#131F3F#131F3F

#131F3F is a very dark, moderate blue. Relative luminance 0.015; OKLCH L 24.8% C 0.063 H 266.4°. Best body text is #FFFFFF at 16.21:1 contrast (WCAG AA passes).

Color values

HEX	#131F3F
RGB	rgb(19, 31, 63)
HSL	hsl(224, 54%, 16%)
HSV	hsv(224, 70%, 25%)
CMYK	cmyk(69.8%, 50.8%, 0%, 75.3%)
CIE-LAB	lab(12.46, 6.92, -22.06)
CIE-LCH	lch(12.46, 23.12, 287.42°)
OKLab	oklab(24.78% -0.004 -0.0629)
OKLCH	oklch(24.78% 0.063 266.4)
XYZ	xyz(1.6554, 1.4772, 4.8995)
Luminance	0.0148 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#131F3F #3F3313

analogous

#13353F #131F3F #1D133F

triadic

#131F3F #3F131F #1F3F13

tetradic

#131F3F #3F1335 #3F3313 #133F1D

square

#131F3F #3F1335 #3F3313 #133F1D

split-complementary

#131F3F #3F1D13 #353F13

monochromatic

#070C18 #070C18 #131F3F #21366E #2F4D9D

Accessibility & contrast

On white

16.21

#131F3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#131F3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #131F3F

16.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##131F3F	#FFFFFF	#000000	##FFFFFF
##131F3F	1.00	16.21	1.30	16.21
#FFFFFF	16.21	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#102340

Deuteranopia (green-blind)

#091F3E

Tritanopia (blue-blind)

#00262B

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #131f3f;
/* rgb */ color: rgb(19, 31, 63);
/* oklch */ color: oklch(24.8% 0.063 266.4);

Tailwind

colors: {
  custom: {
    50: '#565a74',
    500: '#131f3f',
    950: '#000000',
  },
}

SCSS

$custom: #131f3f;
$custom-light: #565a74;
$custom-dark: #000000;

JSON

{
  "hex": "#131f3f",
  "rgb": {
    "r": 19,
    "g": 31,
    "b": 63
  },
  "hsl": {
    "h": 223.636,
    "s": 53.659,
    "l": 16.078
  },
  "oklch": {
    "l": 0.24779,
    "c": 0.06306,
    "h": 266.4
  },
  "luminance": 0.01477
}

Semantic roles & 50–950 ramp

primary

#131F3F

secondary

#786636

accent

#B54BDD

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #131F3F

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

Preview Lab → · Contrast checker → · Palette generator →