#1F578E#1F578E

#1F578E is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 44.9% C 0.107 H 251.2°. Best body text is #FFFFFF at 7.47:1 contrast (WCAG AA passes).

Color values

HEX	#1F578E
RGB	rgb(31, 87, 142)
HSL	hsl(210, 64%, 34%)
HSV	hsv(210, 78%, 56%)
CMYK	cmyk(78.2%, 38.7%, 0%, 44.3%)
CIE-LAB	lab(36.10, 2.09, -35.62)
CIE-LCH	lch(36.10, 35.68, 273.36°)
OKLab	oklab(44.91% -0.0345 -0.1015)
OKLCH	oklch(44.91% 0.107 251.2)
XYZ	xyz(8.8539, 9.0597, 26.8680)
Luminance	0.0906 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F578E #8E561F

analogous

#1F8E8E #1F578E #1F1F8E

triadic

#1F578E #8E1F57 #578E1F

tetradic

#1F578E #8E1F8E #8E561F #1F8E1F

square

#1F578E #8E1F8E #8E561F #1F8E1F

split-complementary

#1F578E #8E1F1F #8E8E1F

monochromatic

#09192A #14385C #1F578E #2A76C0 #4F94D9

Accessibility & contrast

On white

7.47

#1F578E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#1F578E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F578E

7.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F578E	#FFFFFF	#000000	##FFFFFF
##1F578E	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)

#3D5A90

Deuteranopia (green-blind)

#2C508D

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1f578e;
/* rgb */ color: rgb(31, 87, 142);
/* oklch */ color: oklch(44.9% 0.107 251.2);

Tailwind

colors: {
  custom: {
    50: '#6c86af',
    500: '#1f578e',
    950: '#000000',
  },
}

SCSS

$custom: #1f578e;
$custom-light: #6c86af;
$custom-dark: #000000;

JSON

{
  "hex": "#1f578e",
  "rgb": {
    "r": 31,
    "g": 87,
    "b": 142
  },
  "hsl": {
    "h": 209.73,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.44907,
    "c": 0.10727,
    "h": 251.2
  },
  "luminance": 0.09061
}

Semantic roles & 50–950 ramp

primary

#1F578E

secondary

#BB844D

accent

#9341E7

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080B10

muted

#7A7C7F

Preview Lab

Preview with #1F578E

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

Preview Lab → · Contrast checker → · Palette generator →