#ECF66B#ECF66B

#ECF66B is a very light, vivid yellow. Relative luminance 0.848; OKLCH L 93.9% C 0.162 H 112.9°. Best body text is #000000 at 17.96:1 contrast (WCAG AA passes).

Color values

HEX	#ECF66B
RGB	rgb(236, 246, 107)
HSL	hsl(64, 89%, 69%)
HSV	hsv(64, 57%, 96%)
CMYK	cmyk(4.1%, 0%, 56.5%, 3.5%)
CIE-LAB	lab(93.80, -21.31, 64.32)
CIE-LCH	lch(93.80, 67.75, 108.33°)
OKLab	oklab(93.92% -0.0629 0.1488)
OKLCH	oklch(93.92% 0.162 112.9)
XYZ	xyz(70.2033, 84.8073, 26.5783)
Luminance	0.8481 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF66B #756BF6

analogous

#F6BB6B #ECF66B #A6F66B

triadic

#ECF66B #6BECF6 #F66BEC

tetradic

#ECF66B #6BF6BB #756BF6 #F66BA6

square

#ECF66B #6BF6BB #756BF6 #F66BA6

split-complementary

#ECF66B #6BA6F6 #BB6BF6

monochromatic

#CBD90D #E5F231 #ECF66B #F3FAA5 #FBFDDE

Accessibility & contrast

On white

1.17

#ECF66B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.96

#ECF66B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF66B

17.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF66B	#FFFFFF	#000000	##000000
##ECF66B	1.00	1.17	17.96	17.96
#FFFFFF	1.17	1.00	21.00	21.00
#000000	17.96	21.00	1.00	1.00
##000000	17.96	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEC5C

Deuteranopia (green-blind)

#FFEF73

Tritanopia (blue-blind)

#FAE9D8

Achromatopsia (no color)

#EDEDED

Design tokens & code

CSS

--color: #ecf66b;
/* rgb */ color: rgb(236, 246, 107);
/* oklch */ color: oklch(93.9% 0.162 112.9);

Tailwind

colors: {
  custom: {
    50: '#f5f99a',
    500: '#ecf66b',
    950: '#000000',
  },
}

SCSS

$custom: #ecf66b;
$custom-light: #f5f99a;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf66b",
  "rgb": {
    "r": 236,
    "g": 246,
    "b": 107
  },
  "hsl": {
    "h": 64.317,
    "s": 88.535,
    "l": 69.216
  },
  "oklch": {
    "l": 0.93918,
    "c": 0.16154,
    "h": 112.9
  },
  "luminance": 0.84806
}

Semantic roles & 50–950 ramp

primary

#ECF66B

secondary

#4136D0

accent

#00E511

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#17170E

muted

#85857F

Preview Lab

Preview with #ECF66B

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

Preview Lab → · Contrast checker → · Palette generator →