#1D578C#1D578C

#1D578C is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.7% C 0.105 H 249.9°. Best body text is #FFFFFF at 7.52:1 contrast (WCAG AA passes).

Color values

HEX	#1D578C
RGB	rgb(29, 87, 140)
HSL	hsl(209, 66%, 33%)
HSV	hsv(209, 79%, 55%)
CMYK	cmyk(79.3%, 37.9%, 0%, 45.1%)
CIE-LAB	lab(35.93, 1.05, -34.68)
CIE-LCH	lch(35.93, 34.70, 271.74°)
OKLab	oklab(44.72% -0.0363 -0.0988)
OKLCH	oklch(44.72% 0.105 249.9)
XYZ	xyz(8.6467, 8.9700, 26.0815)
Luminance	0.0897 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D578C #8C521D

analogous

#1D8C89 #1D578C #1D1F8C

triadic

#1D578C #8C1D57 #578C1D

tetradic

#1D578C #891D8C #8C521D #1F8C1D

square

#1D578C #891D8C #8C521D #1F8C1D

split-complementary

#1D578C #8C1D1F #8C891D

monochromatic

#081827 #123759 #1D578C #2877BF #4A95D9

Accessibility & contrast

On white

7.52

#1D578C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#1D578C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D578C

7.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D578C	#FFFFFF	#000000	##FFFFFF
##1D578C	1.00	7.52	2.79	7.52
#FFFFFF	7.52	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E5A8E

Deuteranopia (green-blind)

#2D508B

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1d578c;
/* rgb */ color: rgb(29, 87, 140);
/* oklch */ color: oklch(44.7% 0.105 249.9);

Tailwind

colors: {
  custom: {
    50: '#6b86ae',
    500: '#1d578c',
    950: '#000000',
  },
}

SCSS

$custom: #1d578c;
$custom-light: #6b86ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d578c",
  "rgb": {
    "r": 29,
    "g": 87,
    "b": 140
  },
  "hsl": {
    "h": 208.649,
    "s": 65.68,
    "l": 33.137
  },
  "oklch": {
    "l": 0.44718,
    "c": 0.10526,
    "h": 249.9
  },
  "luminance": 0.08971
}

Semantic roles & 50–950 ramp

primary

#1D578C

secondary

#BC8049

accent

#903FE9

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080B10

muted

#7A7C7F

Preview Lab

Preview with #1D578C

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

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