#133B81#133B81

#133B81 is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.0% C 0.127 H 260.8°. Best body text is #FFFFFF at 10.66:1 contrast (WCAG AA passes).

Color values

HEX	#133B81
RGB	rgb(19, 59, 129)
HSL	hsl(218, 74%, 29%)
HSV	hsv(218, 85%, 51%)
CMYK	cmyk(85.3%, 54.3%, 0%, 49.4%)
CIE-LAB	lab(26.30, 14.43, -43.34)
CIE-LCH	lch(26.30, 45.67, 288.41°)
OKLab	oklab(36.95% -0.0203 -0.1249)
OKLCH	oklch(36.95% 0.127 260.8)
XYZ	xyz(5.7935, 4.8506, 21.3955)
Luminance	0.0485 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#133B81 #815913

analogous

#137281 #133B81 #221381

triadic

#133B81 #81133B #3B8113

tetradic

#133B81 #811372 #815913 #138122

square

#133B81 #811372 #815913 #138122

split-complementary

#133B81 #812213 #728113

monochromatic

#040C1B #0B234C #133B81 #1B53B6 #2E6FE0

Accessibility & contrast

On white

10.66

#133B81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#133B81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #133B81

10.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##133B81	#FFFFFF	#000000	##FFFFFF
##133B81	1.00	10.66	1.97	10.66
#FFFFFF	10.66	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#074383

Deuteranopia (green-blind)

#003A80

Tritanopia (blue-blind)

#004C58

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #133b81;
/* rgb */ color: rgb(19, 59, 129);
/* oklch */ color: oklch(37.0% 0.127 260.8);

Tailwind

colors: {
  custom: {
    50: '#6670a6',
    500: '#133b81',
    950: '#000000',
  },
}

SCSS

$custom: #133b81;
$custom-light: #6670a6;
$custom-dark: #000000;

JSON

{
  "hex": "#133b81",
  "rgb": {
    "r": 19,
    "g": 59,
    "b": 129
  },
  "hsl": {
    "h": 218.182,
    "s": 74.324,
    "l": 29.02
  },
  "oklch": {
    "l": 0.36954,
    "c": 0.12659,
    "h": 260.8
  },
  "luminance": 0.04851
}

Semantic roles & 50–950 ramp

primary

#133B81

secondary

#B6893A

accent

#AD37F1

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #133B81

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

Preview Lab → · Contrast checker → · Palette generator →