#1F4A71#1F4A71

#1F4A71 is a dark, moderate cyan. Relative luminance 0.064; OKLCH L 39.9% C 0.082 H 248.6°. Best body text is #FFFFFF at 9.23:1 contrast (WCAG AA passes).

Color values

HEX	#1F4A71
RGB	rgb(31, 74, 113)
HSL	hsl(209, 57%, 28%)
HSV	hsv(209, 73%, 44%)
CMYK	cmyk(72.6%, 34.5%, 0%, 55.7%)
CIE-LAB	lab(30.35, -0.78, -26.79)
CIE-LCH	lch(30.35, 26.80, 268.32°)
OKLab	oklab(39.87% -0.0297 -0.0759)
OKLCH	oklch(39.87% 0.082 248.6)
XYZ	xyz(5.9934, 6.3805, 16.5353)
Luminance	0.0638 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4A71 #71461F

analogous

#1F716F #1F4A71 #1F2171

triadic

#1F4A71 #711F4A #4A711F

tetradic

#1F4A71 #6F1F71 #71461F #21711F

square

#1F4A71 #6F1F71 #71461F #21711F

split-complementary

#1F4A71 #711F21 #716F1F

monochromatic

#071018 #122B41 #1F4A71 #2C69A1 #4089CB

Accessibility & contrast

On white

9.23

#1F4A71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.28

#1F4A71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4A71

9.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4A71	#FFFFFF	#000000	##FFFFFF
##1F4A71	1.00	9.23	2.28	9.23
#FFFFFF	9.23	1.00	21.00	1.00
#000000	2.28	21.00	1.00	21.00
##FFFFFF	9.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#394C73

Deuteranopia (green-blind)

#2D4470

Tritanopia (blue-blind)

#005358

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f4a71;
/* rgb */ color: rgb(31, 74, 113);
/* oklch */ color: oklch(39.9% 0.082 248.6);

Tailwind

colors: {
  custom: {
    50: '#657c9a',
    500: '#1f4a71',
    950: '#000000',
  },
}

SCSS

$custom: #1f4a71;
$custom-light: #657c9a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4a71",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 113
  },
  "hsl": {
    "h": 208.537,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.39868,
    "c": 0.08151,
    "h": 248.6
  },
  "luminance": 0.06381
}

Semantic roles & 50–950 ramp

primary

#1F4A71

secondary

#A57447

accent

#9048E0

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#06090E

muted

#7A7B7E

Preview Lab

Preview with #1F4A71

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

Preview Lab → · Contrast checker → · Palette generator →