#1D428A#1D428A

#1D428A is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.6% C 0.128 H 261.9°. Best body text is #FFFFFF at 9.55:1 contrast (WCAG AA passes).

Color values

HEX	#1D428A
RGB	rgb(29, 66, 138)
HSL	hsl(220, 65%, 33%)
HSV	hsv(220, 79%, 54%)
CMYK	cmyk(79%, 52.2%, 0%, 45.9%)
CIE-LAB	lab(29.39, 14.33, -43.92)
CIE-LCH	lch(29.39, 46.20, 288.08°)
OKLab	oklab(39.62% -0.0179 -0.1264)
OKLCH	oklch(39.62% 0.128 261.9)
XYZ	xyz(7.0407, 5.9918, 24.8253)
Luminance	0.0599 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D428A #8A651D

analogous

#1D788A #1D428A #2F1D8A

triadic

#1D428A #8A1D42 #428A1D

tetradic

#1D428A #8A1D78 #8A651D #1D8A2F

square

#1D428A #8A1D78 #8A651D #1D8A2F

split-complementary

#1D428A #8A2F1D #788A1D

monochromatic

#081225 #122A57 #1D428A #285ABD #497AD9

Accessibility & contrast

On white

9.55

#1D428A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1D428A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D428A

9.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D428A	#FFFFFF	#000000	##FFFFFF
##1D428A	1.00	9.55	2.20	9.55
#FFFFFF	9.55	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#144B8D

Deuteranopia (green-blind)

#004189

Tritanopia (blue-blind)

#00535F

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1d428a;
/* rgb */ color: rgb(29, 66, 138);
/* oklch */ color: oklch(39.6% 0.128 261.9);

Tailwind

colors: {
  custom: {
    50: '#6b75ad',
    500: '#1d428a',
    950: '#000000',
  },
}

SCSS

$custom: #1d428a;
$custom-light: #6b75ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d428a",
  "rgb": {
    "r": 29,
    "g": 66,
    "b": 138
  },
  "hsl": {
    "h": 219.633,
    "s": 65.269,
    "l": 32.745
  },
  "oklch": {
    "l": 0.39616,
    "c": 0.12764,
    "h": 261.9
  },
  "luminance": 0.05993
}

Semantic roles & 50–950 ramp

primary

#1D428A

secondary

#BB9448

accent

#AF40E8

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1D428A

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

Preview Lab → · Contrast checker → · Palette generator →