#133D8F#133D8F

#133D8F is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.144 H 261.9°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#133D8F
RGB	rgb(19, 61, 143)
HSL	hsl(220, 77%, 32%)
HSV	hsv(220, 87%, 56%)
CMYK	cmyk(86.7%, 57.3%, 0%, 43.9%)
CIE-LAB	lab(28.00, 18.85, -49.27)
CIE-LCH	lch(28.00, 52.76, 290.93°)
OKLab	oklab(38.59% -0.0203 -0.1424)
OKLCH	oklch(38.59% 0.144 261.9)
XYZ	xyz(6.8934, 5.4582, 26.6715)
Luminance	0.0546 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#133D8F #8F6513

analogous

#137B8F #133D8F #27138F

triadic

#133D8F #8F133D #3D8F13

tetradic

#133D8F #8F137B #8F6513 #138F27

square

#133D8F #8F137B #8F6513 #138F27

split-complementary

#133D8F #8F2713 #7B8F13

monochromatic

#050F23 #0C2659 #133D8F #1A54C5 #3872E5

Accessibility & contrast

On white

10.04

#133D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#133D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #133D8F

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##133D8F	#FFFFFF	#000000	##FFFFFF
##133D8F	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004892

Deuteranopia (green-blind)

#003D8D

Tritanopia (blue-blind)

#005260

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #133d8f;
/* rgb */ color: rgb(19, 61, 143);
/* oklch */ color: oklch(38.6% 0.144 261.9);

Tailwind

colors: {
  custom: {
    50: '#6971b0',
    500: '#133d8f',
    950: '#000000',
  },
}

SCSS

$custom: #133d8f;
$custom-light: #6971b0;
$custom-dark: #000000;

JSON

{
  "hex": "#133d8f",
  "rgb": {
    "r": 19,
    "g": 61,
    "b": 143
  },
  "hsl": {
    "h": 219.677,
    "s": 76.543,
    "l": 31.765
  },
  "oklch": {
    "l": 0.38593,
    "c": 0.1438,
    "h": 261.9
  },
  "luminance": 0.05459
}

Semantic roles & 50–950 ramp

primary

#133D8F

secondary

#C3953B

accent

#B335F3

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080711

muted

#7A7A80

Preview Lab

Preview with #133D8F

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

Preview Lab → · Contrast checker → · Palette generator →