#131F81#131F81

#131F81 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.4% C 0.161 H 268.2°. Best body text is #FFFFFF at 13.63:1 contrast (WCAG AA passes).

Color values

HEX	#131F81
RGB	rgb(19, 31, 129)
HSL	hsl(233, 74%, 29%)
HSV	hsv(233, 85%, 51%)
CMYK	cmyk(85.3%, 76%, 0%, 49.4%)
CIE-LAB	lab(18.81, 33.73, -55.60)
CIE-LCH	lch(18.81, 65.03, 301.24°)
OKLab	oklab(31.41% -0.0049 -0.1611)
OKLCH	oklch(31.41% 0.161 268.2)
XYZ	xyz(4.7196, 2.7028, 21.0376)
Luminance	0.0270 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#131F81 #817513

analogous

#135681 #131F81 #3E1381

triadic

#131F81 #81131F #1F8113

tetradic

#131F81 #811356 #817513 #13813E

square

#131F81 #811356 #817513 #13813E

split-complementary

#131F81 #813E13 #568113

monochromatic

#04061B #0B124C #131F81 #1B2CB6 #2E42E0

Accessibility & contrast

On white

13.63

#131F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#131F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #131F81

13.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##131F81	#FFFFFF	#000000	##FFFFFF
##131F81	1.00	13.63	1.54	13.63
#FFFFFF	13.63	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003384

Deuteranopia (green-blind)

#00287F

Tritanopia (blue-blind)

#003C4E

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #131f81;
/* rgb */ color: rgb(19, 31, 129);
/* oklch */ color: oklch(31.4% 0.161 268.2);

Tailwind

colors: {
  custom: {
    50: '#685ba7',
    500: '#131f81',
    950: '#000000',
  },
}

SCSS

$custom: #131f81;
$custom-light: #685ba7;
$custom-dark: #000000;

JSON

{
  "hex": "#131f81",
  "rgb": {
    "r": 19,
    "g": 31,
    "b": 129
  },
  "hsl": {
    "h": 233.455,
    "s": 74.324,
    "l": 29.02
  },
  "oklch": {
    "l": 0.31405,
    "c": 0.16122,
    "h": 268.2
  },
  "luminance": 0.02703
}

Semantic roles & 50–950 ramp

primary

#131F81

secondary

#B6A93A

accent

#DD37F1

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#070410

muted

#7A797F

Preview Lab

Preview with #131F81

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

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