#131FBB#131FBB

#131FBB is a dark, highly saturated blue. Relative luminance 0.047; OKLCH L 38.4% C 0.230 H 266.6°. Best body text is #FFFFFF at 10.82:1 contrast (WCAG AA passes).

Color values

HEX	#131FBB
RGB	rgb(19, 31, 187)
HSL	hsl(236, 82%, 40%)
HSV	hsv(236, 90%, 73%)
CMYK	cmyk(89.8%, 83.4%, 0%, 26.7%)
CIE-LAB	lab(25.88, 53.35, -79.38)
CIE-LCH	lch(25.88, 95.64, 303.91°)
OKLab	oklab(38.4% -0.0137 -0.2299)
OKLCH	oklch(38.4% 0.23 266.6)
XYZ	xyz(9.7251, 4.7050, 47.3997)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#131FBB #BBAF13

analogous

#1373BB #131FBB #5B13BB

triadic

#131FBB #BB131F #1FBB13

tetradic

#131FBB #BB1373 #BBAF13 #13BB5B

square

#131FBB #BB1373 #BBAF13 #13BB5B

split-complementary

#131FBB #BB5B13 #73BB13

monochromatic

#080D4C #0D1683 #131FBB #2331E9 #5A65EE

Accessibility & contrast

On white

10.82

#131FBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#131FBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #131FBB

10.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##131FBB	#FFFFFF	#000000	##FFFFFF
##131FBB	1.00	10.82	1.94	10.82
#FFFFFF	10.82	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0046BF

Deuteranopia (green-blind)

#0034B8

Tritanopia (blue-blind)

#005370

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #131fbb;
/* rgb */ color: rgb(19, 31, 187);
/* oklch */ color: oklch(38.4% 0.230 266.6);

Tailwind

colors: {
  custom: {
    50: '#795fd1',
    500: '#131fbb',
    950: '#000000',
  },
}

SCSS

$custom: #131fbb;
$custom-light: #795fd1;
$custom-dark: #000000;

JSON

{
  "hex": "#131fbb",
  "rgb": {
    "r": 19,
    "g": 31,
    "b": 187
  },
  "hsl": {
    "h": 235.714,
    "s": 81.553,
    "l": 40.392
  },
  "oklch": {
    "l": 0.38403,
    "c": 0.23033,
    "h": 266.6
  },
  "luminance": 0.04706
}

Semantic roles & 50–950 ramp

primary

#131FBB

secondary

#D1C958

accent

#EA30F8

background

#F8F5FD

surface

#EFEAFA

border

#CAC6D3

text

#0B0514

muted

#7C7983

Preview Lab

Preview with #131FBB

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

Preview Lab → · Contrast checker → · Palette generator →