#1B3586#1B3586

#1B3586 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.4% C 0.139 H 266.0°. Best body text is #FFFFFF at 11.05:1 contrast (WCAG AA passes).

Color values

HEX	#1B3586
RGB	rgb(27, 53, 134)
HSL	hsl(225, 66%, 32%)
HSV	hsv(225, 80%, 53%)
CMYK	cmyk(79.9%, 60.4%, 0%, 47.5%)
CIE-LAB	lab(25.26, 21.54, -48.15)
CIE-LCH	lch(25.26, 52.75, 294.10°)
OKLab	oklab(36.37% -0.0098 -0.1391)
OKLCH	oklch(36.37% 0.139 266)
XYZ	xyz(6.0267, 4.4998, 23.1005)
Luminance	0.0450 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3586 #866C1B

analogous

#1B6B86 #1B3586 #371B86

triadic

#1B3586 #861B35 #35861B

tetradic

#1B3586 #861B6B #866C1B #1B8637

square

#1B3586 #861B6B #866C1B #1B8637

split-complementary

#1B3586 #86371B #6B861B

monochromatic

#060D20 #112153 #1B3586 #2549B9 #4267D9

Accessibility & contrast

On white

11.05

#1B3586 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#1B3586 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3586

11.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3586	#FFFFFF	#000000	##FFFFFF
##1B3586	1.00	11.05	1.90	11.05
#FFFFFF	11.05	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004189

Deuteranopia (green-blind)

#003784

Tritanopia (blue-blind)

#004958

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1b3586;
/* rgb */ color: rgb(27, 53, 134);
/* oklch */ color: oklch(36.4% 0.139 266.0);

Tailwind

colors: {
  custom: {
    50: '#6a6baa',
    500: '#1b3586',
    950: '#000000',
  },
}

SCSS

$custom: #1b3586;
$custom-light: #6a6baa;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3586",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 134
  },
  "hsl": {
    "h": 225.421,
    "s": 66.46,
    "l": 31.569
  },
  "oklch": {
    "l": 0.36372,
    "c": 0.13942,
    "h": 266
  },
  "luminance": 0.045
}

Semantic roles & 50–950 ramp

primary

#1B3586

secondary

#B99D44

accent

#C03EE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B3586

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

Preview Lab → · Contrast checker → · Palette generator →