#131F4B#131F4B

#131F4B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.8% C 0.083 H 268.5°. Best body text is #FFFFFF at 15.85:1 contrast (WCAG AA passes).

Color values

HEX	#131F4B
RGB	rgb(19, 31, 75)
HSL	hsl(227, 60%, 18%)
HSV	hsv(227, 75%, 29%)
CMYK	cmyk(74.7%, 58.7%, 0%, 70.6%)
CIE-LAB	lab(13.39, 12.01, -28.92)
CIE-LCH	lch(13.39, 31.31, 292.54°)
OKLab	oklab(25.78% -0.0022 -0.0831)
OKLCH	oklch(25.78% 0.083 268.5)
XYZ	xyz(2.0281, 1.6262, 6.8623)
Luminance	0.0163 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#131F4B #4B3F13

analogous

#133B4B #131F4B #23134B

triadic

#131F4B #4B131F #1F4B13

tetradic

#131F4B #4B133B #4B3F13 #134B23

square

#131F4B #4B133B #4B3F13 #134B23

split-complementary

#131F4B #4B2313 #3B4B13

monochromatic

#060A18 #070B1A #131F4B #1F337C #2C47AD

Accessibility & contrast

On white

15.85

#131F4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#131F4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #131F4B

15.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##131F4B	#FFFFFF	#000000	##FFFFFF
##131F4B	1.00	15.85	1.33	15.85
#FFFFFF	15.85	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03254D

Deuteranopia (green-blind)

#00204A

Tritanopia (blue-blind)

#002931

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #131f4b;
/* rgb */ color: rgb(19, 31, 75);
/* oklch */ color: oklch(25.8% 0.083 268.5);

Tailwind

colors: {
  custom: {
    50: '#595a7e',
    500: '#131f4b',
    950: '#000000',
  },
}

SCSS

$custom: #131f4b;
$custom-light: #595a7e;
$custom-dark: #000000;

JSON

{
  "hex": "#131f4b",
  "rgb": {
    "r": 19,
    "g": 31,
    "b": 75
  },
  "hsl": {
    "h": 227.143,
    "s": 59.574,
    "l": 18.431
  },
  "oklch": {
    "l": 0.25781,
    "c": 0.08314,
    "h": 268.5
  },
  "luminance": 0.01626
}

Semantic roles & 50–950 ramp

primary

#131F4B

secondary

#847336

accent

#C145E3

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #131F4B

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

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