#1D337F#1D337F

#1D337F is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.4% C 0.131 H 267.0°. Best body text is #FFFFFF at 11.46:1 contrast (WCAG AA passes).

Color values

HEX	#1D337F
RGB	rgb(29, 51, 127)
HSL	hsl(227, 63%, 31%)
HSV	hsv(227, 77%, 50%)
CMYK	cmyk(77.2%, 59.8%, 0%, 50.2%)
CIE-LAB	lab(24.20, 20.37, -45.49)
CIE-LCH	lch(24.20, 49.84, 294.13°)
OKLab	oklab(35.42% -0.0068 -0.1313)
OKLCH	oklch(35.42% 0.131 267)
XYZ	xyz(5.5200, 4.1606, 20.5867)
Luminance	0.0416 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D337F #7F691D

analogous

#1D647F #1D337F #381D7F

triadic

#1D337F #7F1D33 #337F1D

tetradic

#1D337F #7F1D64 #7F691D #1D7F38

square

#1D337F #7F1D64 #7F691D #1D7F38

split-complementary

#1D337F #7F381D #647F1D

monochromatic

#060B1B #121F4D #1D337F #2847B1 #4263D4

Accessibility & contrast

On white

11.46

#1D337F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1D337F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D337F

11.46:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D337F	#FFFFFF	#000000	##FFFFFF
##1D337F	1.00	11.46	1.83	11.46
#FFFFFF	11.46	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.46	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E82

Deuteranopia (green-blind)

#00357E

Tritanopia (blue-blind)

#004653

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1d337f;
/* rgb */ color: rgb(29, 51, 127);
/* oklch */ color: oklch(35.4% 0.131 267.0);

Tailwind

colors: {
  custom: {
    50: '#696aa5',
    500: '#1d337f',
    950: '#000000',
  },
}

SCSS

$custom: #1d337f;
$custom-light: #696aa5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d337f",
  "rgb": {
    "r": 29,
    "g": 51,
    "b": 127
  },
  "hsl": {
    "h": 226.531,
    "s": 62.821,
    "l": 30.588
  },
  "oklch": {
    "l": 0.35415,
    "c": 0.13144,
    "h": 267
  },
  "luminance": 0.04161
}

Semantic roles & 50–950 ramp

primary

#1D337F

secondary

#B29A45

accent

#C142E6

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1D337F

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

Preview Lab → · Contrast checker → · Palette generator →