#131F5B#131F5B

#131F5B is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.3% C 0.108 H 269.1°. Best body text is #FFFFFF at 15.27:1 contrast (WCAG AA passes).

Color values

HEX	#131F5B
RGB	rgb(19, 31, 91)
HSL	hsl(230, 65%, 22%)
HSV	hsv(230, 79%, 36%)
CMYK	cmyk(79.1%, 65.9%, 0%, 64.3%)
CIE-LAB	lab(14.81, 18.74, -37.47)
CIE-LCH	lch(14.81, 41.90, 296.58°)
OKLab	oklab(27.29% -0.0016 -0.1082)
OKLCH	oklch(27.29% 0.108 269.1)
XYZ	xyz(2.6462, 1.8735, 10.1177)
Luminance	0.0187 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#131F5B #5B4F13

analogous

#13435B #131F5B #2B135B

triadic

#131F5B #5B131F #1F5B13

tetradic

#131F5B #5B1343 #5B4F13 #135B2B

square

#131F5B #5B1343 #5B4F13 #135B2B

split-complementary

#131F5B #5B2B13 #435B13

monochromatic

#050919 #080E28 #131F5B #1E308E #2841C0

Accessibility & contrast

On white

15.27

#131F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#131F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #131F5B

15.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##131F5B	#FFFFFF	#000000	##FFFFFF
##131F5B	1.00	15.27	1.37	15.27
#FFFFFF	15.27	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00295D

Deuteranopia (green-blind)

#00225A

Tritanopia (blue-blind)

#002E39

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #131f5b;
/* rgb */ color: rgb(19, 31, 91);
/* oklch */ color: oklch(27.3% 0.108 269.1);

Tailwind

colors: {
  custom: {
    50: '#5d5a8a',
    500: '#131f5b',
    950: '#000000',
  },
}

SCSS

$custom: #131f5b;
$custom-light: #5d5a8a;
$custom-dark: #000000;

JSON

{
  "hex": "#131f5b",
  "rgb": {
    "r": 19,
    "g": 31,
    "b": 91
  },
  "hsl": {
    "h": 230,
    "s": 65.455,
    "l": 21.569
  },
  "oklch": {
    "l": 0.27288,
    "c": 0.10824,
    "h": 269.1
  },
  "luminance": 0.01874
}

Semantic roles & 50–950 ramp

primary

#131F5B

secondary

#938437

accent

#CC3FE8

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #131F5B

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

Preview Lab → · Contrast checker → · Palette generator →