#1D428B#1D428B

#1D428B is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.7% C 0.129 H 262.1°. Best body text is #FFFFFF at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#1D428B
RGB	rgb(29, 66, 139)
HSL	hsl(220, 65%, 33%)
HSV	hsv(220, 79%, 55%)
CMYK	cmyk(79.1%, 52.5%, 0%, 45.5%)
CIE-LAB	lab(29.47, 14.74, -44.42)
CIE-LCH	lch(29.47, 46.80, 288.36°)
OKLab	oklab(39.7% -0.0178 -0.1278)
OKLCH	oklch(39.7% 0.129 262.1)
XYZ	xyz(7.1134, 6.0209, 25.2083)
Luminance	0.0602 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D428B #8B661D

analogous

#1D798B #1D428B #2F1D8B

triadic

#1D428B #8B1D42 #428B1D

tetradic

#1D428B #8B1D79 #8B661D #1D8B2F

square

#1D428B #8B1D79 #8B661D #1D8B2F

split-complementary

#1D428B #8B2F1D #798B1D

monochromatic

#081226 #122A58 #1D428B #285ABE #497AD9

Accessibility & contrast

On white

9.53

#1D428B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1D428B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D428B

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D428B	#FFFFFF	#000000	##FFFFFF
##1D428B	1.00	9.53	2.20	9.53
#FFFFFF	9.53	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#134B8E

Deuteranopia (green-blind)

#00418A

Tritanopia (blue-blind)

#005460

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1d428b;
/* rgb */ color: rgb(29, 66, 139);
/* oklch */ color: oklch(39.7% 0.129 262.1);

Tailwind

colors: {
  custom: {
    50: '#6b75ad',
    500: '#1d428b',
    950: '#000000',
  },
}

SCSS

$custom: #1d428b;
$custom-light: #6b75ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1d428b",
  "rgb": {
    "r": 29,
    "g": 66,
    "b": 139
  },
  "hsl": {
    "h": 219.818,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.39696,
    "c": 0.12908,
    "h": 262.1
  },
  "luminance": 0.06022
}

Semantic roles & 50–950 ramp

primary

#1D428B

secondary

#BB9549

accent

#B03FE8

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1D428B

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

Preview Lab → · Contrast checker → · Palette generator →