#1B1A9F#1B1A9F

#1B1A9F is a dark, highly saturated blue. Relative luminance 0.035; OKLCH L 34.7% C 0.200 H 269.7°. Best body text is #FFFFFF at 12.39:1 contrast (WCAG AA passes).

Color values

HEX	#1B1A9F
RGB	rgb(27, 26, 159)
HSL	hsl(240, 72%, 36%)
HSV	hsv(240, 84%, 62%)
CMYK	cmyk(83%, 83.6%, 0%, 37.6%)
CIE-LAB	lab(21.85, 47.20, -69.21)
CIE-LCH	lch(21.85, 83.77, 304.30°)
OKLab	oklab(34.69% -0.001 -0.2003)
OKLCH	oklch(34.69% 0.2 269.7)
XYZ	xyz(7.0773, 3.4742, 33.0917)
Luminance	0.0348 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1A9F #9E9F1A

analogous

#1A5C9F #1B1A9F #5E1A9F

triadic

#1B1A9F #9F1B1A #1A9F1B

tetradic

#1B1A9F #9F1A5C #9E9F1A #1A9F5E

square

#1B1A9F #9F1A5C #9E9F1A #1A9F5E

split-complementary

#1B1A9F #9F5E1A #5C9F1A

monochromatic

#090936 #12116A #1B1A9F #2423D4 #5251E3

Accessibility & contrast

On white

12.39

#1B1A9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1B1A9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1A9F

12.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1A9F	#FFFFFF	#000000	##FFFFFF
##1B1A9F	1.00	12.39	1.70	12.39
#FFFFFF	12.39	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003BA3

Deuteranopia (green-blind)

#002D9D

Tritanopia (blue-blind)

#00455E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b1a9f;
/* rgb */ color: rgb(27, 26, 159);
/* oklch */ color: oklch(34.7% 0.200 269.7);

Tailwind

colors: {
  custom: {
    50: '#735bbd',
    500: '#1b1a9f',
    950: '#000000',
  },
}

SCSS

$custom: #1b1a9f;
$custom-light: #735bbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1a9f",
  "rgb": {
    "r": 27,
    "g": 26,
    "b": 159
  },
  "hsl": {
    "h": 240.451,
    "s": 71.892,
    "l": 36.275
  },
  "oklch": {
    "l": 0.34692,
    "c": 0.20035,
    "h": 269.7
  },
  "luminance": 0.03475
}

Semantic roles & 50–950 ramp

primary

#1B1A9F

secondary

#C4C550

accent

#EF39ED

background

#F7F5FB

surface

#EEE9F7

border

#C9C5D0

text

#0A0412

muted

#7C7981

Preview Lab

Preview with #1B1A9F

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

Preview Lab → · Contrast checker → · Palette generator →