#1B384D#1B384D

#1B384D is a dark, muted cyan. Relative luminance 0.036; OKLCH L 32.8% C 0.051 H 242.0°. Best body text is #FFFFFF at 12.21:1 contrast (WCAG AA passes).

Color values

HEX	#1B384D
RGB	rgb(27, 56, 77)
HSL	hsl(205, 48%, 20%)
HSV	hsv(205, 65%, 30%)
CMYK	cmyk(64.9%, 27.3%, 0%, 69.8%)
CIE-LAB	lab(22.29, -3.51, -16.13)
CIE-LCH	lch(22.29, 16.51, 257.72°)
OKLab	oklab(32.84% -0.024 -0.0452)
OKLCH	oklch(32.84% 0.051 242)
XYZ	xyz(3.2052, 3.5969, 7.5451)
Luminance	0.0360 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B384D #4D301B

analogous

#1B4D49 #1B384D #1B1F4D

triadic

#1B384D #4D1B38 #384D1B

tetradic

#1B384D #491B4D #4D301B #1F4D1B

square

#1B384D #491B4D #4D301B #1F4D1B

split-complementary

#1B384D #4D1B1F #4D491B

monochromatic

#081017 #0B1720 #1B384D #2B597A #3B7AA8

Accessibility & contrast

On white

12.21

#1B384D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1B384D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B384D

12.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B384D	#FFFFFF	#000000	##FFFFFF
##1B384D	1.00	12.21	1.72	12.21
#FFFFFF	12.21	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F384E

Deuteranopia (green-blind)

#28334D

Tritanopia (blue-blind)

#003D3F

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b384d;
/* rgb */ color: rgb(27, 56, 77);
/* oklch */ color: oklch(32.8% 0.051 242.0);

Tailwind

colors: {
  custom: {
    50: '#5d6e7f',
    500: '#1b384d',
    950: '#000000',
  },
}

SCSS

$custom: #1b384d;
$custom-light: #5d6e7f;
$custom-dark: #000000;

JSON

{
  "hex": "#1b384d",
  "rgb": {
    "r": 27,
    "g": 56,
    "b": 77
  },
  "hsl": {
    "h": 205.2,
    "s": 48.077,
    "l": 20.392
  },
  "oklch": {
    "l": 0.32843,
    "c": 0.05122,
    "h": 242
  },
  "luminance": 0.03597
}

Semantic roles & 50–950 ramp

primary

#1B384D

secondary

#835D41

accent

#8950D8

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#04070A

muted

#797A7C

Preview Lab

Preview with #1B384D

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

Preview Lab → · Contrast checker → · Palette generator →