#1B2973#1B2973

#1B2973 is a dark, vivid blue. Relative luminance 0.031; OKLCH L 32.1% C 0.128 H 269.4°. Best body text is #FFFFFF at 13.03:1 contrast (WCAG AA passes).

Color values

HEX	#1B2973
RGB	rgb(27, 41, 115)
HSL	hsl(230, 62%, 28%)
HSV	hsv(230, 77%, 45%)
CMYK	cmyk(76.5%, 64.3%, 0%, 54.9%)
CIE-LAB	lab(20.27, 22.36, -44.26)
CIE-LCH	lch(20.27, 49.59, 296.80°)
OKLab	oklab(32.14% -0.0012 -0.1278)
OKLCH	oklch(32.14% 0.128 269.4)
XYZ	xyz(4.3384, 3.0562, 16.5776)
Luminance	0.0306 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2973 #73651B

analogous

#1B5573 #1B2973 #391B73

triadic

#1B2973 #731B29 #29731B

tetradic

#1B2973 #731B55 #73651B #1B7339

square

#1B2973 #731B55 #73651B #1B7339

split-complementary

#1B2973 #73391B #55731B

monochromatic

#060919 #0F1741 #1B2973 #273BA5 #3850D0

Accessibility & contrast

On white

13.03

#1B2973 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#1B2973 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2973

13.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2973	#FFFFFF	#000000	##FFFFFF
##1B2973	1.00	13.03	1.61	13.03
#FFFFFF	13.03	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003575

Deuteranopia (green-blind)

#002D72

Tritanopia (blue-blind)

#003C49

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #1b2973;
/* rgb */ color: rgb(27, 41, 115);
/* oklch */ color: oklch(32.1% 0.128 269.4);

Tailwind

colors: {
  custom: {
    50: '#66629c',
    500: '#1b2973',
    950: '#000000',
  },
}

SCSS

$custom: #1b2973;
$custom-light: #66629c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2973",
  "rgb": {
    "r": 27,
    "g": 41,
    "b": 115
  },
  "hsl": {
    "h": 230.455,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.32137,
    "c": 0.12786,
    "h": 269.4
  },
  "luminance": 0.03057
}

Semantic roles & 50–950 ramp

primary

#1B2973

secondary

#A89742

accent

#CB43E5

background

#F6F5F9

surface

#EBEAF2

border

#C6C6CC

text

#07050E

muted

#7A797E

Preview Lab

Preview with #1B2973

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

Preview Lab → · Contrast checker → · Palette generator →