#ECF558#ECF558

#ECF558 is a very light, vivid yellow. Relative luminance 0.838; OKLCH L 93.5% C 0.175 H 112.5°. Best body text is #000000 at 17.77:1 contrast (WCAG AA passes).

Color values

HEX	#ECF558
RGB	rgb(236, 245, 88)
HSL	hsl(63, 89%, 65%)
HSV	hsv(63, 64%, 96%)
CMYK	cmyk(3.7%, 0%, 64.1%, 3.9%)
CIE-LAB	lab(93.38, -22.09, 71.63)
CIE-LCH	lch(93.38, 74.95, 107.14°)
OKLab	oklab(93.54% -0.0669 0.1618)
OKLCH	oklch(93.54% 0.175 112.5)
XYZ	xyz(69.0079, 83.8438, 21.7789)
Luminance	0.8384 (WCAG relative)
Temperature	warm
Family	yellow

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#ECF558 #6158F5

analogous

#F5AF58 #ECF558 #9EF558

triadic

#ECF558 #58ECF5 #F558EC

tetradic

#ECF558 #58F5AF #6158F5 #F5589E

square

#ECF558 #58F5AF #6158F5 #F5589E

split-complementary

#ECF558 #589EF5 #AF58F5

monochromatic

#BCC70C #E5F21E #ECF558 #F3F892 #F9FCCB

Accessibility & contrast

On white

1.18

#ECF558 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

17.77

#ECF558 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #ECF558

17.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##ECF558	#FFFFFF	#000000	##000000
##ECF558	1.00	1.18	17.77	17.77
#FFFFFF	1.18	1.00	21.00	21.00
#000000	17.77	21.00	1.00	1.00
##000000	17.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#FFEA43

Deuteranopia (green-blind)

#FFEE63

Tritanopia (blue-blind)

#FBE7D5

Achromatopsia (no color)

#ECECEC

Design tokens & code

CSS

--color: #ecf558;
/* rgb */ color: rgb(236, 245, 88);
/* oklch */ color: oklch(93.5% 0.175 112.5);

Tailwind

colors: {
  custom: {
    50: '#f5f88f',
    500: '#ecf558',
    950: '#000000',
  },
}

SCSS

$custom: #ecf558;
$custom-light: #f5f88f;
$custom-dark: #000000;

JSON

{
  "hex": "#ecf558",
  "rgb": {
    "r": 236,
    "g": 245,
    "b": 88
  },
  "hsl": {
    "h": 63.439,
    "s": 88.701,
    "l": 65.294
  },
  "oklch": {
    "l": 0.93535,
    "c": 0.17512,
    "h": 112.5
  },
  "luminance": 0.83842
}

Semantic roles & 50–950 ramp

primary

#ECF558

secondary

#362EC3

accent

#00E50D

background

#FFFFFC

surface

#FFFEF4

border

#D7D6CE

text

#18170D

muted

#86857F

Preview Lab

Preview with #ECF558

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

Preview Lab → · Contrast checker → · Palette generator →