#1BB31B#1BB31B

#1BB31B is a light, highly saturated green. Relative luminance 0.326; OKLCH L 66.7% C 0.217 H 142.7°. Best body text is #000000 at 7.51:1 contrast (WCAG AA passes).

Color values

HEX	#1BB31B
RGB	rgb(27, 179, 27)
HSL	hsl(120, 74%, 40%)
HSV	hsv(120, 85%, 70%)
CMYK	cmyk(84.9%, 0%, 84.9%, 29.8%)
CIE-LAB	lab(63.80, -63.51, 59.67)
CIE-LCH	lch(63.80, 87.15, 136.79°)
OKLab	oklab(66.72% -0.1724 0.1315)
OKLCH	oklch(66.72% 0.217 142.7)
XYZ	xyz(16.7688, 32.5502, 6.4357)
Luminance	0.3255 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1BB31B #B31BB3

analogous

#67B31B #1BB31B #1BB367

triadic

#1BB31B #1B1BB3 #B31B1B

tetradic

#1BB31B #1B67B3 #B31BB3 #B3671B

square

#1BB31B #1B67B3 #B31BB3 #B3671B

split-complementary

#1BB31B #671BB3 #B31B67

monochromatic

#0B490B #137E13 #1BB31B #2CDF2C #61E761

Accessibility & contrast

On white

2.80

#1BB31B on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.51

#1BB31B on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #1BB31B

7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1BB31B	#FFFFFF	#000000	##000000
##1BB31B	1.00	2.80	7.51	7.51
#FFFFFF	2.80	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)

#A89630

Tritanopia (blue-blind)

#00AD98

Achromatopsia (no color)

#9B9B9B

Design tokens & code

CSS

--color: #1bb31b;
/* rgb */ color: rgb(27, 179, 27);
/* oklch */ color: oklch(66.7% 0.217 142.7);

Tailwind

colors: {
  custom: {
    50: '#78cb67',
    500: '#1bb31b',
    950: '#000000',
  },
}

SCSS

$custom: #1bb31b;
$custom-light: #78cb67;
$custom-dark: #000000;

JSON

{
  "hex": "#1bb31b",
  "rgb": {
    "r": 27,
    "g": 179,
    "b": 27
  },
  "hsl": {
    "h": 120,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.66725,
    "c": 0.21682,
    "h": 142.7
  },
  "luminance": 0.32552
}

Semantic roles & 50–950 ramp

primary

#1BB31B

secondary

#CC5ECC

accent

#37F0F0

background

#F8FCF6

surface

#EFF9EB

border

#CAD2C6

text

#0B1307

muted

#7C827A

Preview Lab

Preview with #1BB31B

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

Preview Lab → · Contrast checker → · Palette generator →