#1D578D#1D578D

#1D578D is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.8% C 0.107 H 250.3°. Best body text is #FFFFFF at 7.50:1 contrast (WCAG AA passes).

Color values

HEX	#1D578D
RGB	rgb(29, 87, 141)
HSL	hsl(209, 66%, 33%)
HSV	hsv(209, 79%, 55%)
CMYK	cmyk(79.4%, 38.3%, 0%, 44.7%)
CIE-LAB	lab(35.98, 1.45, -35.20)
CIE-LCH	lch(35.98, 35.23, 272.35°)
OKLab	oklab(44.78% -0.036 -0.1003)
OKLCH	oklch(44.78% 0.107 250.3)
XYZ	xyz(8.7208, 8.9997, 26.4716)
Luminance	0.0900 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D578D #8D531D

analogous

#1D8D8B #1D578D #1D1F8D

triadic

#1D578D #8D1D57 #578D1D

tetradic

#1D578D #8B1D8D #8D531D #1F8D1D

square

#1D578D #8B1D8D #8D531D #1F8D1D

split-complementary

#1D578D #8D1D1F #8D8B1D

monochromatic

#081827 #13385A #1D578D #2776C0 #4B95DA

Accessibility & contrast

On white

7.50

#1D578D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#1D578D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D578D

7.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D578D	#FFFFFF	#000000	##FFFFFF
##1D578D	1.00	7.50	2.80	7.50
#FFFFFF	7.50	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E5A8F

Deuteranopia (green-blind)

#2D508C

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1d578d;
/* rgb */ color: rgb(29, 87, 141);
/* oklch */ color: oklch(44.8% 0.107 250.3);

Tailwind

colors: {
  custom: {
    50: '#6b86ae',
    500: '#1d578d',
    950: '#000000',
  },
}

SCSS

$custom: #1d578d;
$custom-light: #6b86ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d578d",
  "rgb": {
    "r": 29,
    "g": 87,
    "b": 141
  },
  "hsl": {
    "h": 208.929,
    "s": 65.882,
    "l": 33.333
  },
  "oklch": {
    "l": 0.44782,
    "c": 0.10659,
    "h": 250.3
  },
  "luminance": 0.09001
}

Semantic roles & 50–950 ramp

primary

#1D578D

secondary

#BC814A

accent

#913FE9

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080B10

muted

#7A7C7F

Preview Lab

Preview with #1D578D

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

Preview Lab → · Contrast checker → · Palette generator →