#1B2B8A#1B2B8A

#1B2B8A is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.8% C 0.157 H 268.7°. Best body text is #FFFFFF at 11.94:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B8A
RGB	rgb(27, 43, 138)
HSL	hsl(231, 67%, 32%)
HSV	hsv(231, 80%, 54%)
CMYK	cmyk(80.4%, 68.8%, 0%, 45.9%)
CIE-LAB	lab(22.98, 29.97, -54.37)
CIE-LCH	lch(22.98, 62.08, 298.86°)
OKLab	oklab(34.8% -0.0036 -0.1574)
OKLCH	oklch(34.8% 0.157 268.7)
XYZ	xyz(5.9017, 3.7951, 24.4613)
Luminance	0.0380 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B8A #8A7A1B

analogous

#1B638A #1B2B8A #421B8A

triadic

#1B2B8A #8A1B2B #2B8A1B

tetradic

#1B2B8A #8A1B63 #8A7A1B #1B8A42

square

#1B2B8A #8A1B63 #8A7A1B #1B8A42

split-complementary

#1B2B8A #8A421B #638A1B

monochromatic

#070B24 #111B57 #1B2B8A #253BBD #455ADB

Accessibility & contrast

On white

11.94

#1B2B8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1B2B8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B8A

11.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B8A	#FFFFFF	#000000	##FFFFFF
##1B2B8A	1.00	11.94	1.76	11.94
#FFFFFF	11.94	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C8D

Deuteranopia (green-blind)

#003288

Tritanopia (blue-blind)

#004556

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1b2b8a;
/* rgb */ color: rgb(27, 43, 138);
/* oklch */ color: oklch(34.8% 0.157 268.7);

Tailwind

colors: {
  custom: {
    50: '#6c64ad',
    500: '#1b2b8a',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b8a;
$custom-light: #6c64ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b8a",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 138
  },
  "hsl": {
    "h": 231.351,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.34803,
    "c": 0.15746,
    "h": 268.7
  },
  "luminance": 0.03796
}

Semantic roles & 50–950 ramp

primary

#1B2B8A

secondary

#BCAB45

accent

#D13EEA

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080510

muted

#7B7A7F

Preview Lab

Preview with #1B2B8A

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

Preview Lab → · Contrast checker → · Palette generator →