#1B428E#1B428E

#1B428E is a dark, vivid blue. Relative luminance 0.061; OKLCH L 39.9% C 0.134 H 261.9°. Best body text is #FFFFFF at 9.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B428E
RGB	rgb(27, 66, 142)
HSL	hsl(220, 68%, 33%)
HSV	hsv(220, 81%, 56%)
CMYK	cmyk(81%, 53.5%, 0%, 44.3%)
CIE-LAB	lab(29.62, 15.72, -46.02)
CIE-LCH	lch(29.62, 48.64, 288.86°)
OKLab	oklab(39.86% -0.0188 -0.1326)
OKLCH	oklch(39.86% 0.134 261.9)
XYZ	xyz(7.2809, 6.0816, 26.3761)
Luminance	0.0608 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B428E #8E671B

analogous

#1B7B8E #1B428E #2D1B8E

triadic

#1B428E #8E1B42 #428E1B

tetradic

#1B428E #8E1B7B #8E671B #1B8E2D

square

#1B428E #8E1B7B #8E671B #1B8E2D

split-complementary

#1B428E #8E2D1B #7B8E1B

monochromatic

#071227 #112A5B #1B428E #255AC1 #477ADC

Accessibility & contrast

On white

9.47

#1B428E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1B428E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B428E

9.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B428E	#FFFFFF	#000000	##FFFFFF
##1B428E	1.00	9.47	2.22	9.47
#FFFFFF	9.47	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0C4B91

Deuteranopia (green-blind)

#00418C

Tritanopia (blue-blind)

#005561

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1b428e;
/* rgb */ color: rgb(27, 66, 142);
/* oklch */ color: oklch(39.9% 0.134 261.9);

Tailwind

colors: {
  custom: {
    50: '#6b75b0',
    500: '#1b428e',
    950: '#000000',
  },
}

SCSS

$custom: #1b428e;
$custom-light: #6b75b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b428e",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 142
  },
  "hsl": {
    "h": 219.652,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.39863,
    "c": 0.13393,
    "h": 261.9
  },
  "luminance": 0.06082
}

Semantic roles & 50–950 ramp

primary

#1B428E

secondary

#BE9547

accent

#B03DEB

background

#F6F7FA

surface

#ECEDF5

border

#C7C8CF

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1B428E

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

Preview Lab → · Contrast checker → · Palette generator →