#ECF378#ECF378

#ECF378 is a very light, vivid yellow. Relative luminance 0.833; OKLCH L 93.4% C 0.147 H 111.8°. Best body text is #000000 at 17.66:1 contrast (WCAG AA passes).

Color values

HEX	#ECF378
RGB	rgb(236, 243, 120)
HSL	hsl(63, 84%, 71%)
HSV	hsv(63, 51%, 95%)
CMYK	cmyk(2.9%, 0%, 50.6%, 4.7%)
CIE-LAB	lab(93.14, -18.83, 57.81)
CIE-LCH	lch(93.14, 60.80, 108.04°)
OKLab	oklab(93.43% -0.0546 0.1361)
OKLCH	oklch(93.43% 0.147 111.8)
XYZ	xyz(70.0342, 83.2915, 30.1532)
Luminance	0.8329 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF378 #7F78F3

analogous

#F3BC78 #ECF378 #AEF378

triadic

#ECF378 #78ECF3 #F378EC

tetradic

#ECF378 #78F3BC #7F78F3 #F378AE

square

#ECF378 #78F3BC #7F78F3 #F378AE

split-complementary

#ECF378 #78AEF3 #BC78F3

monochromatic

#D1DD14 #E4EE40 #ECF378 #F4F8B0 #FBFDE3

Accessibility & contrast

On white

1.19

#ECF378 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.66

#ECF378 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF378

17.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF378	#FFFFFF	#000000	##000000
##ECF378	1.00	1.19	17.66	17.66
#FFFFFF	1.19	1.00	21.00	21.00
#000000	17.66	21.00	1.00	1.00
##000000	17.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA6C

Deuteranopia (green-blind)

#FFED7F

Tritanopia (blue-blind)

#F9E7D7

Achromatopsia (no color)

#EBEBEB

Design tokens & code

CSS

--color: #ecf378;
/* rgb */ color: rgb(236, 243, 120);
/* oklch */ color: oklch(93.4% 0.147 111.8);

Tailwind

colors: {
  custom: {
    50: '#f4f6a2',
    500: '#ecf378',
    950: '#000000',
  },
}

SCSS

$custom: #ecf378;
$custom-light: #f4f6a2;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf378",
  "rgb": {
    "r": 236,
    "g": 243,
    "b": 120
  },
  "hsl": {
    "h": 63.415,
    "s": 83.673,
    "l": 71.176
  },
  "oklch": {
    "l": 0.93434,
    "c": 0.14667,
    "h": 111.8
  },
  "luminance": 0.8329
}

Semantic roles & 50–950 ramp

primary

#ECF378

secondary

#4A42CE

accent

#05E012

background

#FFFFFC

surface

#FFFEF6

border

#D7D6D0

text

#17170F

muted

#858580

Preview Lab

Preview with #ECF378

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

Preview Lab → · Contrast checker → · Palette generator →