#133581#133581

#133581 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.6% C 0.134 H 263.1°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX	#133581
RGB	rgb(19, 53, 129)
HSL	hsl(221, 74%, 29%)
HSV	hsv(221, 85%, 51%)
CMYK	cmyk(85.3%, 58.9%, 0%, 49.4%)
CIE-LAB	lab(24.54, 18.68, -46.20)
CIE-LCH	lch(24.54, 49.83, 292.01°)
OKLab	oklab(35.62% -0.0161 -0.1335)
OKLCH	oklch(35.62% 0.134 263.1)
XYZ	xyz(5.5027, 4.2690, 21.2986)
Luminance	0.0427 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#133581 #815F13

analogous

#136C81 #133581 #281381

triadic

#133581 #811335 #358113

tetradic

#133581 #81136C #815F13 #138128

square

#133581 #81136C #815F13 #138128

split-complementary

#133581 #812813 #6C8113

monochromatic

#040B1B #0B1F4C #133581 #1B4BB6 #2E65E0

Accessibility & contrast

On white

11.33

#133581 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#133581 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #133581

11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##133581	#FFFFFF	#000000	##FFFFFF
##133581	1.00	11.33	1.85	11.33
#FFFFFF	11.33	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004084

Deuteranopia (green-blind)

#003580

Tritanopia (blue-blind)

#004855

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #133581;
/* rgb */ color: rgb(19, 53, 129);
/* oklch */ color: oklch(35.6% 0.134 263.1);

Tailwind

colors: {
  custom: {
    50: '#666ba6',
    500: '#133581',
    950: '#000000',
  },
}

SCSS

$custom: #133581;
$custom-light: #666ba6;
$custom-dark: #000000;

JSON

{
  "hex": "#133581",
  "rgb": {
    "r": 19,
    "g": 53,
    "b": 129
  },
  "hsl": {
    "h": 221.455,
    "s": 74.324,
    "l": 29.02
  },
  "oklch": {
    "l": 0.35618,
    "c": 0.13447,
    "h": 263.1
  },
  "luminance": 0.0427
}

Semantic roles & 50–950 ramp

primary

#133581

secondary

#B6903A

accent

#B737F1

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #133581

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

Preview Lab → · Contrast checker → · Palette generator →