#1B3986#1B3986

#1B3986 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.2% C 0.134 H 264.6°. Best body text is #FFFFFF at 10.63:1 contrast (WCAG AA passes).

Color values

HEX	#1B3986
RGB	rgb(27, 57, 134)
HSL	hsl(223, 66%, 32%)
HSV	hsv(223, 80%, 53%)
CMYK	cmyk(79.9%, 57.5%, 0%, 47.5%)
CIE-LAB	lab(26.39, 18.74, -46.31)
CIE-LCH	lch(26.39, 49.96, 292.03°)
OKLab	oklab(37.22% -0.0127 -0.1336)
OKLCH	oklch(37.22% 0.134 264.6)
XYZ	xyz(6.2167, 4.8798, 23.1639)
Luminance	0.0488 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3986 #86681B

analogous

#1B6F86 #1B3986 #331B86

triadic

#1B3986 #861B39 #39861B

tetradic

#1B3986 #861B6F #86681B #1B8633

square

#1B3986 #861B6F #86681B #1B8633

split-complementary

#1B3986 #86331B #6F861B

monochromatic

#060E20 #112353 #1B3986 #254FB9 #426DD9

Accessibility & contrast

On white

10.63

#1B3986 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1B3986 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3986

10.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3986	#FFFFFF	#000000	##FFFFFF
##1B3986	1.00	10.63	1.98	10.63
#FFFFFF	10.63	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004489

Deuteranopia (green-blind)

#003A84

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b3986;
/* rgb */ color: rgb(27, 57, 134);
/* oklch */ color: oklch(37.2% 0.134 264.6);

Tailwind

colors: {
  custom: {
    50: '#696eaa',
    500: '#1b3986',
    950: '#000000',
  },
}

SCSS

$custom: #1b3986;
$custom-light: #696eaa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3986",
  "rgb": {
    "r": 27,
    "g": 57,
    "b": 134
  },
  "hsl": {
    "h": 223.178,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.3722,
    "c": 0.13421,
    "h": 264.6
  },
  "luminance": 0.0488
}

Semantic roles & 50–950 ramp

primary

#1B3986

secondary

#B99844

accent

#B93EE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1B3986

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

Preview Lab → · Contrast checker → · Palette generator →