#1D578B#1D578B

#1D578B is a dark, moderate cyan. Relative luminance 0.089; OKLCH L 44.7% C 0.104 H 249.4°. Best body text is #FFFFFF at 7.53:1 contrast (WCAG AA passes).

Color values

HEX	#1D578B
RGB	rgb(29, 87, 139)
HSL	hsl(208, 65%, 33%)
HSV	hsv(208, 79%, 55%)
CMYK	cmyk(79.1%, 37.4%, 0%, 45.5%)
CIE-LAB	lab(35.87, 0.66, -34.16)
CIE-LCH	lch(35.87, 34.17, 271.11°)
OKLab	oklab(44.66% -0.0365 -0.0973)
OKLCH	oklch(44.66% 0.104 249.4)
XYZ	xyz(8.5733, 8.9407, 25.6950)
Luminance	0.0894 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D578B #8B511D

analogous

#1D8B88 #1D578B #1D208B

triadic

#1D578B #8B1D57 #578B1D

tetradic

#1D578B #881D8B #8B511D #208B1D

square

#1D578B #881D8B #8B511D #208B1D

split-complementary

#1D578B #8B1D20 #8B881D

monochromatic

#081826 #123758 #1D578B #2877BE #4995D9

Accessibility & contrast

On white

7.53

#1D578B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#1D578B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D578B

7.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D578B	#FFFFFF	#000000	##FFFFFF
##1D578B	1.00	7.53	2.79	7.53
#FFFFFF	7.53	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F5A8D

Deuteranopia (green-blind)

#2E508A

Tritanopia (blue-blind)

#00636A

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1d578b;
/* rgb */ color: rgb(29, 87, 139);
/* oklch */ color: oklch(44.7% 0.104 249.4);

Tailwind

colors: {
  custom: {
    50: '#6a86ad',
    500: '#1d578b',
    950: '#000000',
  },
}

SCSS

$custom: #1d578b;
$custom-light: #6a86ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d578b",
  "rgb": {
    "r": 29,
    "g": 87,
    "b": 139
  },
  "hsl": {
    "h": 208.364,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.44655,
    "c": 0.10393,
    "h": 249.4
  },
  "luminance": 0.08942
}

Semantic roles & 50–950 ramp

primary

#1D578B

secondary

#BB7F49

accent

#8F3FE8

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #1D578B

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

Preview Lab → · Contrast checker → · Palette generator →