#1B42AA#1B42AA

#1B42AA is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.3% C 0.173 H 264.4°. Best body text is #FFFFFF at 8.73:1 contrast (WCAG AA passes).

Color values

HEX	#1B42AA
RGB	rgb(27, 66, 170)
HSL	hsl(224, 73%, 39%)
HSV	hsv(224, 84%, 67%)
CMYK	cmyk(84.1%, 61.2%, 0%, 33.3%)
CIE-LAB	lab(31.88, 26.92, -59.33)
CIE-LCH	lch(31.88, 65.15, 294.40°)
OKLab	oklab(42.27% -0.0169 -0.1717)
OKLCH	oklch(42.27% 0.173 264.4)
XYZ	xyz(9.6533, 7.0305, 38.8707)
Luminance	0.0703 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B42AA #AA831B

analogous

#1B89AA #1B42AA #3B1BAA

triadic

#1B42AA #AA1B42 #42AA1B

tetradic

#1B42AA #AA1B89 #AA831B #1BAA3B

square

#1B42AA #AA1B89 #AA831B #1BAA3B

split-complementary

#1B42AA #AA3B1B #89AA1B

monochromatic

#0A1940 #132D75 #1B42AA #2658DC #5B80E5

Accessibility & contrast

On white

8.73

#1B42AA on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#1B42AA on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B42AA

8.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B42AA	#FFFFFF	#000000	##FFFFFF
##1B42AA	1.00	8.73	2.41	8.73
#FFFFFF	8.73	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AD

Deuteranopia (green-blind)

#0045A8

Tritanopia (blue-blind)

#005D6F

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #1b42aa;
/* rgb */ color: rgb(27, 66, 170);
/* oklch */ color: oklch(42.3% 0.173 264.4);

Tailwind

colors: {
  custom: {
    50: '#7275c4',
    500: '#1b42aa',
    950: '#000000',
  },
}

SCSS

$custom: #1b42aa;
$custom-light: #7275c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1b42aa",
  "rgb": {
    "r": 27,
    "g": 66,
    "b": 170
  },
  "hsl": {
    "h": 223.636,
    "s": 72.589,
    "l": 38.627
  },
  "oklch": {
    "l": 0.42272,
    "c": 0.17253,
    "h": 264.4
  },
  "luminance": 0.07032
}

Semantic roles & 50–950 ramp

primary

#1B42AA

secondary

#C9AA58

accent

#BD39EF

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090813

muted

#7B7B82

Preview Lab

Preview with #1B42AA

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

Preview Lab → · Contrast checker → · Palette generator →