#1B338A#1B338A

#1B338A is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.3% C 0.148 H 266.7°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#1B338A
RGB	rgb(27, 51, 138)
HSL	hsl(227, 67%, 32%)
HSV	hsv(227, 80%, 54%)
CMYK	cmyk(80.4%, 63%, 0%, 45.9%)
CIE-LAB	lab(25.06, 24.53, -50.97)
CIE-LCH	lch(25.06, 56.56, 295.70°)
OKLab	oklab(36.33% -0.0084 -0.1474)
OKLCH	oklch(36.33% 0.148 266.7)
XYZ	xyz(6.2217, 4.4349, 24.5680)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B338A #8A721B

analogous

#1B6B8A #1B338A #3A1B8A

triadic

#1B338A #8A1B33 #338A1B

tetradic

#1B338A #8A1B6B #8A721B #1B8A3A

square

#1B338A #8A1B6B #8A721B #1B8A3A

split-complementary

#1B338A #8A3A1B #6B8A1B

monochromatic

#070D24 #112057 #1B338A #2546BD #4565DB

Accessibility & contrast

On white

11.13

#1B338A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#1B338A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B338A

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B338A	#FFFFFF	#000000	##FFFFFF
##1B338A	1.00	11.13	1.89	11.13
#FFFFFF	11.13	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00418D

Deuteranopia (green-blind)

#003688

Tritanopia (blue-blind)

#004959

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b338a;
/* rgb */ color: rgb(27, 51, 138);
/* oklch */ color: oklch(36.3% 0.148 266.7);

Tailwind

colors: {
  custom: {
    50: '#6b6aad',
    500: '#1b338a',
    950: '#000000',
  },
}

SCSS

$custom: #1b338a;
$custom-light: #6b6aad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b338a",
  "rgb": {
    "r": 27,
    "g": 51,
    "b": 138
  },
  "hsl": {
    "h": 227.027,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.36332,
    "c": 0.14762,
    "h": 266.7
  },
  "luminance": 0.04436
}

Semantic roles & 50–950 ramp

primary

#1B338A

secondary

#BCA245

accent

#C53EEA

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1B338A

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

Preview Lab → · Contrast checker → · Palette generator →