#99EC51#99EC51

#99EC51 is a very light, highly saturated yellow-green. Relative luminance 0.674; OKLCH L 86.0% C 0.203 H 133.3°. Best body text is #000000 at 14.47:1 contrast (WCAG AA passes).

Color values

HEX	#99EC51
RGB	rgb(153, 236, 81)
HSL	hsl(92, 80%, 62%)
HSV	hsv(92, 66%, 93%)
CMYK	cmyk(35.2%, 0%, 65.7%, 7.5%)
CIE-LAB	lab(85.68, -49.70, 64.68)
CIE-LCH	lch(85.68, 81.57, 127.54°)
OKLab	oklab(85.98% -0.1391 0.1478)
OKLCH	oklch(85.98% 0.203 133.3)
XYZ	xyz(44.6168, 67.3554, 18.4330)
Luminance	0.6736 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Spring Green (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#99EC51 #A451EC

analogous

#E7EC51 #99EC51 #51EC57

triadic

#99EC51 #5199EC #EC5199

tetradic

#99EC51 #51E7EC #A451EC #EC5751

square

#99EC51 #51E7EC #A451EC #EC5751

split-complementary

#99EC51 #5751EC #EC51E7

monochromatic

#5CAF13 #79E61A #99EC51 #B9F288 #DAF8BF

Accessibility & contrast

On white

1.45

#99EC51 on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

14.47

#99EC51 on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #99EC51

14.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##99EC51	#FFFFFF	#000000	##000000
##99EC51	1.00	1.45	14.47	14.47
#FFFFFF	1.45	1.00	21.00	21.00
#000000	14.47	21.00	1.00	1.00
##000000	14.47	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#F5DA3C

Deuteranopia (green-blind)

#EAD45E

Tritanopia (blue-blind)

#9AE3CC

Achromatopsia (no color)

#D6D6D6

Design tokens & code

CSS

--color: #99ec51;
/* rgb */ color: rgb(153, 236, 81);
/* oklch */ color: oklch(86.0% 0.203 133.3);

Tailwind

colors: {
  custom: {
    50: '#bcf289',
    500: '#99ec51',
    950: '#000000',
  },
}

SCSS

$custom: #99ec51;
$custom-light: #bcf289;
$custom-dark: #000000;

JSON

{
  "hex": "#99ec51",
  "rgb": {
    "r": 153,
    "g": 236,
    "b": 81
  },
  "hsl": {
    "h": 92.129,
    "s": 80.311,
    "l": 62.157
  },
  "oklch": {
    "l": 0.85979,
    "c": 0.20302,
    "h": 133.3
  },
  "luminance": 0.67357
}

Semantic roles & 50–950 ramp

primary

#99EC51

secondary

#7531B0

accent

#09DD7A

background

#FDFFFC

surface

#F9FEF4

border

#D2D6CE

text

#12170C

muted

#82857F

Preview Lab

Preview with #99EC51

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

Preview Lab → · Contrast checker → · Palette generator →