#1B2F63#1B2F63

#1B2F63 is a dark, moderate blue. Relative luminance 0.032; OKLCH L 32.0% C 0.095 H 265.5°. Best body text is #FFFFFF at 12.86:1 contrast (WCAG AA passes).

Color values

HEX	#1B2F63
RGB	rgb(27, 47, 99)
HSL	hsl(223, 57%, 25%)
HSV	hsv(223, 73%, 39%)
CMYK	cmyk(72.7%, 52.5%, 0%, 61.2%)
CIE-LAB	lab(20.70, 11.58, -33.19)
CIE-LCH	lch(20.70, 35.15, 289.23°)
OKLab	oklab(32.05% -0.0075 -0.0952)
OKLCH	oklch(32.05% 0.095 265.5)
XYZ	xyz(3.7199, 3.1665, 12.2171)
Luminance	0.0317 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2F63 #634F1B

analogous

#1B5363 #1B2F63 #2B1B63

triadic

#1B2F63 #631B2F #2F631B

tetradic

#1B2F63 #631B53 #634F1B #1B632B

square

#1B2F63 #631B53 #634F1B #1B632B

split-complementary

#1B2F63 #632B1B #53631B

monochromatic

#070B18 #0E1833 #1B2F63 #284693 #355DC3

Accessibility & contrast

On white

12.86

#1B2F63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.63

#1B2F63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2F63

12.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2F63	#FFFFFF	#000000	##FFFFFF
##1B2F63	1.00	12.86	1.63	12.86
#FFFFFF	12.86	1.00	21.00	1.00
#000000	1.63	21.00	1.00	21.00
##FFFFFF	12.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#123565

Deuteranopia (green-blind)

#002F62

Tritanopia (blue-blind)

#003B44

Achromatopsia (no color)

#323232

Design tokens & code

CSS

--color: #1b2f63;
/* rgb */ color: rgb(27, 47, 99);
/* oklch */ color: oklch(32.0% 0.095 265.5);

Tailwind

colors: {
  custom: {
    50: '#616790',
    500: '#1b2f63',
    950: '#000000',
  },
}

SCSS

$custom: #1b2f63;
$custom-light: #616790;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2f63",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 99
  },
  "hsl": {
    "h": 223.333,
    "s": 57.143,
    "l": 24.706
  },
  "oklch": {
    "l": 0.32046,
    "c": 0.09549,
    "h": 265.5
  },
  "luminance": 0.03167
}

Semantic roles & 50–950 ramp

primary

#1B2F63

secondary

#988041

accent

#B647E0

background

#F6F6F8

surface

#EBEBF0

border

#C6C6CB

text

#05060C

muted

#7A7A7D

Preview Lab

Preview with #1B2F63

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

Preview Lab → · Contrast checker → · Palette generator →