#1B3D86#1B3D86

#1B3D86 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 38.1% C 0.129 H 263.0°. Best body text is #FFFFFF at 10.20:1 contrast (WCAG AA passes).

Color values

HEX	#1B3D86
RGB	rgb(27, 61, 134)
HSL	hsl(221, 66%, 32%)
HSV	hsv(221, 80%, 53%)
CMYK	cmyk(79.9%, 54.5%, 0%, 47.5%)
CIE-LAB	lab(27.55, 15.94, -44.43)
CIE-LCH	lch(27.55, 47.20, 289.74°)
OKLab	oklab(38.1% -0.0158 -0.128)
OKLCH	oklch(38.1% 0.129 263)
XYZ	xyz(6.4223, 5.2910, 23.2324)
Luminance	0.0529 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3D86 #86641B

analogous

#1B7386 #1B3D86 #2F1B86

triadic

#1B3D86 #861B3D #3D861B

tetradic

#1B3D86 #861B73 #86641B #1B862F

square

#1B3D86 #861B73 #86641B #1B862F

split-complementary

#1B3D86 #862F1B #73861B

monochromatic

#060F20 #112653 #1B3D86 #2554B9 #4272D9

Accessibility & contrast

On white

10.20

#1B3D86 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#1B3D86 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3D86

10.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3D86	#FFFFFF	#000000	##FFFFFF
##1B3D86	1.00	10.20	2.06	10.20
#FFFFFF	10.20	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#064689

Deuteranopia (green-blind)

#003C85

Tritanopia (blue-blind)

#004F5B

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b3d86;
/* rgb */ color: rgb(27, 61, 134);
/* oklch */ color: oklch(38.1% 0.129 263.0);

Tailwind

colors: {
  custom: {
    50: '#6971aa',
    500: '#1b3d86',
    950: '#000000',
  },
}

SCSS

$custom: #1b3d86;
$custom-light: #6971aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3d86",
  "rgb": {
    "r": 27,
    "g": 61,
    "b": 134
  },
  "hsl": {
    "h": 220.935,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.38097,
    "c": 0.12898,
    "h": 263
  },
  "luminance": 0.05292
}

Semantic roles & 50–950 ramp

primary

#1B3D86

secondary

#B99444

accent

#B33EE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3D86

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

Preview Lab → · Contrast checker → · Palette generator →