#1B2B84#1B2B84

#1B2B84 is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.2% C 0.149 H 268.8°. Best body text is #FFFFFF at 12.17:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B84
RGB	rgb(27, 43, 132)
HSL	hsl(231, 66%, 31%)
HSV	hsv(231, 80%, 52%)
CMYK	cmyk(79.5%, 67.4%, 0%, 48.2%)
CIE-LAB	lab(22.39, 27.66, -51.58)
CIE-LCH	lch(22.39, 58.53, 298.20°)
OKLab	oklab(34.2% -0.0032 -0.1493)
OKLCH	oklch(34.2% 0.149 268.8)
XYZ	xyz(5.4793, 3.6261, 22.2365)
Luminance	0.0363 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B84 #84741B

analogous

#1B5F84 #1B2B84 #3F1B84

triadic

#1B2B84 #841B2B #2B841B

tetradic

#1B2B84 #841B5F #84741B #1B843F

square

#1B2B84 #841B5F #84741B #1B843F

split-complementary

#1B2B84 #843F1B #5F841B

monochromatic

#060A1E #111A51 #1B2B84 #253CB7 #4158D8

Accessibility & contrast

On white

12.17

#1B2B84 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1B2B84 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B84

12.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B84	#FFFFFF	#000000	##FFFFFF
##1B2B84	1.00	12.17	1.73	12.17
#FFFFFF	12.17	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B87

Deuteranopia (green-blind)

#003182

Tritanopia (blue-blind)

#004353

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b2b84;
/* rgb */ color: rgb(27, 43, 132);
/* oklch */ color: oklch(34.2% 0.149 268.8);

Tailwind

colors: {
  custom: {
    50: '#6a64a9',
    500: '#1b2b84',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b84;
$custom-light: #6a64a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b84",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 132
  },
  "hsl": {
    "h": 230.857,
    "s": 66.038,
    "l": 31.176
  },
  "oklch": {
    "l": 0.34195,
    "c": 0.1493,
    "h": 268.8
  },
  "luminance": 0.03627
}

Semantic roles & 50–950 ramp

primary

#1B2B84

secondary

#B7A643

accent

#CF3FE9

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080510

muted

#7A7A7F

Preview Lab

Preview with #1B2B84

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

Preview Lab → · Contrast checker → · Palette generator →