#1D3F87#1D3F87

#1D3F87 is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.7% C 0.127 H 262.9°. Best body text is #FFFFFF at 9.94:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F87
RGB	rgb(29, 63, 135)
HSL	hsl(221, 65%, 32%)
HSV	hsv(221, 79%, 53%)
CMYK	cmyk(78.5%, 53.3%, 0%, 47.1%)
CIE-LAB	lab(28.29, 15.20, -43.85)
CIE-LCH	lch(28.29, 46.41, 289.12°)
OKLab	oklab(38.7% -0.0158 -0.1262)
OKLCH	oklch(38.7% 0.127 262.9)
XYZ	xyz(6.6558, 5.5647, 23.6403)
Luminance	0.0556 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F87 #87651D

analogous

#1D7487 #1D3F87 #301D87

triadic

#1D3F87 #871D3F #3F871D

tetradic

#1D3F87 #871D74 #87651D #1D8730

square

#1D3F87 #871D74 #87651D #1D8730

split-complementary

#1D3F87 #87301D #74871D

monochromatic

#071022 #122755 #1D3F87 #2857B9 #4775D7

Accessibility & contrast

On white

9.94

#1D3F87 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1D3F87 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F87

9.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F87	#FFFFFF	#000000	##FFFFFF
##1D3F87	1.00	9.94	2.11	9.94
#FFFFFF	9.94	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E488A

Deuteranopia (green-blind)

#003E86

Tritanopia (blue-blind)

#00505C

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1d3f87;
/* rgb */ color: rgb(29, 63, 135);
/* oklch */ color: oklch(38.7% 0.127 262.9);

Tailwind

colors: {
  custom: {
    50: '#6a73aa',
    500: '#1d3f87',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f87;
$custom-light: #6a73aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f87",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 135
  },
  "hsl": {
    "h": 220.755,
    "s": 64.634,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38704,
    "c": 0.12721,
    "h": 262.9
  },
  "luminance": 0.05565
}

Semantic roles & 50–950 ramp

primary

#1D3F87

secondary

#B99546

accent

#B240E8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1D3F87

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

Preview Lab → · Contrast checker → · Palette generator →