#ECFF63#ECFF63

#ECFF63 is a very light, vivid yellow. Relative luminance 0.903; OKLCH L 95.7% C 0.178 H 115.7°. Best body text is #000000 at 19.05:1 contrast (WCAG AA passes).

Color values

HEX	#ECFF63
RGB	rgb(236, 255, 99)
HSL	hsl(67, 100%, 69%)
HSV	hsv(67, 61%, 100%)
CMYK	cmyk(7.5%, 0%, 61.2%, 0%)
CIE-LAB	lab(96.10, -26.13, 70.17)
CIE-LCH	lch(96.10, 74.87, 110.43°)
OKLab	oklab(95.74% -0.0772 0.1603)
OKLCH	oklch(95.74% 0.178 115.7)
XYZ	xyz(72.6058, 90.2547, 25.3980)
Luminance	0.9025 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECFF63 #7663FF

analogous

#FFC463 #ECFF63 #9EFF63

triadic

#ECFF63 #63ECFF #FF63EC

tetradic

#ECFF63 #63FFC4 #7663FF #FF639E

square

#ECFF63 #63FFC4 #7663FF #FF639E

split-complementary

#ECFF63 #639EFF #C463FF

monochromatic

#CBE800 #E5FF26 #ECFF63 #F3FFA0 #FBFFDD

Accessibility & contrast

On white

1.10

#ECFF63 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

19.05

#ECFF63 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECFF63

19.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECFF63	#FFFFFF	#000000	##000000
##ECFF63	1.00	1.10	19.05	19.05
#FFFFFF	1.10	1.00	21.00	21.00
#000000	19.05	21.00	1.00	1.00
##000000	19.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFF350

Deuteranopia (green-blind)

#FFF56D

Tritanopia (blue-blind)

#FAF1DE

Achromatopsia (no color)

#F4F4F4

Design tokens & code

CSS

--color: #ecff63;
/* rgb */ color: rgb(236, 255, 99);
/* oklch */ color: oklch(95.7% 0.178 115.7);

Tailwind

colors: {
  custom: {
    50: '#f5ff96',
    500: '#ecff63',
    950: '#000000',
  },
}

SCSS

$custom: #ecff63;
$custom-light: #f5ff96;
$custom-dark: #000000;

JSON

{
  "hex": "#ecff63",
  "rgb": {
    "r": 236,
    "g": 255,
    "b": 99
  },
  "hsl": {
    "h": 67.308,
    "s": 100,
    "l": 69.412
  },
  "oklch": {
    "l": 0.95739,
    "c": 0.17789,
    "h": 115.7
  },
  "luminance": 0.90254
}

Semantic roles & 50–950 ramp

primary

#ECFF63

secondary

#412CDA

accent

#00E61C

background

#FFFFFC

surface

#FFFFF5

border

#D7D7CF

text

#17170E

muted

#85857F

Preview Lab

Preview with #ECFF63

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

Preview Lab → · Contrast checker → · Palette generator →