#1B3084#1B3084

#1B3084 is a dark, vivid blue. Relative luminance 0.040; OKLCH L 35.2% C 0.143 H 267.4°. Best body text is #FFFFFF at 11.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B3084
RGB	rgb(27, 48, 132)
HSL	hsl(228, 66%, 31%)
HSV	hsv(228, 80%, 52%)
CMYK	cmyk(79.5%, 63.6%, 0%, 48.2%)
CIE-LAB	lab(23.71, 24.22, -49.42)
CIE-LCH	lch(23.71, 55.04, 296.11°)
OKLab	oklab(35.17% -0.0064 -0.1429)
OKLCH	oklch(35.17% 0.143 267.4)
XYZ	xyz(5.6724, 4.0122, 22.3008)
Luminance	0.0401 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3084 #846F1B

analogous

#1B6484 #1B3084 #3A1B84

triadic

#1B3084 #841B30 #30841B

tetradic

#1B3084 #841B64 #846F1B #1B843A

square

#1B3084 #841B64 #846F1B #1B843A

split-complementary

#1B3084 #843A1B #64841B

monochromatic

#060B1E #111E51 #1B3084 #2542B7 #415FD8

Accessibility & contrast

On white

11.65

#1B3084 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1B3084 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3084

11.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3084	#FFFFFF	#000000	##FFFFFF
##1B3084	1.00	11.65	1.80	11.65
#FFFFFF	11.65	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003D87

Deuteranopia (green-blind)

#003482

Tritanopia (blue-blind)

#004655

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b3084;
/* rgb */ color: rgb(27, 48, 132);
/* oklch */ color: oklch(35.2% 0.143 267.4);

Tailwind

colors: {
  custom: {
    50: '#6a68a9',
    500: '#1b3084',
    950: '#000000',
  },
}

SCSS

$custom: #1b3084;
$custom-light: #6a68a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3084",
  "rgb": {
    "r": 27,
    "g": 48,
    "b": 132
  },
  "hsl": {
    "h": 228,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.35165,
    "c": 0.14303,
    "h": 267.4
  },
  "luminance": 0.04013
}

Semantic roles & 50–950 ramp

primary

#1B3084

secondary

#B7A043

accent

#C73FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#070610

muted

#7A7A7F

Preview Lab

Preview with #1B3084

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

Preview Lab → · Contrast checker → · Palette generator →