#131B5A#131B5A

#131B5A is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.4% C 0.112 H 270.7°. Best body text is #FFFFFF at 15.77:1 contrast (WCAG AA passes).

Color values

HEX	#131B5A
RGB	rgb(19, 27, 90)
HSL	hsl(233, 65%, 21%)
HSV	hsv(233, 79%, 35%)
CMYK	cmyk(78.9%, 70%, 0%, 64.7%)
CIE-LAB	lab(13.59, 21.25, -38.79)
CIE-LCH	lch(13.59, 44.23, 298.72°)
OKLab	oklab(26.36% 0.0014 -0.1121)
OKLCH	oklch(26.36% 0.112 270.7)
XYZ	xyz(2.5053, 1.6602, 9.8593)
Luminance	0.0166 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#131B5A #5A5213

analogous

#133F5A #131B5A #2F135A

triadic

#131B5A #5A131B #1B5A13

tetradic

#131B5A #5A133F #5A5213 #135A2F

square

#131B5A #5A133F #5A5213 #135A2F

split-complementary

#131B5A #5A2F13 #3F5A13

monochromatic

#050819 #080C27 #131B5A #1E2A8D #2839BF

Accessibility & contrast

On white

15.77

#131B5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#131B5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #131B5A

15.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##131B5A	#FFFFFF	#000000	##FFFFFF
##131B5A	1.00	15.77	1.33	15.77
#FFFFFF	15.77	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265C

Deuteranopia (green-blind)

#001F59

Tritanopia (blue-blind)

#002C37

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #131b5a;
/* rgb */ color: rgb(19, 27, 90);
/* oklch */ color: oklch(26.4% 0.112 270.7);

Tailwind

colors: {
  custom: {
    50: '#5d5789',
    500: '#131b5a',
    950: '#000000',
  },
}

SCSS

$custom: #131b5a;
$custom-light: #5d5789;
$custom-dark: #000000;

JSON

{
  "hex": "#131b5a",
  "rgb": {
    "r": 19,
    "g": 27,
    "b": 90
  },
  "hsl": {
    "h": 233.239,
    "s": 65.138,
    "l": 21.373
  },
  "oklch": {
    "l": 0.26362,
    "c": 0.11214,
    "h": 270.7
  },
  "luminance": 0.0166
}

Semantic roles & 50–950 ramp

primary

#131B5A

secondary

#928837

accent

#D540E8

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #131B5A

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

Preview Lab → · Contrast checker → · Palette generator →