#1F578A#1F578A

#1F578A is a dark, moderate cyan. Relative luminance 0.089; OKLCH L 44.7% C 0.102 H 249.5°. Best body text is #FFFFFF at 7.53:1 contrast (WCAG AA passes).

Color values

HEX	#1F578A
RGB	rgb(31, 87, 138)
HSL	hsl(209, 63%, 33%)
HSV	hsv(209, 78%, 54%)
CMYK	cmyk(77.5%, 37%, 0%, 45.9%)
CIE-LAB	lab(35.87, 0.53, -33.55)
CIE-LCH	lch(35.87, 33.55, 270.90°)
OKLab	oklab(44.66% -0.0357 -0.0955)
OKLCH	oklch(44.66% 0.102 249.5)
XYZ	xyz(8.5590, 8.9417, 25.3147)
Luminance	0.0894 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F578A #8A521F

analogous

#1F8A87 #1F578A #1F218A

triadic

#1F578A #8A1F57 #578A1F

tetradic

#1F578A #871F8A #8A521F #218A1F

square

#1F578A #871F8A #8A521F #218A1F

split-complementary

#1F578A #8A1F21 #8A871F

monochromatic

#091826 #143758 #1F578A #2A77BC #4C95D7

Accessibility & contrast

On white

7.53

#1F578A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.79

#1F578A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F578A

7.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F578A	#FFFFFF	#000000	##FFFFFF
##1F578A	1.00	7.53	2.79	7.53
#FFFFFF	7.53	1.00	21.00	1.00
#000000	2.79	21.00	1.00	21.00
##FFFFFF	7.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F5A8C

Deuteranopia (green-blind)

#305089

Tritanopia (blue-blind)

#00636A

Achromatopsia (no color)

#545454

Design tokens & code

CSS

--color: #1f578a;
/* rgb */ color: rgb(31, 87, 138);
/* oklch */ color: oklch(44.7% 0.102 249.5);

Tailwind

colors: {
  custom: {
    50: '#6b86ac',
    500: '#1f578a',
    950: '#000000',
  },
}

SCSS

$custom: #1f578a;
$custom-light: #6b86ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1f578a",
  "rgb": {
    "r": 31,
    "g": 87,
    "b": 138
  },
  "hsl": {
    "h": 208.598,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.44655,
    "c": 0.10191,
    "h": 249.5
  },
  "luminance": 0.08943
}

Semantic roles & 50–950 ramp

primary

#1F578A

secondary

#BA804B

accent

#9041E6

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #1F578A

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

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