#1B3166#1B3166

#1B3166 is a dark, moderate blue. Relative luminance 0.034; OKLCH L 32.8% C 0.097 H 264.6°. Best body text is #FFFFFF at 12.52:1 contrast (WCAG AA passes).

Color values

HEX	#1B3166
RGB	rgb(27, 49, 102)
HSL	hsl(222, 58%, 25%)
HSV	hsv(222, 74%, 40%)
CMYK	cmyk(73.5%, 52%, 0%, 60%)
CIE-LAB	lab(21.54, 11.36, -33.80)
CIE-LCH	lch(21.54, 35.66, 288.58°)
OKLab	oklab(32.76% -0.0091 -0.097)
OKLCH	oklch(32.76% 0.097 264.6)
XYZ	xyz(3.9477, 3.3885, 13.0138)
Luminance	0.0339 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3166 #66501B

analogous

#1B5666 #1B3166 #2A1B66

triadic

#1B3166 #661B31 #31661B

tetradic

#1B3166 #661B56 #66501B #1B662A

square

#1B3166 #661B56 #66501B #1B662A

split-complementary

#1B3166 #662A1B #56661B

monochromatic

#060C18 #0E1A36 #1B3166 #284896 #355FC7

Accessibility & contrast

On white

12.52

#1B3166 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1B3166 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3166

12.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3166	#FFFFFF	#000000	##FFFFFF
##1B3166	1.00	12.52	1.68	12.52
#FFFFFF	12.52	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#143768

Deuteranopia (green-blind)

#013065

Tritanopia (blue-blind)

#003D46

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b3166;
/* rgb */ color: rgb(27, 49, 102);
/* oklch */ color: oklch(32.8% 0.097 264.6);

Tailwind

colors: {
  custom: {
    50: '#626892',
    500: '#1b3166',
    950: '#000000',
  },
}

SCSS

$custom: #1b3166;
$custom-light: #626892;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3166",
  "rgb": {
    "r": 27,
    "g": 49,
    "b": 102
  },
  "hsl": {
    "h": 222.4,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.32756,
    "c": 0.09739,
    "h": 264.6
  },
  "luminance": 0.03389
}

Semantic roles & 50–950 ramp

primary

#1B3166

secondary

#9B8141

accent

#B446E1

background

#F6F6F9

surface

#EBEBF1

border

#C6C6CB

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1B3166

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

Preview Lab → · Contrast checker → · Palette generator →