#133A81#133A81

#133A81 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 36.7% C 0.128 H 261.2°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#133A81
RGB	rgb(19, 58, 129)
HSL	hsl(219, 74%, 29%)
HSV	hsv(219, 85%, 51%)
CMYK	cmyk(85.3%, 55%, 0%, 49.4%)
CIE-LAB	lab(26.01, 15.13, -43.82)
CIE-LCH	lch(26.01, 46.36, 289.05°)
OKLab	oklab(36.73% -0.0196 -0.1264)
OKLCH	oklch(36.73% 0.128 261.2)
XYZ	xyz(5.7426, 4.7488, 21.3786)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#133A81 #815A13

analogous

#137181 #133A81 #231381

triadic

#133A81 #81133A #3A8113

tetradic

#133A81 #811371 #815A13 #138123

square

#133A81 #811371 #815A13 #138123

split-complementary

#133A81 #812313 #718113

monochromatic

#040C1B #0B224C #133A81 #1B52B6 #2E6DE0

Accessibility & contrast

On white

10.77

#133A81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#133A81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #133A81

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##133A81	#FFFFFF	#000000	##FFFFFF
##133A81	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#024384

Deuteranopia (green-blind)

#003980

Tritanopia (blue-blind)

#004B57

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #133a81;
/* rgb */ color: rgb(19, 58, 129);
/* oklch */ color: oklch(36.7% 0.128 261.2);

Tailwind

colors: {
  custom: {
    50: '#666fa6',
    500: '#133a81',
    950: '#000000',
  },
}

SCSS

$custom: #133a81;
$custom-light: #666fa6;
$custom-dark: #000000;

JSON

{
  "hex": "#133a81",
  "rgb": {
    "r": 19,
    "g": 58,
    "b": 129
  },
  "hsl": {
    "h": 218.727,
    "s": 74.324,
    "l": 29.02
  },
  "oklch": {
    "l": 0.36727,
    "c": 0.12791,
    "h": 261.2
  },
  "luminance": 0.0475
}

Semantic roles & 50–950 ramp

primary

#133A81

secondary

#B68A3A

accent

#AF37F1

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #133A81

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

Preview Lab → · Contrast checker → · Palette generator →