#ECF366#ECF366

#ECF366 is a very light, vivid yellow. Relative luminance 0.829; OKLCH L 93.2% C 0.162 H 111.8°. Best body text is #000000 at 17.58:1 contrast (WCAG AA passes).

Color values

HEX	#ECF366
RGB	rgb(236, 243, 102)
HSL	hsl(63, 85%, 68%)
HSV	hsv(63, 58%, 95%)
CMYK	cmyk(2.9%, 0%, 58%, 4.7%)
CIE-LAB	lab(92.97, -20.23, 65.52)
CIE-LCH	lch(92.97, 68.57, 107.16°)
OKLab	oklab(93.24% -0.0603 0.1508)
OKLCH	oklch(93.24% 0.162 111.8)
XYZ	xyz(69.0427, 82.8949, 24.9311)
Luminance	0.8289 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF366 #6D66F3

analogous

#F3B466 #ECF366 #A5F366

triadic

#ECF366 #66ECF3 #F366EC

tetradic

#ECF366 #66F3B4 #6D66F3 #F366A5

square

#ECF366 #66F3B4 #6D66F3 #F366A5

split-complementary

#ECF366 #66A5F3 #B466F3

monochromatic

#C5CE10 #E5EF2D #ECF366 #F3F79F #FAFCD7

Accessibility & contrast

On white

1.19

#ECF366 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.58

#ECF366 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF366

17.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF366	#FFFFFF	#000000	##000000
##ECF366	1.00	1.19	17.58	17.58
#FFFFFF	1.19	1.00	21.00	21.00
#000000	17.58	21.00	1.00	1.00
##000000	17.58	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE956

Deuteranopia (green-blind)

#FFED6E

Tritanopia (blue-blind)

#FBE6D5

Achromatopsia (no color)

#EBEBEB

Design tokens & code

CSS

--color: #ecf366;
/* rgb */ color: rgb(236, 243, 102);
/* oklch */ color: oklch(93.2% 0.162 111.8);

Tailwind

colors: {
  custom: {
    50: '#f5f697',
    500: '#ecf366',
    950: '#000000',
  },
}

SCSS

$custom: #ecf366;
$custom-light: #f5f697;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf366",
  "rgb": {
    "r": 236,
    "g": 243,
    "b": 102
  },
  "hsl": {
    "h": 62.979,
    "s": 85.455,
    "l": 67.647
  },
  "oklch": {
    "l": 0.93239,
    "c": 0.1624,
    "h": 111.8
  },
  "luminance": 0.82893
}

Semantic roles & 50–950 ramp

primary

#ECF366

secondary

#3A33CA

accent

#04E20F

background

#FFFFFC

surface

#FFFEF5

border

#D7D6CF

text

#17170E

muted

#85857F

Preview Lab

Preview with #ECF366

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

Preview Lab → · Contrast checker → · Palette generator →