#131B5B#131B5B

#131B5B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.114 H 270.7°. Best body text is #FFFFFF at 15.72:1 contrast (WCAG AA passes).

Color values

HEX	#131B5B
RGB	rgb(19, 27, 91)
HSL	hsl(233, 65%, 22%)
HSV	hsv(233, 79%, 36%)
CMYK	cmyk(79.1%, 70.3%, 0%, 64.3%)
CIE-LAB	lab(13.69, 21.66, -39.29)
CIE-LCH	lch(13.69, 44.87, 298.86°)
OKLab	oklab(26.47% 0.0014 -0.1136)
OKLCH	oklch(26.47% 0.114 270.7)
XYZ	xyz(2.5482, 1.6774, 10.0850)
Luminance	0.0168 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#131B5B #5B5313

analogous

#133F5B #131B5B #2F135B

triadic

#131B5B #5B131B #1B5B13

tetradic

#131B5B #5B133F #5B5313 #135B2F

square

#131B5B #5B133F #5B5313 #135B2F

split-complementary

#131B5B #5B2F13 #3F5B13

monochromatic

#050819 #080C28 #131B5B #1E2A8E #2839C0

Accessibility & contrast

On white

15.72

#131B5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#131B5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #131B5B

15.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##131B5B	#FFFFFF	#000000	##FFFFFF
##131B5B	1.00	15.72	1.34	15.72
#FFFFFF	15.72	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265D

Deuteranopia (green-blind)

#00205A

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #131b5b;
/* rgb */ color: rgb(19, 27, 91);
/* oklch */ color: oklch(26.5% 0.114 270.7);

Tailwind

colors: {
  custom: {
    50: '#5e578a',
    500: '#131b5b',
    950: '#000000',
  },
}

SCSS

$custom: #131b5b;
$custom-light: #5e578a;
$custom-dark: #000000;

JSON

{
  "hex": "#131b5b",
  "rgb": {
    "r": 19,
    "g": 27,
    "b": 91
  },
  "hsl": {
    "h": 233.333,
    "s": 65.455,
    "l": 21.569
  },
  "oklch": {
    "l": 0.26467,
    "c": 0.11362,
    "h": 270.7
  },
  "luminance": 0.01678
}

Semantic roles & 50–950 ramp

primary

#131B5B

secondary

#938937

accent

#D63FE8

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #131B5B

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

Preview Lab → · Contrast checker → · Palette generator →