#133F81#133F81

#133F81 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 37.9% C 0.121 H 258.9°. Best body text is #FFFFFF at 10.22:1 contrast (WCAG AA passes).

Color values

HEX	#133F81
RGB	rgb(19, 63, 129)
HSL	hsl(216, 74%, 29%)
HSV	hsv(216, 85%, 51%)
CMYK	cmyk(85.3%, 51.2%, 0%, 49.4%)
CIE-LAB	lab(27.51, 11.61, -41.38)
CIE-LCH	lch(27.51, 42.98, 285.68°)
OKLab	oklab(37.88% -0.0234 -0.1191)
OKLCH	oklch(37.88% 0.121 258.9)
XYZ	xyz(6.0071, 5.2777, 21.4667)
Luminance	0.0528 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#133F81 #815513

analogous

#137681 #133F81 #1E1381

triadic

#133F81 #81133F #3F8113

tetradic

#133F81 #811376 #815513 #13811E

square

#133F81 #811376 #815513 #13811E

split-complementary

#133F81 #811E13 #768113

monochromatic

#040D1B #0B254C #133F81 #1B59B6 #2E75E0

Accessibility & contrast

On white

10.22

#133F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#133F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #133F81

10.22:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##133F81	#FFFFFF	#000000	##FFFFFF
##133F81	1.00	10.22	2.06	10.22
#FFFFFF	10.22	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.22	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#174683

Deuteranopia (green-blind)

#003C80

Tritanopia (blue-blind)

#004F5A

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #133f81;
/* rgb */ color: rgb(19, 63, 129);
/* oklch */ color: oklch(37.9% 0.121 258.9);

Tailwind

colors: {
  custom: {
    50: '#6573a6',
    500: '#133f81',
    950: '#000000',
  },
}

SCSS

$custom: #133f81;
$custom-light: #6573a6;
$custom-dark: #000000;

JSON

{
  "hex": "#133f81",
  "rgb": {
    "r": 19,
    "g": 63,
    "b": 129
  },
  "hsl": {
    "h": 216,
    "s": 74.324,
    "l": 29.02
  },
  "oklch": {
    "l": 0.37877,
    "c": 0.12139,
    "h": 258.9
  },
  "luminance": 0.05278
}

Semantic roles & 50–950 ramp

primary

#133F81

secondary

#B6843A

accent

#A737F1

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #133F81

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

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