#1B366B#1B366B

#1B366B is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.3% C 0.098 H 262.2°. Best body text is #FFFFFF at 11.75:1 contrast (WCAG AA passes).

Color values

HEX	#1B366B
RGB	rgb(27, 54, 107)
HSL	hsl(220, 60%, 26%)
HSV	hsv(220, 75%, 42%)
CMYK	cmyk(74.8%, 49.5%, 0%, 58%)
CIE-LAB	lab(23.45, 9.83, -33.96)
CIE-LCH	lch(23.45, 35.36, 286.14°)
OKLab	oklab(34.33% -0.0133 -0.0974)
OKLCH	oklch(34.33% 0.098 262.2)
XYZ	xyz(4.4241, 3.9324, 14.4329)
Luminance	0.0393 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B366B #6B501B

analogous

#1B5E6B #1B366B #281B6B

triadic

#1B366B #6B1B36 #366B1B

tetradic

#1B366B #6B1B5E #6B501B #1B6B28

square

#1B366B #6B1B5E #6B501B #1B6B28

split-complementary

#1B366B #6B281B #5E6B1B

monochromatic

#060C18 #0F1D3A #1B366B #274F9C #3568CC

Accessibility & contrast

On white

11.75

#1B366B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1B366B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B366B

11.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B366B	#FFFFFF	#000000	##FFFFFF
##1B366B	1.00	11.75	1.79	11.75
#FFFFFF	11.75	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A3C6D

Deuteranopia (green-blind)

#07346A

Tritanopia (blue-blind)

#00424B

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b366b;
/* rgb */ color: rgb(27, 54, 107);
/* oklch */ color: oklch(34.3% 0.098 262.2);

Tailwind

colors: {
  custom: {
    50: '#636c96',
    500: '#1b366b',
    950: '#000000',
  },
}

SCSS

$custom: #1b366b;
$custom-light: #636c96;
$custom-dark: #000000;

JSON

{
  "hex": "#1b366b",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 107
  },
  "hsl": {
    "h": 219.75,
    "s": 59.701,
    "l": 26.275
  },
  "oklch": {
    "l": 0.34332,
    "c": 0.09826,
    "h": 262.2
  },
  "luminance": 0.03933
}

Semantic roles & 50–950 ramp

primary

#1B366B

secondary

#A08042

accent

#AE45E3

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1B366B

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

Preview Lab → · Contrast checker → · Palette generator →