#1B2B73#1B2B73

#1B2B73 is a dark, vivid blue. Relative luminance 0.032; OKLCH L 32.5% C 0.125 H 268.7°. Best body text is #FFFFFF at 12.81:1 contrast (WCAG AA passes).

Color values

HEX	#1B2B73
RGB	rgb(27, 43, 115)
HSL	hsl(229, 62%, 28%)
HSV	hsv(229, 77%, 45%)
CMYK	cmyk(76.5%, 62.6%, 0%, 54.9%)
CIE-LAB	lab(20.82, 20.95, -43.36)
CIE-LCH	lch(20.82, 48.16, 295.79°)
OKLab	oklab(32.55% -0.0028 -0.1252)
OKLCH	oklch(32.55% 0.125 268.7)
XYZ	xyz(4.4093, 3.1981, 16.6012)
Luminance	0.0320 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2B73 #73631B

analogous

#1B5773 #1B2B73 #371B73

triadic

#1B2B73 #731B2B #2B731B

tetradic

#1B2B73 #731B57 #73631B #1B7337

square

#1B2B73 #731B57 #73631B #1B7337

split-complementary

#1B2B73 #73371B #57731B

monochromatic

#060919 #0F1841 #1B2B73 #273EA5 #3854D0

Accessibility & contrast

On white

12.81

#1B2B73 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.64

#1B2B73 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2B73

12.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2B73	#FFFFFF	#000000	##FFFFFF
##1B2B73	1.00	12.81	1.64	12.81
#FFFFFF	12.81	1.00	21.00	1.00
#000000	1.64	21.00	1.00	21.00
##FFFFFF	12.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003675

Deuteranopia (green-blind)

#002E72

Tritanopia (blue-blind)

#003D4A

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b2b73;
/* rgb */ color: rgb(27, 43, 115);
/* oklch */ color: oklch(32.5% 0.125 268.7);

Tailwind

colors: {
  custom: {
    50: '#66649c',
    500: '#1b2b73',
    950: '#000000',
  },
}

SCSS

$custom: #1b2b73;
$custom-light: #66649c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2b73",
  "rgb": {
    "r": 27,
    "g": 43,
    "b": 115
  },
  "hsl": {
    "h": 229.091,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.32547,
    "c": 0.12521,
    "h": 268.7
  },
  "luminance": 0.03199
}

Semantic roles & 50–950 ramp

primary

#1B2B73

secondary

#A89542

accent

#C843E5

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #1B2B73

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

Preview Lab → · Contrast checker → · Palette generator →