#99EF5B#99EF5B

#99EF5B is a very light, vivid yellow-green. Relative luminance 0.693; OKLCH L 86.8% C 0.200 H 134.4°. Best body text is #000000 at 14.85:1 contrast (WCAG AA passes).

Color values

HEX	#99EF5B
RGB	rgb(153, 239, 91)
HSL	hsl(95, 82%, 65%)
HSV	hsv(95, 62%, 94%)
CMYK	cmyk(36%, 0%, 61.9%, 6.3%)
CIE-LAB	lab(86.63, -50.13, 61.68)
CIE-LCH	lch(86.63, 79.48, 129.10°)
OKLab	oklab(86.78% -0.1396 0.1427)
OKLCH	oklch(86.78% 0.2 134.4)
XYZ	xyz(45.8908, 69.2586, 20.8458)
Luminance	0.6926 (WCAG relative)
Temperature	warm
Family	yellow-green

Closest named colors

Spring Green (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#99EF5B #B15BEF

analogous

#E3EF5B #99EF5B #5BEF67

triadic

#99EF5B #5B99EF #EF5B99

tetradic

#99EF5B #5BE3EF #B15BEF #EF675B

square

#99EF5B #5BE3EF #B15BEF #EF675B

split-complementary

#99EF5B #675BEF #EF5BE3

monochromatic

#5ABD12 #76EA23 #99EF5B #BCF493 #DEFACB

Accessibility & contrast

On white

1.41

#99EF5B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

14.85

#99EF5B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #99EF5B

14.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##99EF5B	#FFFFFF	#000000	##000000
##99EF5B	1.00	1.41	14.85	14.85
#FFFFFF	1.41	1.00	21.00	21.00
#000000	14.85	21.00	1.00	1.00
##000000	14.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#F8DD49

Deuteranopia (green-blind)

#ECD667

Tritanopia (blue-blind)

#98E6D0

Achromatopsia (no color)

#D9D9D9

Design tokens & code

CSS

--color: #99ef5b;
/* rgb */ color: rgb(153, 239, 91);
/* oklch */ color: oklch(86.8% 0.200 134.4);

Tailwind

colors: {
  custom: {
    50: '#bcf58f',
    500: '#99ef5b',
    950: '#000000',
  },
}

SCSS

$custom: #99ef5b;
$custom-light: #bcf58f;
$custom-dark: #000000;

JSON

{
  "hex": "#99ef5b",
  "rgb": {
    "r": 153,
    "g": 239,
    "b": 91
  },
  "hsl": {
    "h": 94.865,
    "s": 82.222,
    "l": 64.706
  },
  "oklch": {
    "l": 0.86779,
    "c": 0.19958,
    "h": 134.4
  },
  "luminance": 0.69261
}

Semantic roles & 50–950 ramp

primary

#99EF5B

secondary

#8233BC

accent

#07DF84

background

#FDFFFC

surface

#F9FEF4

border

#D2D6CE

text

#12170D

muted

#82857F

Preview Lab

Preview with #99EF5B

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

Preview Lab → · Contrast checker → · Palette generator →