#1B575A#1B575A

#1B575A is a dark, moderate teal. Relative luminance 0.078; OKLCH L 42.0% C 0.060 H 199.9°. Best body text is #FFFFFF at 8.21:1 contrast (WCAG AA passes).

Color values

HEX	#1B575A
RGB	rgb(27, 87, 90)
HSL	hsl(183, 54%, 23%)
HSV	hsv(183, 70%, 35%)
CMYK	cmyk(70%, 3.3%, 0%, 64.7%)
CIE-LAB	lab(33.54, -17.75, -7.38)
CIE-LCH	lch(33.54, 19.22, 202.59°)
OKLab	oklab(42.03% -0.0567 -0.0205)
OKLCH	oklch(42.03% 0.06 199.9)
XYZ	xyz(5.7048, 7.7870, 10.8733)
Luminance	0.0779 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B575A #5A1E1B

analogous

#1B5A3D #1B575A #1B375A

triadic

#1B575A #5A1B57 #575A1B

tetradic

#1B575A #3D1B5A #5A1E1B #375A1B

square

#1B575A #3D1B5A #5A1E1B #375A1B

split-complementary

#1B575A #5A1B37 #5A3D1B

monochromatic

#071718 #0D292B #1B575A #298589 #37B2B8

Accessibility & contrast

On white

8.21

#1B575A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#1B575A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B575A

8.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B575A	#FFFFFF	#000000	##FFFFFF
##1B575A	1.00	8.21	2.56	8.21
#FFFFFF	8.21	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#50535A

Deuteranopia (green-blind)

#474C5A

Tritanopia (blue-blind)

#005A58

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #1b575a;
/* rgb */ color: rgb(27, 87, 90);
/* oklch */ color: oklch(42.0% 0.060 199.9);

Tailwind

colors: {
  custom: {
    50: '#618688',
    500: '#1b575a',
    950: '#000000',
  },
}

SCSS

$custom: #1b575a;
$custom-light: #618688;
$custom-dark: #000000;

JSON

{
  "hex": "#1b575a",
  "rgb": {
    "r": 27,
    "g": 87,
    "b": 90
  },
  "hsl": {
    "h": 182.857,
    "s": 53.846,
    "l": 22.941
  },
  "oklch": {
    "l": 0.4203,
    "c": 0.06026,
    "h": 199.9
  },
  "luminance": 0.07788
}

Semantic roles & 50–950 ramp

primary

#1B575A

secondary

#904541

accent

#524BDD

background

#F6F8F8

surface

#EBEFEF

border

#C6CACA

text

#050B0B

muted

#7A7C7C

Preview Lab

Preview with #1B575A

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

Preview Lab → · Contrast checker → · Palette generator →