#133F8A#133F8A

#133F8A is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.134 H 260.5°. Best body text is #FFFFFF at 9.97:1 contrast (WCAG AA passes).

Color values

HEX#133F8A
RGBrgb(19, 63, 138)
HSLhsl(218, 76%, 31%)
HSVhsv(218, 86%, 54%)
CMYKcmyk(86.2%, 54.3%, 0%, 45.9%)
CIE-LABlab(28.19, 15.38, -45.88)
CIE-LCHlch(28.19, 48.39, 288.53°)
OKLaboklab(38.61% -0.0221 -0.1324)
OKLCHoklch(38.61% 0.134 260.5)
XYZxyz(6.6318, 5.5276, 24.7572)
Luminance0.0553 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#133F8A #8A5E13
analogous
#137A8A #133F8A #22138A
triadic
#133F8A #8A133F #3F8A13
tetradic
#133F8A #8A137A #8A5E13 #138A22
square
#133F8A #8A137A #8A5E13 #138A22
split-complementary
#133F8A #8A2213 #7A8A13
monochromatic
#040E1E #0C2654 #133F8A #1A58C0 #3475E3

Accessibility & contrast

On white

9.97
#133F8A on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.11
#133F8A on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #133F8A
9.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##133F8A#FFFFFF#000000##FFFFFF
##133F8A1.009.972.119.97
#FFFFFF9.971.0021.001.00
#0000002.1121.001.0021.00
##FFFFFF9.971.0021.001.00

Color blindness preview

Protanopia (red-blind)
#04488D
Deuteranopia (green-blind)
#003D89
Tritanopia (blue-blind)
#00515E
Achromatopsia (no color)
#424242

Design tokens & code

CSS
--color: #133f8a;
/* rgb */ color: rgb(19, 63, 138);
/* oklch */ color: oklch(38.6% 0.134 260.5);
Tailwind
colors: {
  custom: {
    50: '#6873ad',
    500: '#133f8a',
    950: '#000000',
  },
}
SCSS
$custom: #133f8a;
$custom-light: #6873ad;
$custom-dark: #000000;
JSON
{
  "hex": "#133f8a",
  "rgb": {
    "r": 19,
    "g": 63,
    "b": 138
  },
  "hsl": {
    "h": 217.815,
    "s": 75.796,
    "l": 30.784
  },
  "oklch": {
    "l": 0.38609,
    "c": 0.13421,
    "h": 260.5
  },
  "luminance": 0.05528
}

Semantic roles & 50–950 ramp

primary
#133F8A
secondary
#BE8E3A
accent
#AD35F2
background
#F6F6FA
surface
#ECECF4
border
#C7C7CE
text
#070810
muted
#7A7B7F

Preview Lab

Preview with #133F8A

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

Preview Lab → · Contrast checker → · Palette generator →

#133F8A Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva