#1B3189#1B3189

#1B3189 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.8% C 0.149 H 267.3°. Best body text is #FFFFFF at 11.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B3189
RGB	rgb(27, 49, 137)
HSL	hsl(228, 67%, 32%)
HSV	hsv(228, 80%, 54%)
CMYK	cmyk(80.3%, 64.2%, 0%, 46.3%)
CIE-LAB	lab(24.43, 25.51, -51.37)
CIE-LCH	lch(24.43, 57.35, 296.41°)
OKLab	oklab(35.84% -0.0071 -0.1486)
OKLCH	oklch(35.84% 0.149 267.3)
XYZ	xyz(6.0641, 4.2351, 24.1599)
Luminance	0.0424 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3189 #89731B

analogous

#1B6889 #1B3189 #3C1B89

triadic

#1B3189 #891B31 #31891B

tetradic

#1B3189 #891B68 #89731B #1B893C

square

#1B3189 #891B68 #89731B #1B893C

split-complementary

#1B3189 #893C1B #68891B

monochromatic

#070C23 #111F56 #1B3189 #2543BC #4462DA

Accessibility & contrast

On white

11.37

#1B3189 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1B3189 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3189

11.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3189	#FFFFFF	#000000	##FFFFFF
##1B3189	1.00	11.37	1.85	11.37
#FFFFFF	11.37	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F8C

Deuteranopia (green-blind)

#003587

Tritanopia (blue-blind)

#004858

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3189;
/* rgb */ color: rgb(27, 49, 137);
/* oklch */ color: oklch(35.8% 0.149 267.3);

Tailwind

colors: {
  custom: {
    50: '#6b68ac',
    500: '#1b3189',
    950: '#000000',
  },
}

SCSS

$custom: #1b3189;
$custom-light: #6b68ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3189",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 137
  },
  "hsl": {
    "h": 228,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.3584,
    "c": 0.14875,
    "h": 267.3
  },
  "luminance": 0.04236
}

Semantic roles & 50–950 ramp

primary

#1B3189

secondary

#BCA444

accent

#C83EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B3189

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

Preview Lab → · Contrast checker → · Palette generator →