#ECF166#ECF166

#ECF166 is a very light, vivid yellow. Relative luminance 0.817; OKLCH L 92.8% C 0.160 H 111.1°. Best body text is #000000 at 17.34:1 contrast (WCAG AA passes).

Color values

HEX	#ECF166
RGB	rgb(236, 241, 102)
HSL	hsl(62, 83%, 67%)
HSV	hsv(62, 58%, 95%)
CMYK	cmyk(2.1%, 0%, 57.7%, 5.5%)
CIE-LAB	lab(92.44, -19.26, 64.94)
CIE-LCH	lch(92.44, 67.74, 106.52°)
OKLab	oklab(92.82% -0.0576 0.1495)
OKLCH	oklch(92.82% 0.16 111.1)
XYZ	xyz(68.4474, 81.7043, 24.7327)
Luminance	0.8170 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF166 #6B66F1

analogous

#F1B066 #ECF166 #A7F166

triadic

#ECF166 #66ECF1 #F166EC

tetradic

#ECF166 #66F1B0 #6B66F1 #F166A7

square

#ECF166 #66F1B0 #6B66F1 #F166A7

split-complementary

#ECF166 #66A7F1 #B066F1

monochromatic

#C4CA12 #E5EC2E #ECF166 #F3F69E #FAFBD6

Accessibility & contrast

On white

1.21

#ECF166 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.34

#ECF166 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF166

17.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF166	#FFFFFF	#000000	##000000
##ECF166	1.00	1.21	17.34	17.34
#FFFFFF	1.21	1.00	21.00	21.00
#000000	17.34	21.00	1.00	1.00
##000000	17.34	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE757

Deuteranopia (green-blind)

#FFEB6E

Tritanopia (blue-blind)

#FBE4D3

Achromatopsia (no color)

#E9E9E9

Design tokens & code

CSS

--color: #ecf166;
/* rgb */ color: rgb(236, 241, 102);
/* oklch */ color: oklch(92.8% 0.160 111.1);

Tailwind

colors: {
  custom: {
    50: '#f5f597',
    500: '#ecf166',
    950: '#000000',
  },
}

SCSS

$custom: #ecf166;
$custom-light: #f5f597;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf166",
  "rgb": {
    "r": 236,
    "g": 241,
    "b": 102
  },
  "hsl": {
    "h": 62.158,
    "s": 83.234,
    "l": 67.255
  },
  "oklch": {
    "l": 0.9282,
    "c": 0.16026,
    "h": 111.1
  },
  "luminance": 0.81703
}

Semantic roles & 50–950 ramp

primary

#ECF166

secondary

#3A34C7

accent

#06E00E

background

#FFFFFC

surface

#FFFEF5

border

#D7D6CF

text

#17170E

muted

#85857F

Preview Lab

Preview with #ECF166

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

Preview Lab → · Contrast checker → · Palette generator →