#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
RGB	rgb(19, 63, 138)
HSL	hsl(218, 76%, 31%)
HSV	hsv(218, 86%, 54%)
CMYK	cmyk(86.2%, 54.3%, 0%, 45.9%)
CIE-LAB	lab(28.19, 15.38, -45.88)
CIE-LCH	lch(28.19, 48.39, 288.53°)
OKLab	oklab(38.61% -0.0221 -0.1324)
OKLCH	oklch(38.61% 0.134 260.5)
XYZ	xyz(6.6318, 5.5276, 24.7572)
Luminance	0.0553 (WCAG relative)
Temperature	cool
Family	blue

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
##133F8A	1.00	9.97	2.11	9.97
#FFFFFF	9.97	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.97	1.00	21.00	1.00

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 →