#1B3255#1B3255

#1B3255 is a dark, moderate blue. Relative luminance 0.032; OKLCH L 31.8% C 0.069 H 258.6°. Best body text is #FFFFFF at 12.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B3255
RGB	rgb(27, 50, 85)
HSL	hsl(216, 52%, 22%)
HSV	hsv(216, 68%, 33%)
CMYK	cmyk(68.2%, 41.2%, 0%, 66.7%)
CIE-LAB	lab(20.71, 3.74, -23.94)
CIE-LCH	lch(20.71, 24.23, 278.89°)
OKLab	oklab(31.75% -0.0138 -0.068)
OKLCH	oklch(31.75% 0.069 258.6)
XYZ	xyz(3.2317, 3.1698, 9.0341)
Luminance	0.0317 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3255 #553E1B

analogous

#1B4F55 #1B3255 #211B55

triadic

#1B3255 #551B32 #32551B

tetradic

#1B3255 #551B4F #553E1B #1B5521

square

#1B3255 #551B4F #553E1B #1B5521

split-complementary

#1B3255 #55211B #4F551B

monochromatic

#070E17 #0C1727 #1B3255 #2A4D83 #3969B2

Accessibility & contrast

On white

12.85

#1B3255 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1B3255 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3255

12.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3255	#FFFFFF	#000000	##FFFFFF
##1B3255	1.00	12.85	1.63	12.85
#FFFFFF	12.85	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#233556

Deuteranopia (green-blind)

#1B2F54

Tritanopia (blue-blind)

#003A3F

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b3255;
/* rgb */ color: rgb(27, 50, 85);
/* oklch */ color: oklch(31.8% 0.069 258.6);

Tailwind

colors: {
  custom: {
    50: '#5e6985',
    500: '#1b3255',
    950: '#000000',
  },
}

SCSS

$custom: #1b3255;
$custom-light: #5e6985;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3255",
  "rgb": {
    "r": 27,
    "g": 50,
    "b": 85
  },
  "hsl": {
    "h": 216.207,
    "s": 51.786,
    "l": 21.961
  },
  "oklch": {
    "l": 0.3175,
    "c": 0.06936,
    "h": 258.6
  },
  "luminance": 0.0317
}

Semantic roles & 50–950 ramp

primary

#1B3255

secondary

#8B6E41

accent

#A34DDB

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#05060B

muted

#797A7C

Preview Lab

Preview with #1B3255

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

Preview Lab → · Contrast checker → · Palette generator →