#1B428D#1B428D

#1B428D is a dark, vivid blue. Relative luminance 0.061; OKLCH L 39.8% C 0.133 H 261.8°. Best body text is #FFFFFF at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#1B428D
RGB	rgb(27, 66, 141)
HSL	hsl(219, 68%, 33%)
HSV	hsv(219, 81%, 55%)
CMYK	cmyk(80.9%, 53.2%, 0%, 44.7%)
CIE-LAB	lab(29.54, 15.32, -45.53)
CIE-LCH	lch(29.54, 48.04, 288.59°)
OKLab	oklab(39.78% -0.0189 -0.1311)
OKLCH	oklch(39.78% 0.133 261.8)
XYZ	xyz(7.2062, 6.0517, 25.9824)
Luminance	0.0605 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B428D #8D661B

analogous

#1B7B8D #1B428D #2D1B8D

triadic

#1B428D #8D1B42 #428D1B

tetradic

#1B428D #8D1B7B #8D661B #1B8D2D

square

#1B428D #8D1B7B #8D661B #1B8D2D

split-complementary

#1B428D #8D2D1B #7B8D1B

monochromatic

#071226 #112A5A #1B428D #255AC0 #477ADC

Accessibility & contrast

On white

9.50

#1B428D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1B428D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B428D

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B428D	#FFFFFF	#000000	##FFFFFF
##1B428D	1.00	9.50	2.21	9.50
#FFFFFF	9.50	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E4B90

Deuteranopia (green-blind)

#00418C

Tritanopia (blue-blind)

#005461

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b428d;
/* rgb */ color: rgb(27, 66, 141);
/* oklch */ color: oklch(39.8% 0.133 261.8);

Tailwind

colors: {
  custom: {
    50: '#6b75af',
    500: '#1b428d',
    950: '#000000',
  },
}

SCSS

$custom: #1b428d;
$custom-light: #6b75af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b428d",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 141
  },
  "hsl": {
    "h": 219.474,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.39782,
    "c": 0.13251,
    "h": 261.8
  },
  "luminance": 0.06053
}

Semantic roles & 50–950 ramp

primary

#1B428D

secondary

#BD9546

accent

#AF3DEB

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1B428D

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

Preview Lab → · Contrast checker → · Palette generator →