#1D578F#1D578F

#1D578F is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.9% C 0.109 H 251.1°. Best body text is #FFFFFF at 7.47:1 contrast (WCAG AA passes).

Color values

HEX	#1D578F
RGB	rgb(29, 87, 143)
HSL	hsl(209, 66%, 34%)
HSV	hsv(209, 80%, 56%)
CMYK	cmyk(79.7%, 39.2%, 0%, 43.9%)
CIE-LAB	lab(36.10, 2.24, -36.23)
CIE-LCH	lch(36.10, 36.30, 273.53°)
OKLab	oklab(44.91% -0.0354 -0.1034)
OKLCH	oklch(44.91% 0.109 251.1)
XYZ	xyz(8.8709, 9.0597, 27.2624)
Luminance	0.0906 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D578F #8F551D

analogous

#1D8F8E #1D578F #1D1E8F

triadic

#1D578F #8F1D57 #578F1D

tetradic

#1D578F #8E1D8F #8F551D #1E8F1D

square

#1D578F #8E1D8F #8F551D #1E8F1D

split-complementary

#1D578F #8F1D1E #8F8E1D

monochromatic

#081929 #13385C #1D578F #2776C2 #4C94DB

Accessibility & contrast

On white

7.47

#1D578F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#1D578F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D578F

7.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D578F	#FFFFFF	#000000	##FFFFFF
##1D578F	1.00	7.47	2.81	7.47
#FFFFFF	7.47	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C5B91

Deuteranopia (green-blind)

#2B508E

Tritanopia (blue-blind)

#00646C

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1d578f;
/* rgb */ color: rgb(29, 87, 143);
/* oklch */ color: oklch(44.9% 0.109 251.1);

Tailwind

colors: {
  custom: {
    50: '#6b86b0',
    500: '#1d578f',
    950: '#000000',
  },
}

SCSS

$custom: #1d578f;
$custom-light: #6b86b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d578f",
  "rgb": {
    "r": 29,
    "g": 87,
    "b": 143
  },
  "hsl": {
    "h": 209.474,
    "s": 66.279,
    "l": 33.725
  },
  "oklch": {
    "l": 0.44909,
    "c": 0.10927,
    "h": 251.1
  },
  "luminance": 0.09061
}

Semantic roles & 50–950 ramp

primary

#1D578F

secondary

#BD834B

accent

#923FE9

background

#F6F8FA

surface

#ECEFF5

border

#C7CACF

text

#080B10

muted

#7A7C7F

Preview Lab

Preview with #1D578F

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

Preview Lab → · Contrast checker → · Palette generator →