#1B2D83#1B2D83

#1B2D83 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.5% C 0.145 H 268.3°. Best body text is #FFFFFF at 12.00:1 contrast (WCAG AA passes).

Color values

HEX	#1B2D83
RGB	rgb(27, 45, 131)
HSL	hsl(230, 66%, 31%)
HSV	hsv(230, 79%, 51%)
CMYK	cmyk(79.4%, 65.6%, 0%, 48.6%)
CIE-LAB	lab(22.82, 25.90, -50.26)
CIE-LCH	lch(22.82, 56.54, 297.27°)
OKLab	oklab(34.48% -0.0044 -0.1454)
OKLCH	oklch(34.48% 0.145 268.3)
XYZ	xyz(5.4857, 3.7479, 21.9026)
Luminance	0.0375 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2D83 #83711B

analogous

#1B6183 #1B2D83 #3D1B83

triadic

#1B2D83 #831B2D #2D831B

tetradic

#1B2D83 #831B61 #83711B #1B833D

square

#1B2D83 #831B61 #83711B #1B833D

split-complementary

#1B2D83 #833D1B #61831B

monochromatic

#060A1E #111C50 #1B2D83 #253EB6 #415BD8

Accessibility & contrast

On white

12.00

#1B2D83 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1B2D83 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2D83

12.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2D83	#FFFFFF	#000000	##FFFFFF
##1B2D83	1.00	12.00	1.75	12.00
#FFFFFF	12.00	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B86

Deuteranopia (green-blind)

#003281

Tritanopia (blue-blind)

#004453

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b2d83;
/* rgb */ color: rgb(27, 45, 131);
/* oklch */ color: oklch(34.5% 0.145 268.3);

Tailwind

colors: {
  custom: {
    50: '#6a65a8',
    500: '#1b2d83',
    950: '#000000',
  },
}

SCSS

$custom: #1b2d83;
$custom-light: #6a65a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2d83",
  "rgb": {
    "r": 27,
    "g": 45,
    "b": 131
  },
  "hsl": {
    "h": 229.615,
    "s": 65.823,
    "l": 30.98
  },
  "oklch": {
    "l": 0.34478,
    "c": 0.14544,
    "h": 268.3
  },
  "luminance": 0.03748
}

Semantic roles & 50–950 ramp

primary

#1B2D83

secondary

#B6A343

accent

#CB3FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070510

muted

#7A7A7F

Preview Lab

Preview with #1B2D83

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

Preview Lab → · Contrast checker → · Palette generator →