#1B3263#1B3263

#1B3263 is a dark, moderate blue. Relative luminance 0.034; OKLCH L 32.8% C 0.091 H 263.3°. Best body text is #FFFFFF at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#1B3263
RGB	rgb(27, 50, 99)
HSL	hsl(221, 57%, 25%)
HSV	hsv(221, 73%, 39%)
CMYK	cmyk(72.7%, 49.5%, 0%, 61.2%)
CIE-LAB	lab(21.63, 9.41, -31.69)
CIE-LCH	lch(21.63, 33.06, 286.54°)
OKLab	oklab(32.76% -0.0106 -0.0907)
OKLCH	oklch(32.76% 0.091 263.3)
XYZ	xyz(3.8439, 3.4147, 12.2585)
Luminance	0.0341 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3263 #634C1B

analogous

#1B5663 #1B3263 #281B63

triadic

#1B3263 #631B32 #32631B

tetradic

#1B3263 #631B56 #634C1B #1B6328

square

#1B3263 #631B56 #634C1B #1B6328

split-complementary

#1B3263 #63281B #56631B

monochromatic

#070C18 #0E1A33 #1B3263 #284A93 #3563C3

Accessibility & contrast

On white

12.48

#1B3263 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1B3263 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3263

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3263	#FFFFFF	#000000	##FFFFFF
##1B3263	1.00	12.48	1.68	12.48
#FFFFFF	12.48	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#193765

Deuteranopia (green-blind)

#0A3162

Tritanopia (blue-blind)

#003D45

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b3263;
/* rgb */ color: rgb(27, 50, 99);
/* oklch */ color: oklch(32.8% 0.091 263.3);

Tailwind

colors: {
  custom: {
    50: '#616990',
    500: '#1b3263',
    950: '#000000',
  },
}

SCSS

$custom: #1b3263;
$custom-light: #616990;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3263",
  "rgb": {
    "r": 27,
    "g": 50,
    "b": 99
  },
  "hsl": {
    "h": 220.833,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.32761,
    "c": 0.09135,
    "h": 263.3
  },
  "luminance": 0.03415
}

Semantic roles & 50–950 ramp

primary

#1B3263

secondary

#987D41

accent

#B047E0

background

#F6F6F8

surface

#EBEBF0

border

#C6C6CB

text

#05060C

muted

#7A7A7D

Preview Lab

Preview with #1B3263

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

Preview Lab → · Contrast checker → · Palette generator →