#1D578A#1D578A

#1D578A is a dark, moderate cyan. Relative luminance 0.089; OKLCH L 44.6% C 0.103 H 249.0°. Best body text is #FFFFFF at 7.55:1 contrast (WCAG AA passes).

Color values

HEX	#1D578A
RGB	rgb(29, 87, 138)
HSL	hsl(208, 65%, 33%)
HSV	hsv(208, 79%, 54%)
CMYK	cmyk(79%, 37%, 0%, 45.9%)
CIE-LAB	lab(35.81, 0.27, -33.64)
CIE-LCH	lch(35.81, 33.64, 270.45°)
OKLab	oklab(44.59% -0.0368 -0.0958)
OKLCH	oklch(44.59% 0.103 249)
XYZ	xyz(8.5006, 8.9116, 25.3119)
Luminance	0.0891 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D578A #8A501D

analogous

#1D8A86 #1D578A #1D218A

triadic

#1D578A #8A1D57 #578A1D

tetradic

#1D578A #861D8A #8A501D #218A1D

square

#1D578A #861D8A #8A501D #218A1D

split-complementary

#1D578A #8A1D21 #8A861D

monochromatic

#081725 #123757 #1D578A #2877BD #4995D9

Accessibility & contrast

On white

7.55

#1D578A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.78

#1D578A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D578A

7.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D578A	#FFFFFF	#000000	##FFFFFF
##1D578A	1.00	7.55	2.78	7.55
#FFFFFF	7.55	1.00	21.00	1.00
#000000	2.78	21.00	1.00	21.00
##FFFFFF	7.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F5A8C

Deuteranopia (green-blind)

#2F5089

Tritanopia (blue-blind)

#00636A

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1d578a;
/* rgb */ color: rgb(29, 87, 138);
/* oklch */ color: oklch(44.6% 0.103 249.0);

Tailwind

colors: {
  custom: {
    50: '#6a86ac',
    500: '#1d578a',
    950: '#000000',
  },
}

SCSS

$custom: #1d578a;
$custom-light: #6a86ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1d578a",
  "rgb": {
    "r": 29,
    "g": 87,
    "b": 138
  },
  "hsl": {
    "h": 208.073,
    "s": 65.269,
    "l": 32.745
  },
  "oklch": {
    "l": 0.44593,
    "c": 0.1026,
    "h": 249
  },
  "luminance": 0.08913
}

Semantic roles & 50–950 ramp

primary

#1D578A

secondary

#BB7E48

accent

#8E40E8

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #1D578A

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

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