#1B366F#1B366F

#1B366F is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.6% C 0.104 H 263.0°. Best body text is #FFFFFF at 11.64:1 contrast (WCAG AA passes).

Color values

HEX	#1B366F
RGB	rgb(27, 54, 111)
HSL	hsl(221, 61%, 27%)
HSV	hsv(221, 76%, 44%)
CMYK	cmyk(75.7%, 51.4%, 0%, 56.5%)
CIE-LAB	lab(23.73, 11.47, -36.07)
CIE-LCH	lch(23.73, 37.85, 287.64°)
OKLab	oklab(34.64% -0.0127 -0.1036)
OKLCH	oklch(34.64% 0.104 263)
XYZ	xyz(4.6394, 4.0185, 15.5670)
Luminance	0.0402 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B366F #6F541B

analogous

#1B606F #1B366F #2A1B6F

triadic

#1B366F #6F1B36 #366F1B

tetradic

#1B366F #6F1B60 #6F541B #1B6F2A

square

#1B366F #6F1B60 #6F541B #1B6F2A

split-complementary

#1B366F #6F2A1B #606F1B

monochromatic

#060C19 #0F1E3E #1B366F #274EA0 #3667CE

Accessibility & contrast

On white

11.64

#1B366F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1B366F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B366F

11.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B366F	#FFFFFF	#000000	##FFFFFF
##1B366F	1.00	11.64	1.80	11.64
#FFFFFF	11.64	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#163D71

Deuteranopia (green-blind)

#00356E

Tritanopia (blue-blind)

#00434D

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1b366f;
/* rgb */ color: rgb(27, 54, 111);
/* oklch */ color: oklch(34.6% 0.104 263.0);

Tailwind

colors: {
  custom: {
    50: '#646c99',
    500: '#1b366f',
    950: '#000000',
  },
}

SCSS

$custom: #1b366f;
$custom-light: #646c99;
$custom-dark: #000000;

JSON

{
  "hex": "#1b366f",
  "rgb": {
    "r": 27,
    "g": 54,
    "b": 111
  },
  "hsl": {
    "h": 220.714,
    "s": 60.87,
    "l": 27.059
  },
  "oklch": {
    "l": 0.34643,
    "c": 0.10433,
    "h": 263
  },
  "luminance": 0.04019
}

Semantic roles & 50–950 ramp

primary

#1B366F

secondary

#A48442

accent

#B144E4

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1B366F

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

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