#1B1B9E#1B1B9E

#1B1B9E is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.7% C 0.198 H 269.7°. Best body text is #FFFFFF at 12.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B1B9E
RGB	rgb(27, 27, 158)
HSL	hsl(240, 71%, 36%)
HSV	hsv(240, 83%, 62%)
CMYK	cmyk(82.9%, 82.9%, 0%, 38%)
CIE-LAB	lab(21.89, 46.40, -68.53)
CIE-LCH	lch(21.89, 82.76, 304.10°)
OKLab	oklab(34.68% -0.001 -0.1984)
OKLCH	oklch(34.68% 0.198 269.7)
XYZ	xyz(7.0134, 3.4847, 32.6441)
Luminance	0.0348 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1B9E #9E9E1B

analogous

#1B5D9E #1B1B9E #5D1B9E

triadic

#1B1B9E #9E1B1B #1B9E1B

tetradic

#1B1B9E #9E1B5D #9E9E1B #1B9E5D

square

#1B1B9E #9E1B5D #9E9E1B #1B9E5D

split-complementary

#1B1B9E #9E5D1B #5D9E1B

monochromatic

#090935 #12126A #1B1B9E #2424D2 #5252E1

Accessibility & contrast

On white

12.37

#1B1B9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1B1B9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1B9E

12.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1B9E	#FFFFFF	#000000	##FFFFFF
##1B1B9E	1.00	12.37	1.70	12.37
#FFFFFF	12.37	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003BA2

Deuteranopia (green-blind)

#002D9C

Tritanopia (blue-blind)

#00455E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b1b9e;
/* rgb */ color: rgb(27, 27, 158);
/* oklch */ color: oklch(34.7% 0.198 269.7);

Tailwind

colors: {
  custom: {
    50: '#735bbc',
    500: '#1b1b9e',
    950: '#000000',
  },
}

SCSS

$custom: #1b1b9e;
$custom-light: #735bbc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1b9e",
  "rgb": {
    "r": 27,
    "g": 27,
    "b": 158
  },
  "hsl": {
    "h": 240,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.34683,
    "c": 0.19842,
    "h": 269.7
  },
  "luminance": 0.03485
}

Semantic roles & 50–950 ramp

primary

#1B1B9E

secondary

#C4C451

accent

#EE3AEE

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1B1B9E

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

Preview Lab → · Contrast checker → · Palette generator →