#1B3483#1B3483

#1B3483 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.9% C 0.136 H 266.1°. Best body text is #FFFFFF at 11.26:1 contrast (WCAG AA passes).

Color values

HEX	#1B3483
RGB	rgb(27, 52, 131)
HSL	hsl(226, 66%, 31%)
HSV	hsv(226, 79%, 51%)
CMYK	cmyk(79.4%, 60.3%, 0%, 48.6%)
CIE-LAB	lab(24.72, 21.03, -47.14)
CIE-LCH	lch(24.72, 51.62, 294.04°)
OKLab	oklab(35.89% -0.0092 -0.1361)
OKLCH	oklch(35.89% 0.136 266.1)
XYZ	xyz(5.7753, 4.3270, 21.9992)
Luminance	0.0433 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3483 #836A1B

analogous

#1B6883 #1B3483 #361B83

triadic

#1B3483 #831B34 #34831B

tetradic

#1B3483 #831B68 #836A1B #1B8336

square

#1B3483 #831B68 #836A1B #1B8336

split-complementary

#1B3483 #83361B #68831B

monochromatic

#060C1E #112050 #1B3483 #2548B6 #4165D8

Accessibility & contrast

On white

11.26

#1B3483 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1B3483 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3483

11.26:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3483	#FFFFFF	#000000	##FFFFFF
##1B3483	1.00	11.26	1.87	11.26
#FFFFFF	11.26	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.26	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004086

Deuteranopia (green-blind)

#003681

Tritanopia (blue-blind)

#004856

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b3483;
/* rgb */ color: rgb(27, 52, 131);
/* oklch */ color: oklch(35.9% 0.136 266.1);

Tailwind

colors: {
  custom: {
    50: '#696ba8',
    500: '#1b3483',
    950: '#000000',
  },
}

SCSS

$custom: #1b3483;
$custom-light: #696ba8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3483",
  "rgb": {
    "r": 27,
    "g": 52,
    "b": 131
  },
  "hsl": {
    "h": 225.577,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.35892,
    "c": 0.13646,
    "h": 266.1
  },
  "luminance": 0.04328
}

Semantic roles & 50–950 ramp

primary

#1B3483

secondary

#B69B43

accent

#C03FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B3483

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

Preview Lab → · Contrast checker → · Palette generator →