#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
RGBrgb(19, 63, 129)
HSLhsl(216, 74%, 29%)
HSVhsv(216, 85%, 51%)
CMYKcmyk(85.3%, 51.2%, 0%, 49.4%)
CIE-LABlab(27.51, 11.61, -41.38)
CIE-LCHlch(27.51, 42.98, 285.68°)
OKLaboklab(37.88% -0.0234 -0.1191)
OKLCHoklch(37.88% 0.121 258.9)
XYZxyz(6.0071, 5.2777, 21.4667)
Luminance0.0528 (WCAG relative)
Temperaturecool
Familyblue

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
##133F811.0010.222.0610.22
#FFFFFF10.221.0021.001.00
#0000002.0621.001.0021.00
##FFFFFF10.221.0021.001.00

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.

Preview Lab → · Contrast checker → · Palette generator →

#133F81 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva