#133A8F#133A8F

#133A8F is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.9% C 0.148 H 262.8°. Best body text is #FFFFFF at 10.35:1 contrast (WCAG AA passes).

Color values

HEX	#133A8F
RGB	rgb(19, 58, 143)
HSL	hsl(221, 77%, 32%)
HSV	hsv(221, 87%, 56%)
CMYK	cmyk(86.7%, 59.4%, 0%, 43.9%)
CIE-LAB	lab(27.15, 20.94, -50.66)
CIE-LCH	lch(27.15, 54.82, 292.46°)
OKLab	oklab(37.95% -0.0184 -0.1465)
OKLCH	oklch(37.95% 0.148 262.8)
XYZ	xyz(6.7378, 5.1469, 26.6196)
Luminance	0.0515 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#133A8F #8F6813

analogous

#13788F #133A8F #2A138F

triadic

#133A8F #8F133A #3A8F13

tetradic

#133A8F #8F1378 #8F6813 #138F2A

square

#133A8F #8F1378 #8F6813 #138F2A

split-complementary

#133A8F #8F2A13 #788F13

monochromatic

#050E23 #0C2459 #133A8F #1A50C5 #386EE5

Accessibility & contrast

On white

10.35

#133A8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#133A8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #133A8F

10.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##133A8F	#FFFFFF	#000000	##FFFFFF
##133A8F	1.00	10.35	2.03	10.35
#FFFFFF	10.35	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004692

Deuteranopia (green-blind)

#003B8D

Tritanopia (blue-blind)

#00505E

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #133a8f;
/* rgb */ color: rgb(19, 58, 143);
/* oklch */ color: oklch(37.9% 0.148 262.8);

Tailwind

colors: {
  custom: {
    50: '#6a6fb1',
    500: '#133a8f',
    950: '#000000',
  },
}

SCSS

$custom: #133a8f;
$custom-light: #6a6fb1;
$custom-dark: #000000;

JSON

{
  "hex": "#133a8f",
  "rgb": {
    "r": 19,
    "g": 58,
    "b": 143
  },
  "hsl": {
    "h": 221.129,
    "s": 76.543,
    "l": 31.765
  },
  "oklch": {
    "l": 0.37949,
    "c": 0.14766,
    "h": 262.8
  },
  "luminance": 0.05148
}

Semantic roles & 50–950 ramp

primary

#133A8F

secondary

#C3983B

accent

#B735F3

background

#F6F6FB

surface

#ECECF6

border

#C7C7D0

text

#080711

muted

#7A7A80

Preview Lab

Preview with #133A8F

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

Preview Lab → · Contrast checker → · Palette generator →