#1B366D#1B366D

#1B366D is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.5% C 0.101 H 262.6°. Best body text is #FFFFFF at 11.70:1 contrast (WCAG AA passes).

Color values

HEX	#1B366D
RGB	rgb(27, 54, 109)
HSL	hsl(220, 60%, 27%)
HSV	hsv(220, 75%, 43%)
CMYK	cmyk(75.2%, 50.5%, 0%, 57.3%)
CIE-LAB	lab(23.59, 10.65, -35.02)
CIE-LCH	lch(23.59, 36.61, 286.91°)
OKLab	oklab(34.49% -0.013 -0.1005)
OKLCH	oklch(34.49% 0.101 262.6)
XYZ	xyz(4.5305, 3.9750, 14.9935)
Luminance	0.0398 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B366D #6D521B

analogous

#1B5F6D #1B366D #291B6D

triadic

#1B366D #6D1B36 #366D1B

tetradic

#1B366D #6D1B5F #6D521B #1B6D29

square

#1B366D #6D1B5F #6D521B #1B6D29

split-complementary

#1B366D #6D291B #5F6D1B

monochromatic

#060C19 #0F1E3C #1B366D #274E9E #3567CD

Accessibility & contrast

On white

11.70

#1B366D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1B366D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B366D

11.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B366D	#FFFFFF	#000000	##FFFFFF
##1B366D	1.00	11.70	1.80	11.70
#FFFFFF	11.70	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#183C6F

Deuteranopia (green-blind)

#03356C

Tritanopia (blue-blind)

#00434C

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b366d;
/* rgb */ color: rgb(27, 54, 109);
/* oklch */ color: oklch(34.5% 0.101 262.6);

Tailwind

colors: {
  custom: {
    50: '#636c97',
    500: '#1b366d',
    950: '#000000',
  },
}

SCSS

$custom: #1b366d;
$custom-light: #636c97;
$custom-dark: #000000;

JSON

{
  "hex": "#1b366d",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 109
  },
  "hsl": {
    "h": 220.244,
    "s": 60.294,
    "l": 26.667
  },
  "oklch": {
    "l": 0.34487,
    "c": 0.1013,
    "h": 262.6
  },
  "luminance": 0.03975
}

Semantic roles & 50–950 ramp

primary

#1B366D

secondary

#A28242

accent

#AF44E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1B366D

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

Preview Lab → · Contrast checker → · Palette generator →