#1B3793#1B3793

#1B3793 is a dark, vivid blue. Relative luminance 0.051; OKLCH L 38.0% C 0.155 H 266.0°. Best body text is #FFFFFF at 10.42:1 contrast (WCAG AA passes).

Color values

HEX	#1B3793
RGB	rgb(27, 55, 147)
HSL	hsl(226, 69%, 34%)
HSV	hsv(226, 82%, 58%)
CMYK	cmyk(81.6%, 62.6%, 0%, 42.4%)
CIE-LAB	lab(26.94, 25.34, -53.46)
CIE-LCH	lch(26.94, 59.16, 295.36°)
OKLab	oklab(37.97% -0.0109 -0.1546)
OKLCH	oklch(37.97% 0.155 266)
XYZ	xyz(7.0828, 5.0711, 28.2036)
Luminance	0.0507 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3793 #93771B

analogous

#1B7393 #1B3793 #3B1B93

triadic

#1B3793 #931B37 #37931B

tetradic

#1B3793 #931B73 #93771B #1B933B

square

#1B3793 #931B73 #93771B #1B933B

split-complementary

#1B3793 #933B1B #73931B

monochromatic

#08102C #12245F #1B3793 #244AC7 #4B6DDE

Accessibility & contrast

On white

10.42

#1B3793 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1B3793 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3793

10.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3793	#FFFFFF	#000000	##FFFFFF
##1B3793	1.00	10.42	2.01	10.42
#FFFFFF	10.42	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004596

Deuteranopia (green-blind)

#003A91

Tritanopia (blue-blind)

#004F5F

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b3793;
/* rgb */ color: rgb(27, 55, 147);
/* oklch */ color: oklch(38.0% 0.155 266.0);

Tailwind

colors: {
  custom: {
    50: '#6d6db4',
    500: '#1b3793',
    950: '#000000',
  },
}

SCSS

$custom: #1b3793;
$custom-light: #6d6db4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3793",
  "rgb": {
    "r": 27,
    "g": 55,
    "b": 147
  },
  "hsl": {
    "h": 226,
    "s": 68.966,
    "l": 34.118
  },
  "oklch": {
    "l": 0.37973,
    "c": 0.15502,
    "h": 266
  },
  "luminance": 0.05072
}

Semantic roles & 50–950 ramp

primary

#1B3793

secondary

#C0A44A

accent

#C33CEC

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080711

muted

#7B7A80

Preview Lab

Preview with #1B3793

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

Preview Lab → · Contrast checker → · Palette generator →