#1B2584#1B2584

#1B2584 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 33.1% C 0.156 H 270.0°. Best body text is #FFFFFF at 12.77:1 contrast (WCAG AA passes).

Color values

HEX	#1B2584
RGB	rgb(27, 37, 132)
HSL	hsl(234, 66%, 31%)
HSV	hsv(234, 80%, 52%)
CMYK	cmyk(79.5%, 72%, 0%, 48.2%)
CIE-LAB	lab(20.91, 31.65, -54.02)
CIE-LCH	lch(20.91, 62.61, 300.37°)
OKLab	oklab(33.12% 0.0001 -0.1564)
OKLCH	oklch(33.12% 0.156 270)
XYZ	xyz(5.2770, 3.2215, 22.1690)
Luminance	0.0322 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2584 #847A1B

analogous

#1B5984 #1B2584 #451B84

triadic

#1B2584 #841B25 #25841B

tetradic

#1B2584 #841B59 #847A1B #1B8445

square

#1B2584 #841B59 #847A1B #1B8445

split-complementary

#1B2584 #84451B #59841B

monochromatic

#06091E #111751 #1B2584 #2533B7 #4150D8

Accessibility & contrast

On white

12.77

#1B2584 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1B2584 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2584

12.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2584	#FFFFFF	#000000	##FFFFFF
##1B2584	1.00	12.77	1.64	12.77
#FFFFFF	12.77	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003787

Deuteranopia (green-blind)

#002D82

Tritanopia (blue-blind)

#003F51

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b2584;
/* rgb */ color: rgb(27, 37, 132);
/* oklch */ color: oklch(33.1% 0.156 270.0);

Tailwind

colors: {
  custom: {
    50: '#6b60a9',
    500: '#1b2584',
    950: '#000000',
  },
}

SCSS

$custom: #1b2584;
$custom-light: #6b60a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2584",
  "rgb": {
    "r": 27,
    "g": 37,
    "b": 132
  },
  "hsl": {
    "h": 234.286,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.33115,
    "c": 0.15641,
    "h": 270
  },
  "luminance": 0.03222
}

Semantic roles & 50–950 ramp

primary

#1B2584

secondary

#B7AC43

accent

#D93FE9

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#080510

muted

#7A797F

Preview Lab

Preview with #1B2584

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

Preview Lab → · Contrast checker → · Palette generator →