#ECF55A#ECF55A

#ECF55A is a very light, vivid yellow. Relative luminance 0.839; OKLCH L 93.6% C 0.174 H 112.5°. Best body text is #000000 at 17.78:1 contrast (WCAG AA passes).

Color values

HEX	#ECF55A
RGB	rgb(236, 245, 90)
HSL	hsl(63, 89%, 66%)
HSV	hsv(63, 63%, 96%)
CMYK	cmyk(3.7%, 0%, 63.3%, 3.9%)
CIE-LAB	lab(93.40, -21.97, 70.86)
CIE-LCH	lch(93.40, 74.19, 107.22°)
OKLab	oklab(93.55% -0.0664 0.1605)
OKLCH	oklch(93.55% 0.174 112.5)
XYZ	xyz(69.0919, 83.8774, 22.2212)
Luminance	0.8388 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF55A #635AF5

analogous

#F5B05A #ECF55A #9EF55A

triadic

#ECF55A #5AECF5 #F55AEC

tetradic

#ECF55A #5AF5B0 #635AF5 #F55A9E

square

#ECF55A #5AF5B0 #635AF5 #F55A9E

split-complementary

#ECF55A #5A9EF5 #B05AF5

monochromatic

#BEC80C #E5F220 #ECF55A #F3F894 #F9FCCD

Accessibility & contrast

On white

1.18

#ECF55A on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.78

#ECF55A on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF55A

17.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF55A	#FFFFFF	#000000	##000000
##ECF55A	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)

#FFEA45

Deuteranopia (green-blind)

#FFEE64

Tritanopia (blue-blind)

#FBE7D5

Achromatopsia (no color)

#ECECEC

Design tokens & code

CSS

--color: #ecf55a;
/* rgb */ color: rgb(236, 245, 90);
/* oklch */ color: oklch(93.6% 0.174 112.5);

Tailwind

colors: {
  custom: {
    50: '#f5f890',
    500: '#ecf55a',
    950: '#000000',
  },
}

SCSS

$custom: #ecf55a;
$custom-light: #f5f890;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf55a",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 90
  },
  "hsl": {
    "h": 63.484,
    "s": 88.571,
    "l": 65.686
  },
  "oklch": {
    "l": 0.93551,
    "c": 0.1737,
    "h": 112.5
  },
  "luminance": 0.83876
}

Semantic roles & 50–950 ramp

primary

#ECF55A

secondary

#372EC5

accent

#00E50E

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECF55A

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

Preview Lab → · Contrast checker → · Palette generator →