#1B2C78#1B2C78

#1B2C78 is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.2% C 0.131 H 268.5°. Best body text is #FFFFFF at 12.51:1 contrast (WCAG AA passes).

Color values

HEX	#1B2C78
RGB	rgb(27, 44, 120)
HSL	hsl(229, 63%, 29%)
HSV	hsv(229, 78%, 47%)
CMYK	cmyk(77.5%, 63.3%, 0%, 52.9%)
CIE-LAB	lab(21.54, 22.24, -45.38)
CIE-LCH	lch(21.54, 50.54, 296.11°)
OKLab	oklab(33.22% -0.0035 -0.1311)
OKLCH	oklch(33.22% 0.131 268.5)
XYZ	xyz(4.7417, 3.3899, 18.1701)
Luminance	0.0339 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2C78 #78671B

analogous

#1B5B78 #1B2C78 #391B78

triadic

#1B2C78 #781B2C #2C781B

tetradic

#1B2C78 #781B5B #78671B #1B7839

square

#1B2C78 #781B5B #78671B #1B7839

split-complementary

#1B2C78 #78391B #5B781B

monochromatic

#060919 #101A46 #1B2C78 #263EAA #3B56D3

Accessibility & contrast

On white

12.51

#1B2C78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1B2C78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2C78

12.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2C78	#FFFFFF	#000000	##FFFFFF
##1B2C78	1.00	12.51	1.68	12.51
#FFFFFF	12.51	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00387A

Deuteranopia (green-blind)

#002F77

Tritanopia (blue-blind)

#003F4D

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b2c78;
/* rgb */ color: rgb(27, 44, 120);
/* oklch */ color: oklch(33.2% 0.131 268.5);

Tailwind

colors: {
  custom: {
    50: '#6764a0',
    500: '#1b2c78',
    950: '#000000',
  },
}

SCSS

$custom: #1b2c78;
$custom-light: #6764a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2c78",
  "rgb": {
    "r": 27,
    "g": 44,
    "b": 120
  },
  "hsl": {
    "h": 229.032,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.33222,
    "c": 0.13115,
    "h": 268.5
  },
  "luminance": 0.0339
}

Semantic roles & 50–950 ramp

primary

#1B2C78

secondary

#AC9943

accent

#C841E6

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07050F

muted

#7A7A7E

Preview Lab

Preview with #1B2C78

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

Preview Lab → · Contrast checker → · Palette generator →