#ECF866#ECF866

#ECF866 is a very light, vivid yellow. Relative luminance 0.859; OKLCH L 94.3% C 0.168 H 113.6°. Best body text is #000000 at 18.19:1 contrast (WCAG AA passes).

Color values

HEX	#ECF866
RGB	rgb(236, 248, 102)
HSL	hsl(65, 91%, 69%)
HSV	hsv(65, 59%, 97%)
CMYK	cmyk(4.8%, 0%, 58.9%, 2.7%)
CIE-LAB	lab(94.28, -22.62, 66.96)
CIE-LCH	lch(94.28, 70.68, 108.66°)
OKLab	oklab(94.29% -0.0671 0.1538)
OKLCH	oklch(94.29% 0.168 113.6)
XYZ	xyz(70.5594, 85.9283, 25.4366)
Luminance	0.8593 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF866 #7266F8

analogous

#F8BB66 #ECF866 #A3F866

triadic

#ECF866 #66ECF8 #F866EC

tetradic

#ECF866 #66F8BB #7266F8 #F866A3

square

#ECF866 #66F8BB #7266F8 #F866A3

split-complementary

#ECF866 #66A3F8 #BB66F8

monochromatic

#C9DA0A #E5F52B #ECF866 #F3FBA1 #FBFDDB

Accessibility & contrast

On white

1.15

#ECF866 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

18.19

#ECF866 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF866

18.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF866	#FFFFFF	#000000	##000000
##ECF866	1.00	1.15	18.19	18.19
#FFFFFF	1.15	1.00	21.00	21.00
#000000	18.19	21.00	1.00	1.00
##000000	18.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFED55

Deuteranopia (green-blind)

#FFF06F

Tritanopia (blue-blind)

#FAEBD9

Achromatopsia (no color)

#EFEFEF

Design tokens & code

CSS

--color: #ecf866;
/* rgb */ color: rgb(236, 248, 102);
/* oklch */ color: oklch(94.3% 0.168 113.6);

Tailwind

colors: {
  custom: {
    50: '#f5fa97',
    500: '#ecf866',
    950: '#000000',
  },
}

SCSS

$custom: #ecf866;
$custom-light: #f5fa97;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf866",
  "rgb": {
    "r": 236,
    "g": 248,
    "b": 102
  },
  "hsl": {
    "h": 64.932,
    "s": 91.25,
    "l": 68.627
  },
  "oklch": {
    "l": 0.94289,
    "c": 0.16783,
    "h": 113.6
  },
  "luminance": 0.85927
}

Semantic roles & 50–950 ramp

primary

#ECF866

secondary

#3E31D2

accent

#00E613

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#17170E

muted

#85857F

Preview Lab

Preview with #ECF866

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

Preview Lab → · Contrast checker → · Palette generator →