#1B428A#1B428A

#1B428A is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.5% C 0.128 H 261.3°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#1B428A
RGB	rgb(27, 66, 138)
HSL	hsl(219, 67%, 32%)
HSV	hsv(219, 80%, 54%)
CMYK	cmyk(80.4%, 52.2%, 0%, 45.9%)
CIE-LAB	lab(29.32, 14.10, -44.04)
CIE-LCH	lch(29.32, 46.24, 287.75°)
OKLab	oklab(39.54% -0.0193 -0.1268)
OKLCH	oklch(39.54% 0.128 261.3)
XYZ	xyz(6.9860, 5.9636, 24.8227)
Luminance	0.0596 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B428A #8A631B

analogous

#1B7A8A #1B428A #2C1B8A

triadic

#1B428A #8A1B42 #428A1B

tetradic

#1B428A #8A1B7A #8A631B #1B8A2C

square

#1B428A #8A1B7A #8A631B #1B8A2C

split-complementary

#1B428A #8A2C1B #7A8A1B

monochromatic

#071124 #112A57 #1B428A #255ABD #4579DB

Accessibility & contrast

On white

9.58

#1B428A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#1B428A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B428A

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B428A	#FFFFFF	#000000	##FFFFFF
##1B428A	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144A8D

Deuteranopia (green-blind)

#004089

Tritanopia (blue-blind)

#00535F

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b428a;
/* rgb */ color: rgb(27, 66, 138);
/* oklch */ color: oklch(39.5% 0.128 261.3);

Tailwind

colors: {
  custom: {
    50: '#6a75ad',
    500: '#1b428a',
    950: '#000000',
  },
}

SCSS

$custom: #1b428a;
$custom-light: #6a75ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b428a",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 138
  },
  "hsl": {
    "h": 218.919,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.39542,
    "c": 0.12823,
    "h": 261.3
  },
  "luminance": 0.05964
}

Semantic roles & 50–950 ramp

primary

#1B428A

secondary

#BC9245

accent

#AE3EEA

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1B428A

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

Preview Lab → · Contrast checker → · Palette generator →