#1D337B#1D337B

#1D337B is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.1% C 0.126 H 266.8°. Best body text is #FFFFFF at 11.59:1 contrast (WCAG AA passes).

Color values

HEX	#1D337B
RGB	rgb(29, 51, 123)
HSL	hsl(226, 62%, 30%)
HSV	hsv(226, 76%, 48%)
CMYK	cmyk(76.4%, 58.5%, 0%, 51.8%)
CIE-LAB	lab(23.86, 18.77, -43.50)
CIE-LCH	lch(23.86, 47.38, 293.34°)
OKLab	oklab(35.06% -0.007 -0.1254)
OKLCH	oklch(35.06% 0.126 266.8)
XYZ	xyz(5.2644, 4.0584, 19.2409)
Luminance	0.0406 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D337B #7B651D

analogous

#1D627B #1D337B #361D7B

triadic

#1D337B #7B1D33 #337B1D

tetradic

#1D337B #7B1D62 #7B651D #1D7B36

square

#1D337B #7B1D62 #7B651D #1D7B36

split-complementary

#1D337B #7B361D #627B1D

monochromatic

#060A19 #111E49 #1D337B #2948AD #4062D2

Accessibility & contrast

On white

11.59

#1D337B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.81

#1D337B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D337B

11.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D337B	#FFFFFF	#000000	##FFFFFF
##1D337B	1.00	11.59	1.81	11.59
#FFFFFF	11.59	1.00	21.00	1.00
#000000	1.81	21.00	1.00	21.00
##FFFFFF	11.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D7D

Deuteranopia (green-blind)

#00357A

Tritanopia (blue-blind)

#004551

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1d337b;
/* rgb */ color: rgb(29, 51, 123);
/* oklch */ color: oklch(35.1% 0.126 266.8);

Tailwind

colors: {
  custom: {
    50: '#686aa2',
    500: '#1d337b',
    950: '#000000',
  },
}

SCSS

$custom: #1d337b;
$custom-light: #686aa2;
$custom-dark: #000000;

JSON

{
  "hex": "#1d337b",
  "rgb": {
    "r": 29,
    "g": 51,
    "b": 123
  },
  "hsl": {
    "h": 225.957,
    "s": 61.842,
    "l": 29.804
  },
  "oklch": {
    "l": 0.35062,
    "c": 0.12562,
    "h": 266.8
  },
  "luminance": 0.04059
}

Semantic roles & 50–950 ramp

primary

#1D337B

secondary

#AF9645

accent

#BF43E5

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1D337B

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

Preview Lab → · Contrast checker → · Palette generator →