#1B384C#1B384C

#1B384C is a dark, muted cyan. Relative luminance 0.036; OKLCH L 32.8% C 0.050 H 240.7°. Best body text is #FFFFFF at 12.23:1 contrast (WCAG AA passes).

Color values

HEX	#1B384C
RGB	rgb(27, 56, 76)
HSL	hsl(204, 48%, 20%)
HSV	hsv(204, 64%, 30%)
CMYK	cmyk(64.5%, 26.3%, 0%, 70.2%)
CIE-LAB	lab(22.24, -3.89, -15.54)
CIE-LCH	lch(22.24, 16.02, 255.96°)
OKLab	oklab(32.79% -0.0244 -0.0435)
OKLCH	oklch(32.79% 0.05 240.7)
XYZ	xyz(3.1702, 3.5829, 7.3606)
Luminance	0.0358 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B384C #4C2F1B

analogous

#1B4C47 #1B384C #1B1F4C

triadic

#1B384C #4C1B38 #384C1B

tetradic

#1B384C #471B4C #4C2F1B #1F4C1B

square

#1B384C #471B4C #4C2F1B #1F4C1B

split-complementary

#1B384C #4C1B1F #4C471B

monochromatic

#081117 #0B171F #1B384C #2B5979 #3B7BA6

Accessibility & contrast

On white

12.23

#1B384C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1B384C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B384C

12.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B384C	#FFFFFF	#000000	##FFFFFF
##1B384C	1.00	12.23	1.72	12.23
#FFFFFF	12.23	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F384D

Deuteranopia (green-blind)

#28334C

Tritanopia (blue-blind)

#003D3F

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b384c;
/* rgb */ color: rgb(27, 56, 76);
/* oklch */ color: oklch(32.8% 0.050 240.7);

Tailwind

colors: {
  custom: {
    50: '#5c6e7e',
    500: '#1b384c',
    950: '#000000',
  },
}

SCSS

$custom: #1b384c;
$custom-light: #5c6e7e;
$custom-dark: #000000;

JSON

{
  "hex": "#1b384c",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 76
  },
  "hsl": {
    "h": 204.49,
    "s": 47.573,
    "l": 20.196
  },
  "oklch": {
    "l": 0.32787,
    "c": 0.04992,
    "h": 240.7
  },
  "luminance": 0.03583
}

Semantic roles & 50–950 ramp

primary

#1B384C

secondary

#825B41

accent

#8851D7

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #1B384C

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

Preview Lab → · Contrast checker → · Palette generator →