#1B366A#1B366A

#1B366A is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.3% C 0.097 H 262.0°. Best body text is #FFFFFF at 11.78:1 contrast (WCAG AA passes).

Color values

HEX	#1B366A
RGB	rgb(27, 54, 106)
HSL	hsl(219, 59%, 26%)
HSV	hsv(219, 75%, 42%)
CMYK	cmyk(74.5%, 49.1%, 0%, 58.4%)
CIE-LAB	lab(23.38, 9.42, -33.43)
CIE-LCH	lch(23.38, 34.73, 285.74°)
OKLab	oklab(34.26% -0.0135 -0.0958)
OKLCH	oklch(34.26% 0.097 262)
XYZ	xyz(4.3718, 3.9115, 14.1575)
Luminance	0.0391 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B366A #6A4F1B

analogous

#1B5D6A #1B366A #281B6A

triadic

#1B366A #6A1B36 #366A1B

tetradic

#1B366A #6A1B5D #6A4F1B #1B6A28

square

#1B366A #6A1B5D #6A4F1B #1B6A28

split-complementary

#1B366A #6A281B #5D6A1B

monochromatic

#060C18 #0F1D39 #1B366A #274F9B #3468CB

Accessibility & contrast

On white

11.78

#1B366A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1B366A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B366A

11.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B366A	#FFFFFF	#000000	##FFFFFF
##1B366A	1.00	11.78	1.78	11.78
#FFFFFF	11.78	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B3C6C

Deuteranopia (green-blind)

#0A3469

Tritanopia (blue-blind)

#00424A

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b366a;
/* rgb */ color: rgb(27, 54, 106);
/* oklch */ color: oklch(34.3% 0.097 262.0);

Tailwind

colors: {
  custom: {
    50: '#636c95',
    500: '#1b366a',
    950: '#000000',
  },
}

SCSS

$custom: #1b366a;
$custom-light: #636c95;
$custom-dark: #000000;

JSON

{
  "hex": "#1b366a",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 106
  },
  "hsl": {
    "h": 219.494,
    "s": 59.398,
    "l": 26.078
  },
  "oklch": {
    "l": 0.34256,
    "c": 0.09674,
    "h": 262
  },
  "luminance": 0.03912
}

Semantic roles & 50–950 ramp

primary

#1B366A

secondary

#9F7F42

accent

#AD45E3

background

#F6F6F9

surface

#EBEBF1

border

#C6C6CB

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1B366A

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

Preview Lab → · Contrast checker → · Palette generator →