#1B2C79#1B2C79

#1B2C79 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.3% C 0.133 H 268.5°. Best body text is #FFFFFF at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#1B2C79
RGB	rgb(27, 44, 121)
HSL	hsl(229, 64%, 29%)
HSV	hsv(229, 78%, 47%)
CMYK	cmyk(77.7%, 63.6%, 0%, 52.5%)
CIE-LAB	lab(21.63, 22.64, -45.87)
CIE-LCH	lch(21.63, 51.16, 296.27°)
OKLab	oklab(33.32% -0.0035 -0.1325)
OKLCH	oklch(33.32% 0.133 268.5)
XYZ	xyz(4.8027, 3.4143, 18.4914)
Luminance	0.0341 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2C79 #79681B

analogous

#1B5B79 #1B2C79 #391B79

triadic

#1B2C79 #791B2C #2C791B

tetradic

#1B2C79 #791B5B #79681B #1B7939

square

#1B2C79 #791B5B #79681B #1B7939

split-complementary

#1B2C79 #79391B #5B791B

monochromatic

#060919 #101A47 #1B2C79 #263EAB #3B57D3

Accessibility & contrast

On white

12.48

#1B2C79 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1B2C79 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2C79

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2C79	#FFFFFF	#000000	##FFFFFF
##1B2C79	1.00	12.48	1.68	12.48
#FFFFFF	12.48	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00387C

Deuteranopia (green-blind)

#003078

Tritanopia (blue-blind)

#00404E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b2c79;
/* rgb */ color: rgb(27, 44, 121);
/* oklch */ color: oklch(33.3% 0.133 268.5);

Tailwind

colors: {
  custom: {
    50: '#6764a0',
    500: '#1b2c79',
    950: '#000000',
  },
}

SCSS

$custom: #1b2c79;
$custom-light: #6764a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2c79",
  "rgb": {
    "r": 27,
    "g": 44,
    "b": 121
  },
  "hsl": {
    "h": 229.149,
    "s": 63.514,
    "l": 29.02
  },
  "oklch": {
    "l": 0.33316,
    "c": 0.13258,
    "h": 268.5
  },
  "luminance": 0.03415
}

Semantic roles & 50–950 ramp

primary

#1B2C79

secondary

#AD9A43

accent

#C941E7

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #1B2C79

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

Preview Lab → · Contrast checker → · Palette generator →