#1B366C#1B366C

#1B366C is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.4% C 0.100 H 262.4°. Best body text is #FFFFFF at 11.73:1 contrast (WCAG AA passes).

Color values

HEX	#1B366C
RGB	rgb(27, 54, 108)
HSL	hsl(220, 60%, 26%)
HSV	hsv(220, 75%, 42%)
CMYK	cmyk(75%, 50%, 0%, 57.6%)
CIE-LAB	lab(23.52, 10.24, -34.49)
CIE-LCH	lch(23.52, 35.98, 286.53°)
OKLab	oklab(34.41% -0.0131 -0.0989)
OKLCH	oklch(34.41% 0.1 262.4)
XYZ	xyz(4.4770, 3.9536, 14.7116)
Luminance	0.0395 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B366C #6C511B

analogous

#1B5F6C #1B366C #291B6C

triadic

#1B366C #6C1B36 #366C1B

tetradic

#1B366C #6C1B5F #6C511B #1B6C29

square

#1B366C #6C1B5F #6C511B #1B6C29

split-complementary

#1B366C #6C291B #5F6C1B

monochromatic

#060C18 #0F1E3B #1B366C #274E9D #3567CC

Accessibility & contrast

On white

11.73

#1B366C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1B366C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B366C

11.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B366C	#FFFFFF	#000000	##FFFFFF
##1B366C	1.00	11.73	1.79	11.73
#FFFFFF	11.73	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.73	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#193C6E

Deuteranopia (green-blind)

#05356B

Tritanopia (blue-blind)

#00434B

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b366c;
/* rgb */ color: rgb(27, 54, 108);
/* oklch */ color: oklch(34.4% 0.100 262.4);

Tailwind

colors: {
  custom: {
    50: '#636c96',
    500: '#1b366c',
    950: '#000000',
  },
}

SCSS

$custom: #1b366c;
$custom-light: #636c96;
$custom-dark: #000000;

JSON

{
  "hex": "#1b366c",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 108
  },
  "hsl": {
    "h": 220,
    "s": 60,
    "l": 26.471
  },
  "oklch": {
    "l": 0.34409,
    "c": 0.09978,
    "h": 262.4
  },
  "luminance": 0.03954
}

Semantic roles & 50–950 ramp

primary

#1B366C

secondary

#A18142

accent

#AE45E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1B366C

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

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