#1B3689#1B3689

#1B3689 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.9% C 0.142 H 265.8°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B3689
RGB	rgb(27, 54, 137)
HSL	hsl(225, 67%, 32%)
HSV	hsv(225, 80%, 54%)
CMYK	cmyk(80.3%, 60.6%, 0%, 46.3%)
CIE-LAB	lab(25.79, 22.04, -49.15)
CIE-LCH	lch(25.79, 53.86, 294.16°)
OKLab	oklab(36.85% -0.0104 -0.142)
OKLCH	oklch(36.85% 0.142 265.8)
XYZ	xyz(6.2849, 4.6768, 24.2335)
Luminance	0.0468 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3689 #896E1B

analogous

#1B6D89 #1B3689 #371B89

triadic

#1B3689 #891B36 #36891B

tetradic

#1B3689 #891B6D #896E1B #1B8937

square

#1B3689 #891B6D #896E1B #1B8937

split-complementary

#1B3689 #89371B #6D891B

monochromatic

#070E23 #112256 #1B3689 #254ABC #4469DA

Accessibility & contrast

On white

10.85

#1B3689 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1B3689 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3689

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3689	#FFFFFF	#000000	##FFFFFF
##1B3689	1.00	10.85	1.94	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428C

Deuteranopia (green-blind)

#003887

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b3689;
/* rgb */ color: rgb(27, 54, 137);
/* oklch */ color: oklch(36.9% 0.142 265.8);

Tailwind

colors: {
  custom: {
    50: '#6a6cac',
    500: '#1b3689',
    950: '#000000',
  },
}

SCSS

$custom: #1b3689;
$custom-light: #6a6cac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3689",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 137
  },
  "hsl": {
    "h": 225.273,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.36851,
    "c": 0.14238,
    "h": 265.8
  },
  "luminance": 0.04677
}

Semantic roles & 50–950 ramp

primary

#1B3689

secondary

#BC9E44

accent

#C03EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1B3689

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

Preview Lab → · Contrast checker → · Palette generator →