#1D578E#1D578E

#1D578E is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.8% C 0.108 H 250.7°. Best body text is #FFFFFF at 7.48:1 contrast (WCAG AA passes).

Color values

HEX	#1D578E
RGB	rgb(29, 87, 142)
HSL	hsl(209, 66%, 34%)
HSV	hsv(209, 80%, 56%)
CMYK	cmyk(79.6%, 38.7%, 0%, 44.3%)
CIE-LAB	lab(36.04, 1.84, -35.72)
CIE-LCH	lch(36.04, 35.76, 272.95°)
OKLab	oklab(44.85% -0.0357 -0.1018)
OKLCH	oklch(44.85% 0.108 250.7)
XYZ	xyz(8.7955, 9.0296, 26.8653)
Luminance	0.0903 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D578E #8E541D

analogous

#1D8E8C #1D578E #1D1E8E

triadic

#1D578E #8E1D57 #578E1D

tetradic

#1D578E #8C1D8E #8E541D #1E8E1D

square

#1D578E #8C1D8E #8E541D #1E8E1D

split-complementary

#1D578E #8E1D1E #8E8C1D

monochromatic

#081928 #13385B #1D578E #2776C1 #4B95DA

Accessibility & contrast

On white

7.48

#1D578E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#1D578E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D578E

7.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D578E	#FFFFFF	#000000	##FFFFFF
##1D578E	1.00	7.48	2.81	7.48
#FFFFFF	7.48	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D5A90

Deuteranopia (green-blind)

#2C508D

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1d578e;
/* rgb */ color: rgb(29, 87, 142);
/* oklch */ color: oklch(44.8% 0.108 250.7);

Tailwind

colors: {
  custom: {
    50: '#6b86af',
    500: '#1d578e',
    950: '#000000',
  },
}

SCSS

$custom: #1d578e;
$custom-light: #6b86af;
$custom-dark: #000000;

JSON

{
  "hex": "#1d578e",
  "rgb": {
    "r": 29,
    "g": 87,
    "b": 142
  },
  "hsl": {
    "h": 209.204,
    "s": 66.082,
    "l": 33.529
  },
  "oklch": {
    "l": 0.44845,
    "c": 0.10793,
    "h": 250.7
  },
  "luminance": 0.09031
}

Semantic roles & 50–950 ramp

primary

#1D578E

secondary

#BD824A

accent

#923FE9

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080B10

muted

#7A7C7F

Preview Lab

Preview with #1D578E

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

Preview Lab → · Contrast checker → · Palette generator →