#133B8F#133B8F

#133B8F is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.146 H 262.5°. Best body text is #FFFFFF at 10.24:1 contrast (WCAG AA passes).

Color values

HEX	#133B8F
RGB	rgb(19, 59, 143)
HSL	hsl(221, 77%, 32%)
HSV	hsv(221, 87%, 56%)
CMYK	cmyk(86.7%, 58.7%, 0%, 43.9%)
CIE-LAB	lab(27.43, 20.25, -50.20)
CIE-LCH	lch(27.43, 54.13, 291.96°)
OKLab	oklab(38.16% -0.019 -0.1451)
OKLCH	oklch(38.16% 0.146 262.5)
XYZ	xyz(6.7887, 5.2487, 26.6366)
Luminance	0.0525 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#133B8F #8F6713

analogous

#13798F #133B8F #29138F

triadic

#133B8F #8F133B #3B8F13

tetradic

#133B8F #8F1379 #8F6713 #138F29

square

#133B8F #8F1379 #8F6713 #138F29

split-complementary

#133B8F #8F2913 #798F13

monochromatic

#050E23 #0C2559 #133B8F #1A51C5 #3870E5

Accessibility & contrast

On white

10.24

#133B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#133B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #133B8F

10.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##133B8F	#FFFFFF	#000000	##FFFFFF
##133B8F	1.00	10.24	2.05	10.24
#FFFFFF	10.24	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004792

Deuteranopia (green-blind)

#003B8D

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #133b8f;
/* rgb */ color: rgb(19, 59, 143);
/* oklch */ color: oklch(38.2% 0.146 262.5);

Tailwind

colors: {
  custom: {
    50: '#6a70b1',
    500: '#133b8f',
    950: '#000000',
  },
}

SCSS

$custom: #133b8f;
$custom-light: #6a70b1;
$custom-dark: #000000;

JSON

{
  "hex": "#133b8f",
  "rgb": {
    "r": 19,
    "g": 59,
    "b": 143
  },
  "hsl": {
    "h": 220.645,
    "s": 76.543,
    "l": 31.765
  },
  "oklch": {
    "l": 0.38162,
    "c": 0.14638,
    "h": 262.5
  },
  "luminance": 0.0525
}

Semantic roles & 50–950 ramp

primary

#133B8F

secondary

#C3973B

accent

#B635F3

background

#F6F6FB

surface

#ECECF6

border

#C7C7D0

text

#080711

muted

#7A7A80

Preview Lab

Preview with #133B8F

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

Preview Lab → · Contrast checker → · Palette generator →