#1B428C#1B428C

#1B428C is a dark, vivid blue. Relative luminance 0.060; OKLCH L 39.7% C 0.131 H 261.6°. Best body text is #FFFFFF at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#1B428C
RGB	rgb(27, 66, 140)
HSL	hsl(219, 68%, 33%)
HSV	hsv(219, 81%, 55%)
CMYK	cmyk(80.7%, 52.9%, 0%, 45.1%)
CIE-LAB	lab(29.47, 14.91, -45.03)
CIE-LCH	lch(29.47, 47.44, 288.32°)
OKLab	oklab(39.7% -0.0191 -0.1297)
OKLCH	oklch(39.7% 0.131 261.6)
XYZ	xyz(7.1321, 6.0221, 25.5923)
Luminance	0.0602 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B428C #8C651B

analogous

#1B7A8C #1B428C #2C1B8C

triadic

#1B428C #8C1B42 #428C1B

tetradic

#1B428C #8C1B7A #8C651B #1B8C2C

square

#1B428C #8C1B7A #8C651B #1B8C2C

split-complementary

#1B428C #8C2C1B #7A8C1B

monochromatic

#071225 #112A59 #1B428C #255ABF #467ADB

Accessibility & contrast

On white

9.53

#1B428C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1B428C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B428C

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B428C	#FFFFFF	#000000	##FFFFFF
##1B428C	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)

#104B8F

Deuteranopia (green-blind)

#00418B

Tritanopia (blue-blind)

#005460

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1b428c;
/* rgb */ color: rgb(27, 66, 140);
/* oklch */ color: oklch(39.7% 0.131 261.6);

Tailwind

colors: {
  custom: {
    50: '#6a75ae',
    500: '#1b428c',
    950: '#000000',
  },
}

SCSS

$custom: #1b428c;
$custom-light: #6a75ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b428c",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 140
  },
  "hsl": {
    "h": 219.292,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.39701,
    "c": 0.13108,
    "h": 261.6
  },
  "luminance": 0.06023
}

Semantic roles & 50–950 ramp

primary

#1B428C

secondary

#BD9446

accent

#AF3DEB

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1B428C

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

Preview Lab → · Contrast checker → · Palette generator →