#1BB31F#1BB31F

#1BB31F is a light, highly saturated green. Relative luminance 0.326; OKLCH L 66.7% C 0.215 H 142.9°. Best body text is #000000 at 7.51:1 contrast (WCAG AA passes).

Color values

HEX	#1BB31F
RGB	rgb(27, 179, 31)
HSL	hsl(122, 74%, 40%)
HSV	hsv(122, 85%, 70%)
CMYK	cmyk(84.9%, 0%, 82.7%, 29.8%)
CIE-LAB	lab(63.81, -63.31, 58.66)
CIE-LCH	lch(63.81, 86.31, 137.18°)
OKLab	oklab(66.74% -0.1717 0.1299)
OKLCH	oklch(66.74% 0.215 142.9)
XYZ	xyz(16.8183, 32.5700, 6.6963)
Luminance	0.3257 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1BB31F #B31BAF

analogous

#63B31B #1BB31F #1BB36B

triadic

#1BB31F #1F1BB3 #B31F1B

tetradic

#1BB31F #1B63B3 #B31BAF #B36B1B

square

#1BB31F #1B63B3 #B31BAF #B36B1B

split-complementary

#1BB31F #6B1BB3 #B31B63

monochromatic

#0B490D #137E16 #1BB31F #2CDF31 #61E765

Accessibility & contrast

On white

2.79

#1BB31F on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.51

#1BB31F on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #1BB31F

7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1BB31F	#FFFFFF	#000000	##000000
##1BB31F	1.00	2.79	7.51	7.51
#FFFFFF	2.79	1.00	21.00	21.00
#000000	7.51	21.00	1.00	1.00
##000000	7.51	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#B7A100

Deuteranopia (green-blind)

#A79633

Tritanopia (blue-blind)

#00AE98

Achromatopsia (no color)

#9B9B9B

Design tokens & code

CSS

--color: #1bb31f;
/* rgb */ color: rgb(27, 179, 31);
/* oklch */ color: oklch(66.7% 0.215 142.9);

Tailwind

colors: {
  custom: {
    50: '#78cb69',
    500: '#1bb31f',
    950: '#000000',
  },
}

SCSS

$custom: #1bb31f;
$custom-light: #78cb69;
$custom-dark: #000000;

JSON

{
  "hex": "#1bb31f",
  "rgb": {
    "r": 27,
    "g": 179,
    "b": 31
  },
  "hsl": {
    "h": 121.579,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.66743,
    "c": 0.2153,
    "h": 142.9
  },
  "luminance": 0.32572
}

Semantic roles & 50–950 ramp

primary

#1BB31F

secondary

#CC5EC9

accent

#37ECF0

background

#F8FCF6

surface

#EFF9EB

border

#CAD2C6

text

#0B1307

muted

#7C827A

Preview Lab

Preview with #1BB31F

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

Preview Lab → · Contrast checker → · Palette generator →