#1B2B78#1B2B78

#1B2B78 is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.0% C 0.132 H 268.8°. Best body text is #FFFFFF at 12.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B78
RGB	rgb(27, 43, 120)
HSL	hsl(230, 63%, 29%)
HSV	hsv(230, 78%, 47%)
CMYK	cmyk(77.5%, 64.2%, 0%, 52.9%)
CIE-LAB	lab(21.27, 22.95, -45.83)
CIE-LCH	lch(21.27, 51.25, 296.60°)
OKLab	oklab(33.02% -0.0028 -0.1324)
OKLCH	oklch(33.02% 0.132 268.8)
XYZ	xyz(4.7049, 3.3163, 18.1578)
Luminance	0.0332 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B78 #78681B

analogous

#1B5A78 #1B2B78 #3A1B78

triadic

#1B2B78 #781B2B #2B781B

tetradic

#1B2B78 #781B5A #78681B #1B783A

square

#1B2B78 #781B5A #78681B #1B783A

split-complementary

#1B2B78 #783A1B #5A781B

monochromatic

#060919 #101946 #1B2B78 #263DAA #3B55D3

Accessibility & contrast

On white

12.62

#1B2B78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#1B2B78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B78

12.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B78	#FFFFFF	#000000	##FFFFFF
##1B2B78	1.00	12.62	1.66	12.62
#FFFFFF	12.62	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00387B

Deuteranopia (green-blind)

#002F77

Tritanopia (blue-blind)

#003F4D

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b2b78;
/* rgb */ color: rgb(27, 43, 120);
/* oklch */ color: oklch(33.0% 0.132 268.8);

Tailwind

colors: {
  custom: {
    50: '#6764a0',
    500: '#1b2b78',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b78;
$custom-light: #6764a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b78",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 120
  },
  "hsl": {
    "h": 229.677,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.33019,
    "c": 0.13245,
    "h": 268.8
  },
  "luminance": 0.03317
}

Semantic roles & 50–950 ramp

primary

#1B2B78

secondary

#AC9A43

accent

#CA41E6

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050F

muted

#7A797E

Preview Lab

Preview with #1B2B78

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

Preview Lab → · Contrast checker → · Palette generator →