#1B3385#1B3385

#1B3385 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.9% C 0.141 H 266.6°. Best body text is #FFFFFF at 11.30:1 contrast (WCAG AA passes).

Color values

HEX	#1B3385
RGB	rgb(27, 51, 133)
HSL	hsl(226, 66%, 31%)
HSV	hsv(226, 80%, 52%)
CMYK	cmyk(79.7%, 61.7%, 0%, 47.8%)
CIE-LAB	lab(24.62, 22.53, -48.57)
CIE-LCH	lch(24.62, 53.54, 294.89°)
OKLab	oklab(35.87% -0.0084 -0.1403)
OKLCH	oklch(35.87% 0.141 266.6)
XYZ	xyz(5.8680, 4.2935, 22.7052)
Luminance	0.0429 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3385 #856D1B

analogous

#1B6885 #1B3385 #381B85

triadic

#1B3385 #851B33 #33851B

tetradic

#1B3385 #851B68 #856D1B #1B8538

square

#1B3385 #851B68 #856D1B #1B8538

split-complementary

#1B3385 #85381B #68851B

monochromatic

#060C1F #111F52 #1B3385 #2547B8 #4264D9

Accessibility & contrast

On white

11.30

#1B3385 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1B3385 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3385

11.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3385	#FFFFFF	#000000	##FFFFFF
##1B3385	1.00	11.30	1.86	11.30
#FFFFFF	11.30	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004088

Deuteranopia (green-blind)

#003683

Tritanopia (blue-blind)

#004857

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b3385;
/* rgb */ color: rgb(27, 51, 133);
/* oklch */ color: oklch(35.9% 0.141 266.6);

Tailwind

colors: {
  custom: {
    50: '#6a6aa9',
    500: '#1b3385',
    950: '#000000',
  },
}

SCSS

$custom: #1b3385;
$custom-light: #6a6aa9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3385",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 133
  },
  "hsl": {
    "h": 226.415,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.35867,
    "c": 0.1406,
    "h": 266.6
  },
  "luminance": 0.04294
}

Semantic roles & 50–950 ramp

primary

#1B3385

secondary

#B89E44

accent

#C33FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B3385

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

Preview Lab → · Contrast checker → · Palette generator →