#1B583B#1B583B

#1B583B is a dark, moderate teal. Relative luminance 0.075; OKLCH L 41.3% C 0.079 H 159.0°. Best body text is #FFFFFF at 8.38:1 contrast (WCAG AA passes).

Color values

HEX	#1B583B
RGB	rgb(27, 88, 59)
HSL	hsl(151, 53%, 23%)
HSV	hsv(151, 69%, 35%)
CMYK	cmyk(69.3%, 0%, 33%, 65.5%)
CIE-LAB	lab(32.98, -27.20, 11.24)
CIE-LCH	lch(32.98, 29.43, 157.55°)
OKLab	oklab(41.28% -0.0742 0.0285)
OKLCH	oklch(41.28% 0.079 159)
XYZ	xyz(4.7307, 7.5277, 5.3405)
Luminance	0.0753 (WCAG relative)
Temperature	neutral
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B583B #581B38

analogous

#1B581C #1B583B #1B5758

triadic

#1B583B #3B1B58 #583B1B

tetradic

#1B583B #1C1B58 #581B38 #57581B

square

#1B583B #1C1B58 #581B38 #57581B

split-complementary

#1B583B #581B57 #581C1B

monochromatic

#071710 #0D291C #1B583B #29875A #38B67A

Accessibility & contrast

On white

8.38

#1B583B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.51

#1B583B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B583B

8.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B583B	#FFFFFF	#000000	##FFFFFF
##1B583B	1.00	8.38	2.51	8.38
#FFFFFF	8.38	1.00	21.00	1.00
#000000	2.51	21.00	1.00	21.00
##FFFFFF	8.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#575139

Deuteranopia (green-blind)

#4F4B3D

Tritanopia (blue-blind)

#005750

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1b583b;
/* rgb */ color: rgb(27, 88, 59);
/* oklch */ color: oklch(41.3% 0.079 159.0);

Tailwind

colors: {
  custom: {
    50: '#5f8871',
    500: '#1b583b',
    950: '#000000',
  },
}

SCSS

$custom: #1b583b;
$custom-light: #5f8871;
$custom-dark: #000000;

JSON

{
  "hex": "#1b583b",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 59
  },
  "hsl": {
    "h": 151.475,
    "s": 53.043,
    "l": 22.549
  },
  "oklch": {
    "l": 0.41278,
    "c": 0.07944,
    "h": 159
  },
  "luminance": 0.07528
}

Semantic roles & 50–950 ramp

primary

#1B583B

secondary

#8E4166

accent

#4B90DC

background

#F5F8F6

surface

#EAEFEC

border

#C6CAC7

text

#050B07

muted

#797C7A

Preview Lab

Preview with #1B583B

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

Preview Lab → · Contrast checker → · Palette generator →