#1D428F#1D428F

#1D428F is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.0% C 0.135 H 262.6°. Best body text is #FFFFFF at 9.42:1 contrast (WCAG AA passes).

Color values

HEX	#1D428F
RGB	rgb(29, 66, 143)
HSL	hsl(221, 66%, 34%)
HSV	hsv(221, 80%, 56%)
CMYK	cmyk(79.7%, 53.8%, 0%, 43.9%)
CIE-LAB	lab(29.76, 16.35, -46.40)
CIE-LCH	lch(29.76, 49.20, 289.42°)
OKLab	oklab(40.02% -0.0173 -0.1337)
OKLCH	oklch(40.02% 0.135 262.6)
XYZ	xyz(7.4111, 6.1400, 26.7758)
Luminance	0.0614 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D428F #8F6A1D

analogous

#1D7B8F #1D428F #311D8F

triadic

#1D428F #8F1D42 #428F1D

tetradic

#1D428F #8F1D7B #8F6A1D #1D8F31

square

#1D428F #8F1D7B #8F6A1D #1D8F31

split-complementary

#1D428F #8F311D #7B8F1D

monochromatic

#081329 #132B5C #1D428F #2759C2 #4C7ADB

Accessibility & contrast

On white

9.42

#1D428F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.23

#1D428F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D428F

9.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D428F	#FFFFFF	#000000	##FFFFFF
##1D428F	1.00	9.42	2.23	9.42
#FFFFFF	9.42	1.00	21.00	1.00
#000000	2.23	21.00	1.00	21.00
##FFFFFF	9.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A4C92

Deuteranopia (green-blind)

#00418D

Tritanopia (blue-blind)

#005562

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1d428f;
/* rgb */ color: rgb(29, 66, 143);
/* oklch */ color: oklch(40.0% 0.135 262.6);

Tailwind

colors: {
  custom: {
    50: '#6c75b0',
    500: '#1d428f',
    950: '#000000',
  },
}

SCSS

$custom: #1d428f;
$custom-light: #6c75b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1d428f",
  "rgb": {
    "r": 29,
    "g": 66,
    "b": 143
  },
  "hsl": {
    "h": 220.526,
    "s": 66.279,
    "l": 33.725
  },
  "oklch": {
    "l": 0.40017,
    "c": 0.13479,
    "h": 262.6
  },
  "luminance": 0.06141
}

Semantic roles & 50–950 ramp

primary

#1D428F

secondary

#BD984B

accent

#B23FE9

background

#F7F7FA

surface

#EDEDF5

border

#C8C8CF

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1D428F

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

Preview Lab → · Contrast checker → · Palette generator →