#99EC57#99EC57

#99EC57 is a very light, vivid yellow-green. Relative luminance 0.675; OKLCH L 86.0% C 0.199 H 133.7°. Best body text is #000000 at 14.49:1 contrast (WCAG AA passes).

Color values

HEX	#99EC57
RGB	rgb(153, 236, 87)
HSL	hsl(93, 80%, 63%)
HSV	hsv(93, 63%, 93%)
CMYK	cmyk(35.2%, 0%, 63.1%, 7.5%)
CIE-LAB	lab(85.73, -49.22, 62.34)
CIE-LCH	lch(85.73, 79.43, 128.30°)
OKLab	oklab(86.03% -0.1374 0.1436)
OKLCH	oklch(86.03% 0.199 133.7)
XYZ	xyz(44.8518, 67.4494, 19.6708)
Luminance	0.6745 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Spring Green (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#99EC57 #AA57EC

analogous

#E3EC57 #99EC57 #57EC5F

triadic

#99EC57 #5799EC #EC5799

tetradic

#99EC57 #57E3EC #AA57EC #EC5F57

square

#99EC57 #57E3EC #AA57EC #EC5F57

split-complementary

#99EC57 #5F57EC #EC57E3

monochromatic

#5BB414 #78E620 #99EC57 #BAF28E #DCF8C5

Accessibility & contrast

On white

1.45

#99EC57 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

14.49

#99EC57 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #99EC57

14.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##99EC57	#FFFFFF	#000000	##000000
##99EC57	1.00	1.45	14.49	14.49
#FFFFFF	1.45	1.00	21.00	21.00
#000000	14.49	21.00	1.00	1.00
##000000	14.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#F5DB45

Deuteranopia (green-blind)

#E9D463

Tritanopia (blue-blind)

#99E3CD

Achromatopsia (no color)

#D6D6D6

Design tokens & code

CSS

--color: #99ec57;
/* rgb */ color: rgb(153, 236, 87);
/* oklch */ color: oklch(86.0% 0.199 133.7);

Tailwind

colors: {
  custom: {
    50: '#bcf28c',
    500: '#99ec57',
    950: '#000000',
  },
}

SCSS

$custom: #99ec57;
$custom-light: #bcf28c;
$custom-dark: #000000;

JSON

{
  "hex": "#99ec57",
  "rgb": {
    "r": 153,
    "g": 236,
    "b": 87
  },
  "hsl": {
    "h": 93.423,
    "s": 79.679,
    "l": 63.333
  },
  "oklch": {
    "l": 0.86033,
    "c": 0.19875,
    "h": 133.7
  },
  "luminance": 0.67451
}

Semantic roles & 50–950 ramp

primary

#99EC57

secondary

#7B33B4

accent

#0ADC7F

background

#FDFFFC

surface

#F9FEF4

border

#D2D6CE

text

#12170D

muted

#82857F

Preview Lab

Preview with #99EC57

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

Preview Lab → · Contrast checker → · Palette generator →