#1B3A86#1B3A86

#1B3A86 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.4% C 0.133 H 264.2°. Best body text is #FFFFFF at 10.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B3A86
RGB	rgb(27, 58, 134)
HSL	hsl(223, 66%, 32%)
HSV	hsv(223, 80%, 53%)
CMYK	cmyk(79.9%, 56.7%, 0%, 47.5%)
CIE-LAB	lab(26.68, 18.04, -45.84)
CIE-LCH	lch(26.68, 49.26, 291.48°)
OKLab	oklab(37.44% -0.0135 -0.1322)
OKLCH	oklch(37.44% 0.133 264.2)
XYZ	xyz(6.2666, 4.9796, 23.1805)
Luminance	0.0498 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3A86 #86671B

analogous

#1B7086 #1B3A86 #321B86

triadic

#1B3A86 #861B3A #3A861B

tetradic

#1B3A86 #861B70 #86671B #1B8632

square

#1B3A86 #861B70 #86671B #1B8632

split-complementary

#1B3A86 #86321B #70861B

monochromatic

#060E20 #112453 #1B3A86 #2550B9 #426ED9

Accessibility & contrast

On white

10.52

#1B3A86 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1B3A86 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3A86

10.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3A86	#FFFFFF	#000000	##FFFFFF
##1B3A86	1.00	10.52	2.00	10.52
#FFFFFF	10.52	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004489

Deuteranopia (green-blind)

#003A85

Tritanopia (blue-blind)

#004D5A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1b3a86;
/* rgb */ color: rgb(27, 58, 134);
/* oklch */ color: oklch(37.4% 0.133 264.2);

Tailwind

colors: {
  custom: {
    50: '#696faa',
    500: '#1b3a86',
    950: '#000000',
  },
}

SCSS

$custom: #1b3a86;
$custom-light: #696faa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3a86",
  "rgb": {
    "r": 27,
    "g": 58,
    "b": 134
  },
  "hsl": {
    "h": 222.617,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.37437,
    "c": 0.13291,
    "h": 264.2
  },
  "luminance": 0.0498
}

Semantic roles & 50–950 ramp

primary

#1B3A86

secondary

#B99744

accent

#B83EE9

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3A86

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

Preview Lab → · Contrast checker → · Palette generator →