#1B3285#1B3285

#1B3285 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.7% C 0.142 H 266.9°. Best body text is #FFFFFF at 11.40:1 contrast (WCAG AA passes).

Color values

HEX	#1B3285
RGB	rgb(27, 50, 133)
HSL	hsl(227, 66%, 31%)
HSV	hsv(227, 80%, 52%)
CMYK	cmyk(79.7%, 62.4%, 0%, 47.8%)
CIE-LAB	lab(24.34, 23.23, -49.02)
CIE-LCH	lch(24.34, 54.24, 295.36°)
OKLab	oklab(35.66% -0.0077 -0.1417)
OKLCH	oklch(35.66% 0.142 266.9)
XYZ	xyz(5.8248, 4.2070, 22.6908)
Luminance	0.0421 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3285 #856E1B

analogous

#1B6785 #1B3285 #391B85

triadic

#1B3285 #851B32 #32851B

tetradic

#1B3285 #851B67 #856E1B #1B8539

square

#1B3285 #851B67 #856E1B #1B8539

split-complementary

#1B3285 #85391B #67851B

monochromatic

#060C1F #111F52 #1B3285 #2545B8 #4263D9

Accessibility & contrast

On white

11.40

#1B3285 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#1B3285 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3285

11.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3285	#FFFFFF	#000000	##FFFFFF
##1B3285	1.00	11.40	1.84	11.40
#FFFFFF	11.40	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F88

Deuteranopia (green-blind)

#003583

Tritanopia (blue-blind)

#004756

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3285;
/* rgb */ color: rgb(27, 50, 133);
/* oklch */ color: oklch(35.7% 0.142 266.9);

Tailwind

colors: {
  custom: {
    50: '#6a69a9',
    500: '#1b3285',
    950: '#000000',
  },
}

SCSS

$custom: #1b3285;
$custom-light: #6a69a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3285",
  "rgb": {
    "r": 27,
    "g": 50,
    "b": 133
  },
  "hsl": {
    "h": 226.981,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.35662,
    "c": 0.14188,
    "h": 266.9
  },
  "luminance": 0.04208
}

Semantic roles & 50–950 ramp

primary

#1B3285

secondary

#B89F44

accent

#C43FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B3285

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

Preview Lab → · Contrast checker → · Palette generator →