#1B2864#1B2864

#1B2864 is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.5% C 0.107 H 269.7°. Best body text is #FFFFFF at 13.69:1 contrast (WCAG AA passes).

Color values

HEX	#1B2864
RGB	rgb(27, 40, 100)
HSL	hsl(229, 57%, 25%)
HSV	hsv(229, 73%, 39%)
CMYK	cmyk(73%, 60%, 0%, 60.8%)
CIE-LAB	lab(18.67, 17.06, -37.12)
CIE-LCH	lch(18.67, 40.86, 294.68°)
OKLab	oklab(30.54% -0.0005 -0.1069)
OKLCH	oklch(30.54% 0.107 269.7)
XYZ	xyz(3.5103, 2.6704, 12.3846)
Luminance	0.0267 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2864 #64571B

analogous

#1B4D64 #1B2864 #331B64

triadic

#1B2864 #641B28 #28641B

tetradic

#1B2864 #641B4D #64571B #1B6433

square

#1B2864 #641B4D #64571B #1B6433

split-complementary

#1B2864 #64331B #4D641B

monochromatic

#070A18 #0E1534 #1B2864 #283B94 #354FC4

Accessibility & contrast

On white

13.69

#1B2864 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#1B2864 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2864

13.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2864	#FFFFFF	#000000	##FFFFFF
##1B2864	1.00	13.69	1.53	13.69
#FFFFFF	13.69	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003166

Deuteranopia (green-blind)

#002A63

Tritanopia (blue-blind)

#003741

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #1b2864;
/* rgb */ color: rgb(27, 40, 100);
/* oklch */ color: oklch(30.5% 0.107 269.7);

Tailwind

colors: {
  custom: {
    50: '#626191',
    500: '#1b2864',
    950: '#000000',
  },
}

SCSS

$custom: #1b2864;
$custom-light: #626191;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2864",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 100
  },
  "hsl": {
    "h": 229.315,
    "s": 57.48,
    "l": 24.902
  },
  "oklch": {
    "l": 0.3054,
    "c": 0.10689,
    "h": 269.7
  },
  "luminance": 0.02671
}

Semantic roles & 50–950 ramp

primary

#1B2864

secondary

#998A41

accent

#C547E1

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06050D

muted

#7A797D

Preview Lab

Preview with #1B2864

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

Preview Lab → · Contrast checker → · Palette generator →