#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
RGBrgb(27, 179, 27)
HSLhsl(120, 74%, 40%)
HSVhsv(120, 85%, 70%)
CMYKcmyk(84.9%, 0%, 84.9%, 29.8%)
CIE-LABlab(63.80, -63.51, 59.67)
CIE-LCHlch(63.80, 87.15, 136.79°)
OKLaboklab(66.72% -0.1724 0.1315)
OKLCHoklch(66.72% 0.217 142.7)
XYZxyz(16.7688, 32.5502, 6.4357)
Luminance0.3255 (WCAG relative)
Temperatureneutral
Familygreen

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
##1BB31B1.002.807.517.51
#FFFFFF2.801.0021.0021.00
#0000007.5121.001.001.00
##0000007.5121.001.001.00

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 →

#1BB31B Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva