#1F901B#1F901B

#1F901B is a mid, vivid green. Relative luminance 0.203; OKLCH L 57.1% C 0.179 H 142.5°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#1F901B
RGB	rgb(31, 144, 27)
HSL	hsl(118, 68%, 34%)
HSV	hsv(118, 81%, 56%)
CMYK	cmyk(78.5%, 0%, 81.3%, 43.5%)
CIE-LAB	lab(52.19, -52.24, 48.98)
CIE-LCH	lch(52.19, 71.61, 136.84°)
OKLab	oklab(57.08% -0.142 0.1091)
OKLCH	oklch(57.08% 0.179 142.5)
XYZ	xyz(10.7355, 20.3157, 4.3922)
Luminance	0.2032 (WCAG relative)
Temperature	neutral
Family	green

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F901B #8C1B90

analogous

#59901B #1F901B #1B9051

triadic

#1F901B #1B1F90 #901B1F

tetradic

#1F901B #1B5990 #8C1B90 #90511B

square

#1F901B #1B5990 #8C1B90 #90511B

split-complementary

#1F901B #511B90 #901B59

monochromatic

#092908 #145C11 #1F901B #2AC425 #4EDD49

Accessibility & contrast

On white

4.15

#1F901B on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#1F901B on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #1F901B

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F901B	#FFFFFF	#000000	##000000
##1F901B	1.00	4.15	5.06	5.06
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.06	21.00	1.00	1.00
##000000	5.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#938200

Deuteranopia (green-blind)

#877929

Tritanopia (blue-blind)

#008B7A

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #1f901b;
/* rgb */ color: rgb(31, 144, 27);
/* oklch */ color: oklch(57.1% 0.179 142.5);

Tailwind

colors: {
  custom: {
    50: '#70b262',
    500: '#1f901b',
    950: '#000000',
  },
}

SCSS

$custom: #1f901b;
$custom-light: #70b262;
$custom-dark: #000000;

JSON

{
  "hex": "#1f901b",
  "rgb": {
    "r": 31,
    "g": 144,
    "b": 27
  },
  "hsl": {
    "h": 117.949,
    "s": 68.421,
    "l": 33.529
  },
  "oklch": {
    "l": 0.5708,
    "c": 0.17907,
    "h": 142.5
  },
  "luminance": 0.20317
}

Semantic roles & 50–950 ramp

primary

#1F901B

secondary

#BB48BF

accent

#3DEBE5

background

#F7FBF6

surface

#EDF6EB

border

#C8D0C6

text

#091105

muted

#7B807A

Preview Lab

Preview with #1F901B

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

Preview Lab → · Contrast checker → · Palette generator →