#1B3386#1B3386

#1B3386 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.0% C 0.142 H 266.6°. Best body text is #FFFFFF at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#1B3386
RGB	rgb(27, 51, 134)
HSL	hsl(227, 66%, 32%)
HSV	hsv(227, 80%, 53%)
CMYK	cmyk(79.9%, 61.9%, 0%, 47.5%)
CIE-LAB	lab(24.71, 22.93, -49.05)
CIE-LCH	lch(24.71, 54.15, 295.06°)
OKLab	oklab(35.96% -0.0084 -0.1418)
OKLCH	oklch(35.96% 0.142 266.6)
XYZ	xyz(5.9374, 4.3212, 23.0708)
Luminance	0.0432 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3386 #866E1B

analogous

#1B6986 #1B3386 #391B86

triadic

#1B3386 #861B33 #33861B

tetradic

#1B3386 #861B69 #866E1B #1B8639

square

#1B3386 #861B69 #866E1B #1B8639

split-complementary

#1B3386 #86391B #69861B

monochromatic

#060C20 #112053 #1B3386 #2546B9 #4264D9

Accessibility & contrast

On white

11.26

#1B3386 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1B3386 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3386

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3386	#FFFFFF	#000000	##FFFFFF
##1B3386	1.00	11.26	1.86	11.26
#FFFFFF	11.26	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004089

Deuteranopia (green-blind)

#003684

Tritanopia (blue-blind)

#004857

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b3386;
/* rgb */ color: rgb(27, 51, 134);
/* oklch */ color: oklch(36.0% 0.142 266.6);

Tailwind

colors: {
  custom: {
    50: '#6a6aaa',
    500: '#1b3386',
    950: '#000000',
  },
}

SCSS

$custom: #1b3386;
$custom-light: #6a6aaa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3386",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 134
  },
  "hsl": {
    "h": 226.542,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.35959,
    "c": 0.14201,
    "h": 266.6
  },
  "luminance": 0.04322
}

Semantic roles & 50–950 ramp

primary

#1B3386

secondary

#B99F44

accent

#C33EE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B3386

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

Preview Lab → · Contrast checker → · Palette generator →