#1B287A#1B287A

#1B287A is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.6% C 0.139 H 269.7°. Best body text is #FFFFFF at 12.87:1 contrast (WCAG AA passes).

Color values

HEX	#1B287A
RGB	rgb(27, 40, 122)
HSL	hsl(232, 64%, 29%)
HSV	hsv(232, 78%, 48%)
CMYK	cmyk(77.9%, 67.2%, 0%, 52.2%)
CIE-LAB	lab(20.66, 25.82, -48.11)
CIE-LCH	lch(20.66, 54.60, 298.22°)
OKLab	oklab(32.63% -0.0008 -0.1391)
OKLCH	oklch(32.63% 0.139 269.7)
XYZ	xyz(4.7224, 3.1552, 18.7687)
Luminance	0.0316 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B287A #7A6D1B

analogous

#1B587A #1B287A #3D1B7A

triadic

#1B287A #7A1B28 #287A1B

tetradic

#1B287A #7A1B58 #7A6D1B #1B7A3D

square

#1B287A #7A1B58 #7A6D1B #1B7A3D

split-complementary

#1B287A #7A3D1B #587A1B

monochromatic

#060819 #101848 #1B287A #2638AC #3C50D4

Accessibility & contrast

On white

12.87

#1B287A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1B287A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B287A

12.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B287A	#FFFFFF	#000000	##FFFFFF
##1B287A	1.00	12.87	1.63	12.87
#FFFFFF	12.87	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00367D

Deuteranopia (green-blind)

#002D78

Tritanopia (blue-blind)

#003E4D

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b287a;
/* rgb */ color: rgb(27, 40, 122);
/* oklch */ color: oklch(32.6% 0.139 269.7);

Tailwind

colors: {
  custom: {
    50: '#6862a1',
    500: '#1b287a',
    950: '#000000',
  },
}

SCSS

$custom: #1b287a;
$custom-light: #6862a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b287a",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 122
  },
  "hsl": {
    "h": 231.789,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.32625,
    "c": 0.13912,
    "h": 269.7
  },
  "luminance": 0.03156
}

Semantic roles & 50–950 ramp

primary

#1B287A

secondary

#AE9F43

accent

#D041E7

background

#F6F5FA

surface

#EBEAF3

border

#C6C6CD

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B287A

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

Preview Lab → · Contrast checker → · Palette generator →