#ECF663#ECF663

#ECF663 is a very light, vivid yellow. Relative luminance 0.846; OKLCH L 93.8% C 0.168 H 112.9°. Best body text is #000000 at 17.93:1 contrast (WCAG AA passes).

Color values

HEX	#ECF663
RGB	rgb(236, 246, 99)
HSL	hsl(64, 89%, 68%)
HSV	hsv(64, 60%, 96%)
CMYK	cmyk(4.1%, 0%, 59.8%, 3.5%)
CIE-LAB	lab(93.73, -21.87, 67.61)
CIE-LCH	lch(93.73, 71.05, 107.93°)
OKLab	oklab(93.84% -0.0653 0.1548)
OKLCH	oklch(93.84% 0.168 112.9)
XYZ	xyz(69.8017, 84.6467, 24.4634)
Luminance	0.8465 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF663 #6D63F6

analogous

#F6B763 #ECF663 #A2F663

triadic

#ECF663 #63ECF6 #F663EC

tetradic

#ECF663 #63F6B7 #6D63F6 #F663A2

square

#ECF663 #63F6B7 #6D63F6 #F663A2

split-complementary

#ECF663 #63A2F6 #B763F6

monochromatic

#C5D20C #E5F329 #ECF663 #F3F99D #FAFDD7

Accessibility & contrast

On white

1.17

#ECF663 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.93

#ECF663 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF663

17.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF663	#FFFFFF	#000000	##000000
##ECF663	1.00	1.17	17.93	17.93
#FFFFFF	1.17	1.00	21.00	21.00
#000000	17.93	21.00	1.00	1.00
##000000	17.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEB52

Deuteranopia (green-blind)

#FFEF6C

Tritanopia (blue-blind)

#FAE8D7

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #ecf663;
/* rgb */ color: rgb(236, 246, 99);
/* oklch */ color: oklch(93.8% 0.168 112.9);

Tailwind

colors: {
  custom: {
    50: '#f5f995',
    500: '#ecf663',
    950: '#000000',
  },
}

SCSS

$custom: #ecf663;
$custom-light: #f5f995;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf663",
  "rgb": {
    "r": 236,
    "g": 246,
    "b": 99
  },
  "hsl": {
    "h": 64.082,
    "s": 89.091,
    "l": 67.647
  },
  "oklch": {
    "l": 0.9384,
    "c": 0.16802,
    "h": 112.9
  },
  "luminance": 0.84645
}

Semantic roles & 50–950 ramp

primary

#ECF663

secondary

#3A30CE

accent

#00E610

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#17170E

muted

#85857F

Preview Lab

Preview with #ECF663

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

Preview Lab → · Contrast checker → · Palette generator →