#1F437D#1F437D

#1F437D is a dark, moderate blue. Relative luminance 0.058; OKLCH L 38.9% C 0.107 H 259.5°. Best body text is #FFFFFF at 9.73:1 contrast (WCAG AA passes).

Color values

HEX	#1F437D
RGB	rgb(31, 67, 125)
HSL	hsl(217, 60%, 31%)
HSV	hsv(217, 75%, 49%)
CMYK	cmyk(75.2%, 46.4%, 0%, 51%)
CIE-LAB	lab(28.86, 8.67, -36.68)
CIE-LCH	lch(28.86, 37.70, 283.30°)
OKLab	oklab(38.94% -0.0194 -0.105)
OKLCH	oklch(38.94% 0.107 259.5)
XYZ	xyz(6.2726, 5.7856, 20.1842)
Luminance	0.0579 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F437D #7D591F

analogous

#1F727D #1F437D #2A1F7D

triadic

#1F437D #7D1F43 #437D1F

tetradic

#1F437D #7D1F72 #7D591F #1F7D2A

square

#1F437D #7D1F72 #7D591F #1F7D2A

split-complementary

#1F437D #7D2A1F #727D1F

monochromatic

#070E1B #13294C #1F437D #2B5DAE #457BD1

Accessibility & contrast

On white

9.73

#1F437D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1F437D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F437D

9.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F437D	#FFFFFF	#000000	##FFFFFF
##1F437D	1.00	9.73	2.16	9.73
#FFFFFF	9.73	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#26497F

Deuteranopia (green-blind)

#13407C

Tritanopia (blue-blind)

#00515A

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f437d;
/* rgb */ color: rgb(31, 67, 125);
/* oklch */ color: oklch(38.9% 0.107 259.5);

Tailwind

colors: {
  custom: {
    50: '#6876a3',
    500: '#1f437d',
    950: '#000000',
  },
}

SCSS

$custom: #1f437d;
$custom-light: #6876a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f437d",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 125
  },
  "hsl": {
    "h": 217.021,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.38944,
    "c": 0.10681,
    "h": 259.5
  },
  "luminance": 0.05786
}

Semantic roles & 50–950 ramp

primary

#1F437D

secondary

#B08848

accent

#A744E3

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F437D

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

Preview Lab → · Contrast checker → · Palette generator →