#1B504B#1B504B

#1B504B is a dark, muted teal. Relative luminance 0.065; OKLCH L 39.5% C 0.056 H 186.5°. Best body text is #FFFFFF at 9.15:1 contrast (WCAG AA passes).

Color values

HEX	#1B504B
RGB	rgb(27, 80, 75)
HSL	hsl(174, 50%, 21%)
HSV	hsv(174, 66%, 31%)
CMYK	cmyk(66.3%, 0%, 6.2%, 68.6%)
CIE-LAB	lab(30.59, -18.73, -2.25)
CIE-LCH	lch(30.59, 18.86, 186.86°)
OKLab	oklab(39.47% -0.0558 -0.0064)
OKLCH	oklch(39.47% 0.056 186.5)
XYZ	xyz(4.5901, 6.4779, 7.6637)
Luminance	0.0648 (WCAG relative)
Temperature	cool
Family	teal

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B504B #501B20

analogous

#1B5030 #1B504B #1B3A50

triadic

#1B504B #4B1B50 #504B1B

tetradic

#1B504B #301B50 #501B20 #3A501B

square

#1B504B #301B50 #501B20 #3A501B

split-complementary

#1B504B #501B3A #50301B

monochromatic

#081715 #0C2220 #1B504B #2A7E76 #3AACA1

Accessibility & contrast

On white

9.15

#1B504B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#1B504B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B504B

9.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B504B	#FFFFFF	#000000	##FFFFFF
##1B504B	1.00	9.15	2.30	9.15
#FFFFFF	9.15	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4C4B4B

Deuteranopia (green-blind)

#44454C

Tritanopia (blue-blind)

#00524E

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #1b504b;
/* rgb */ color: rgb(27, 80, 75);
/* oklch */ color: oklch(39.5% 0.056 186.5);

Tailwind

colors: {
  custom: {
    50: '#5f817d',
    500: '#1b504b',
    950: '#000000',
  },
}

SCSS

$custom: #1b504b;
$custom-light: #5f817d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b504b",
  "rgb": {
    "r": 27,
    "g": 80,
    "b": 75
  },
  "hsl": {
    "h": 174.34,
    "s": 49.533,
    "l": 20.98
  },
  "oklch": {
    "l": 0.39471,
    "c": 0.05612,
    "h": 186.5
  },
  "luminance": 0.06478
}

Semantic roles & 50–950 ramp

primary

#1B504B

secondary

#864147

accent

#4F5CD9

background

#F5F7F7

surface

#EAEEEE

border

#C6C9C9

text

#050A09

muted

#797C7B

Preview Lab

Preview with #1B504B

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

Preview Lab → · Contrast checker → · Palette generator →