#1B3A89#1B3A89

#1B3A89 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.7% C 0.137 H 264.5°. Best body text is #FFFFFF at 10.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B3A89
RGB	rgb(27, 58, 137)
HSL	hsl(223, 67%, 32%)
HSV	hsv(223, 80%, 54%)
CMYK	cmyk(80.3%, 57.7%, 0%, 46.3%)
CIE-LAB	lab(26.92, 19.26, -47.32)
CIE-LCH	lch(26.92, 51.08, 292.15°)
OKLab	oklab(37.7% -0.0133 -0.1365)
OKLCH	oklch(37.7% 0.137 264.5)
XYZ	xyz(6.4788, 5.0645, 24.2982)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3A89 #896A1B

analogous

#1B7189 #1B3A89 #331B89

triadic

#1B3A89 #891B3A #3A891B

tetradic

#1B3A89 #891B71 #896A1B #1B8933

square

#1B3A89 #891B71 #896A1B #1B8933

split-complementary

#1B3A89 #89331B #71891B

monochromatic

#070F23 #112456 #1B3A89 #2550BC #446EDA

Accessibility & contrast

On white

10.43

#1B3A89 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1B3A89 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3A89

10.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3A89	#FFFFFF	#000000	##FFFFFF
##1B3A89	1.00	10.43	2.01	10.43
#FFFFFF	10.43	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458C

Deuteranopia (green-blind)

#003B87

Tritanopia (blue-blind)

#004E5B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b3a89;
/* rgb */ color: rgb(27, 58, 137);
/* oklch */ color: oklch(37.7% 0.137 264.5);

Tailwind

colors: {
  custom: {
    50: '#6a6fac',
    500: '#1b3a89',
    950: '#000000',
  },
}

SCSS

$custom: #1b3a89;
$custom-light: #6a6fac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3a89",
  "rgb": {
    "r": 27,
    "g": 58,
    "b": 137
  },
  "hsl": {
    "h": 223.091,
    "s": 67.073,
    "l": 32.157
  },
  "oklch": {
    "l": 0.37695,
    "c": 0.13719,
    "h": 264.5
  },
  "luminance": 0.05065
}

Semantic roles & 50–950 ramp

primary

#1B3A89

secondary

#BC9A44

accent

#B93EEA

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1B3A89

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

Preview Lab → · Contrast checker → · Palette generator →