#1B3185#1B3185

#1B3185 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.5% C 0.143 H 267.2°. Best body text is #FFFFFF at 11.51:1 contrast (WCAG AA passes).

Color values

HEX	#1B3185
RGB	rgb(27, 49, 133)
HSL	hsl(228, 66%, 31%)
HSV	hsv(228, 80%, 52%)
CMYK	cmyk(79.7%, 63.2%, 0%, 47.8%)
CIE-LAB	lab(24.07, 23.93, -49.46)
CIE-LCH	lch(24.07, 54.94, 295.82°)
OKLab	oklab(35.46% -0.0071 -0.143)
OKLCH	oklch(35.46% 0.143 267.2)
XYZ	xyz(5.7825, 4.1224, 22.6767)
Luminance	0.0412 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3185 #856F1B

analogous

#1B6685 #1B3185 #3A1B85

triadic

#1B3185 #851B31 #31851B

tetradic

#1B3185 #851B66 #856F1B #1B853A

square

#1B3185 #851B66 #856F1B #1B853A

split-complementary

#1B3185 #853A1B #66851B

monochromatic

#060C1F #111E52 #1B3185 #2544B8 #4261D9

Accessibility & contrast

On white

11.51

#1B3185 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1B3185 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3185

11.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3185	#FFFFFF	#000000	##FFFFFF
##1B3185	1.00	11.51	1.82	11.51
#FFFFFF	11.51	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E88

Deuteranopia (green-blind)

#003483

Tritanopia (blue-blind)

#004756

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1b3185;
/* rgb */ color: rgb(27, 49, 133);
/* oklch */ color: oklch(35.5% 0.143 267.2);

Tailwind

colors: {
  custom: {
    50: '#6a68a9',
    500: '#1b3185',
    950: '#000000',
  },
}

SCSS

$custom: #1b3185;
$custom-light: #6a68a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3185",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 133
  },
  "hsl": {
    "h": 227.547,
    "s": 66.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.3546,
    "c": 0.14317,
    "h": 267.2
  },
  "luminance": 0.04123
}

Semantic roles & 50–950 ramp

primary

#1B3185

secondary

#B8A044

accent

#C63FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B3185

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

Preview Lab → · Contrast checker → · Palette generator →