#ECF358#ECF358

#ECF358 is a very light, vivid yellow. Relative luminance 0.826; OKLCH L 93.1% C 0.173 H 111.8°. Best body text is #000000 at 17.53:1 contrast (WCAG AA passes).

Color values

HEX	#ECF358
RGB	rgb(236, 243, 88)
HSL	hsl(63, 87%, 65%)
HSV	hsv(63, 64%, 95%)
CMYK	cmyk(2.9%, 0%, 63.8%, 4.7%)
CIE-LAB	lab(92.86, -21.13, 71.08)
CIE-LCH	lch(92.86, 74.15, 106.56°)
OKLab	oklab(93.11% -0.0643 0.1607)
OKLCH	oklch(93.11% 0.173 111.8)
XYZ	xyz(68.4061, 82.6402, 21.5783)
Luminance	0.8264 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF358 #5F58F3

analogous

#F3AD58 #ECF358 #9EF358

triadic

#ECF358 #58ECF3 #F358EC

tetradic

#ECF358 #58F3AD #5F58F3 #F3589E

square

#ECF358 #58F3AD #5F58F3 #F3589E

split-complementary

#ECF358 #589EF3 #AD58F3

monochromatic

#BAC30E #E6EF1F #ECF358 #F2F791 #F9FBCA

Accessibility & contrast

On white

1.20

#ECF358 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.53

#ECF358 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF358

17.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF358	#FFFFFF	#000000	##000000
##ECF358	1.00	1.20	17.53	17.53
#FFFFFF	1.20	1.00	21.00	21.00
#000000	17.53	21.00	1.00	1.00
##000000	17.53	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFE843

Deuteranopia (green-blind)

#FFEC62

Tritanopia (blue-blind)

#FBE5D3

Achromatopsia (no color)

#EAEAEA

Design tokens & code

CSS

--color: #ecf358;
/* rgb */ color: rgb(236, 243, 88);
/* oklch */ color: oklch(93.1% 0.173 111.8);

Tailwind

colors: {
  custom: {
    50: '#f5f68e',
    500: '#ecf358',
    950: '#000000',
  },
}

SCSS

$custom: #ecf358;
$custom-light: #f5f68e;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf358",
  "rgb": {
    "r": 236,
    "g": 243,
    "b": 88
  },
  "hsl": {
    "h": 62.71,
    "s": 86.592,
    "l": 64.902
  },
  "oklch": {
    "l": 0.93114,
    "c": 0.17305,
    "h": 111.8
  },
  "luminance": 0.82639
}

Semantic roles & 50–950 ramp

primary

#ECF358

secondary

#362FC0

accent

#02E30D

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECF358

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

Preview Lab → · Contrast checker → · Palette generator →