tritanopia (blue-blind)

#FFE2D1

Achromatopsia (no color)

#E9E9E9

Design tokens & code

CSS

--color: #eff05b;
/* rgb */ color: rgb(239, 240, 91);
/* oklch */ color: oklch(92.8% 0.167 109.6);

Tailwind

colors: {
  custom: {
    50: '#f7f490',
    500: '#eff05b',
    950: '#000000',
  },
}

SCSS

$custom: #eff05b;
$custom-light: #f7f490;
$custom-dark: #000000;

JSON

{
  "hex": "#eff05b",
  "rgb": {
    "r": 239,
    "g": 240,
    "b": 91
  },
  "hsl": {
    "h": 60.403,
    "s": 83.24,
    "l": 64.902
  },
  "oklch": {
    "l": 0.9275,
    "c": 0.16722,
    "h": 109.6
  },
  "luminance": 0.81426
}

Semantic roles & 50–950 ramp

primary

#EFF05B

secondary

#3332BD

accent

#06E007

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #EFF05B

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

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