#1B2A78#1B2A78

#1B2A78 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.8% C 0.134 H 269.1°. Best body text is #FFFFFF at 12.73:1 contrast (WCAG AA passes).

Color values

HEX	#1B2A78
RGB	rgb(27, 42, 120)
HSL	hsl(230, 63%, 29%)
HSV	hsv(230, 78%, 47%)
CMYK	cmyk(77.5%, 65%, 0%, 52.9%)
CIE-LAB	lab(21.00, 23.65, -46.27)
CIE-LCH	lch(21.00, 51.96, 297.07°)
OKLab	oklab(32.82% -0.0021 -0.1337)
OKLCH	oklch(32.82% 0.134 269.1)
XYZ	xyz(4.6690, 3.2445, 18.1458)
Luminance	0.0324 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2A78 #78691B

analogous

#1B5978 #1B2A78 #3B1B78

triadic

#1B2A78 #781B2A #2A781B

tetradic

#1B2A78 #781B59 #78691B #1B783B

square

#1B2A78 #781B59 #78691B #1B783B

split-complementary

#1B2A78 #783B1B #59781B

monochromatic

#060919 #101946 #1B2A78 #263BAA #3B53D3

Accessibility & contrast

On white

12.73

#1B2A78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#1B2A78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2A78

12.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2A78	#FFFFFF	#000000	##FFFFFF
##1B2A78	1.00	12.73	1.65	12.73
#FFFFFF	12.73	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377B

Deuteranopia (green-blind)

#002E77

Tritanopia (blue-blind)

#003E4C

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b2a78;
/* rgb */ color: rgb(27, 42, 120);
/* oklch */ color: oklch(32.8% 0.134 269.1);

Tailwind

colors: {
  custom: {
    50: '#6763a0',
    500: '#1b2a78',
    950: '#000000',
  },
}

SCSS

$custom: #1b2a78;
$custom-light: #6763a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2a78",
  "rgb": {
    "r": 27,
    "g": 42,
    "b": 120
  },
  "hsl": {
    "h": 230.323,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.32819,
    "c": 0.13375,
    "h": 269.1
  },
  "luminance": 0.03245
}

Semantic roles & 50–950 ramp

primary

#1B2A78

secondary

#AC9B43

accent

#CC41E6

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050F

muted

#7A797E

Preview Lab

Preview with #1B2A78

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

Preview Lab → · Contrast checker → · Palette generator →