#133F8F#133F8F

#133F8F is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.0% C 0.141 H 261.2°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#133F8F
RGB	rgb(19, 63, 143)
HSL	hsl(219, 77%, 32%)
HSV	hsv(219, 87%, 56%)
CMYK	cmyk(86.7%, 55.9%, 0%, 43.9%)
CIE-LAB	lab(28.58, 17.45, -48.33)
CIE-LCH	lch(28.58, 51.39, 289.85°)
OKLab	oklab(39.03% -0.0216 -0.1396)
OKLCH	oklch(39.03% 0.141 261.2)
XYZ	xyz(7.0022, 5.6758, 26.7078)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#133F8F #8F6313

analogous

#137D8F #133F8F #25138F

triadic

#133F8F #8F133F #3F8F13

tetradic

#133F8F #8F137D #8F6313 #138F25

square

#133F8F #8F137D #8F6313 #138F25

split-complementary

#133F8F #8F2513 #7D8F13

monochromatic

#050F23 #0C2759 #133F8F #1A57C5 #3875E5

Accessibility & contrast

On white

9.83

#133F8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#133F8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #133F8F

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##133F8F	#FFFFFF	#000000	##FFFFFF
##133F8F	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#003E8D

Tritanopia (blue-blind)

#005360

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #133f8f;
/* rgb */ color: rgb(19, 63, 143);
/* oklch */ color: oklch(39.0% 0.141 261.2);

Tailwind

colors: {
  custom: {
    50: '#6973b0',
    500: '#133f8f',
    950: '#000000',
  },
}

SCSS

$custom: #133f8f;
$custom-light: #6973b0;
$custom-dark: #000000;

JSON

{
  "hex": "#133f8f",
  "rgb": {
    "r": 19,
    "g": 63,
    "b": 143
  },
  "hsl": {
    "h": 218.71,
    "s": 76.543,
    "l": 31.765
  },
  "oklch": {
    "l": 0.39029,
    "c": 0.14123,
    "h": 261.2
  },
  "luminance": 0.05677
}

Semantic roles & 50–950 ramp

primary

#133F8F

secondary

#C3933B

accent

#B035F3

background

#F6F6FA

surface

#ECECF5

border

#C7C7CF

text

#080811

muted

#7A7B80

Preview Lab

Preview with #133F8F

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

Preview Lab → · Contrast checker → · Palette generator →