#1F347D#1F347D

#1F347D is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.5% C 0.127 H 267.4°. Best body text is #FFFFFF at 11.38:1 contrast (WCAG AA passes).

Color values

HEX	#1F347D
RGB	rgb(31, 52, 125)
HSL	hsl(227, 60%, 31%)
HSV	hsv(227, 75%, 49%)
CMYK	cmyk(75.2%, 58.4%, 0%, 51%)
CIE-LAB	lab(24.41, 19.14, -43.87)
CIE-LCH	lch(24.41, 47.87, 293.57°)
OKLab	oklab(35.55% -0.0058 -0.1265)
OKLCH	oklch(35.55% 0.127 267.4)
XYZ	xyz(5.4935, 4.2274, 19.9245)
Luminance	0.0423 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F347D #7D681F

analogous

#1F637D #1F347D #391F7D

triadic

#1F347D #7D1F34 #347D1F

tetradic

#1F347D #7D1F63 #7D681F #1F7D39

square

#1F347D #7D1F63 #7D681F #1F7D39

split-complementary

#1F347D #7D391F #637D1F

monochromatic

#070B1B #13204C #1F347D #2B48AE #4565D1

Accessibility & contrast

On white

11.38

#1F347D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1F347D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F347D

11.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F347D	#FFFFFF	#000000	##FFFFFF
##1F347D	1.00	11.38	1.85	11.38
#FFFFFF	11.38	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7F

Deuteranopia (green-blind)

#00367C

Tritanopia (blue-blind)

#004653

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1f347d;
/* rgb */ color: rgb(31, 52, 125);
/* oklch */ color: oklch(35.5% 0.127 267.4);

Tailwind

colors: {
  custom: {
    50: '#696ba3',
    500: '#1f347d',
    950: '#000000',
  },
}

SCSS

$custom: #1f347d;
$custom-light: #696ba3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f347d",
  "rgb": {
    "r": 31,
    "g": 52,
    "b": 125
  },
  "hsl": {
    "h": 226.596,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.3555,
    "c": 0.1266,
    "h": 267.4
  },
  "luminance": 0.04228
}

Semantic roles & 50–950 ramp

primary

#1F347D

secondary

#B09948

accent

#C044E3

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F347D

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

Preview Lab → · Contrast checker → · Palette generator →