#1B1D52#1B1D52

#1B1D52 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.095 H 276.2°. Best body text is #FFFFFF at 15.62:1 contrast (WCAG AA passes).

Color values

HEX	#1B1D52
RGB	rgb(27, 29, 82)
HSL	hsl(238, 50%, 21%)
HSV	hsv(238, 67%, 32%)
CMYK	cmyk(67.1%, 64.6%, 0%, 67.8%)
CIE-LAB	lab(13.95, 17.89, -32.78)
CIE-LCH	lch(13.95, 37.34, 298.62°)
OKLab	oklab(26.53% 0.0102 -0.0942)
OKLCH	oklch(26.53% 0.095 276.2)
XYZ	xyz(2.4139, 1.7207, 8.1859)
Luminance	0.0172 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1D52 #52501B

analogous

#1B3952 #1B1D52 #351B52

triadic

#1B1D52 #521B1D #1D521B

tetradic

#1B1D52 #521B39 #52501B #1B5235

square

#1B1D52 #521B39 #52501B #1B5235

split-complementary

#1B1D52 #52351B #39521B

monochromatic

#080817 #0C0D24 #1B1D52 #2A2D80 #393EAE

Accessibility & contrast

On white

15.62

#1B1D52 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#1B1D52 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1D52

15.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1D52	#FFFFFF	#000000	##FFFFFF
##1B1D52	1.00	15.62	1.34	15.62
#FFFFFF	15.62	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002654

Deuteranopia (green-blind)

#002151

Tritanopia (blue-blind)

#002A34

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #1b1d52;
/* rgb */ color: rgb(27, 29, 82);
/* oklch */ color: oklch(26.5% 0.095 276.2);

Tailwind

colors: {
  custom: {
    50: '#5e5983',
    500: '#1b1d52',
    950: '#000000',
  },
}

SCSS

$custom: #1b1d52;
$custom-light: #5e5983;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1d52",
  "rgb": {
    "r": 27,
    "g": 29,
    "b": 82
  },
  "hsl": {
    "h": 237.818,
    "s": 50.459,
    "l": 21.373
  },
  "oklch": {
    "l": 0.26535,
    "c": 0.0948,
    "h": 276.2
  },
  "luminance": 0.01721
}

Semantic roles & 50–950 ramp

primary

#1B1D52

secondary

#888541

accent

#D54EDA

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#05030B

muted

#79787C

Preview Lab

Preview with #1B1D52

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

Preview Lab → · Contrast checker → · Palette generator →