#1B404A#1B404A

#1B404A is a dark, muted cyan. Relative luminance 0.044; OKLCH L 34.9% C 0.045 H 218.0°. Best body text is #FFFFFF at 11.18:1 contrast (WCAG AA passes).

Color values

HEX	#1B404A
RGB	rgb(27, 64, 74)
HSL	hsl(193, 47%, 20%)
HSV	hsv(193, 64%, 29%)
CMYK	cmyk(63.5%, 13.5%, 0%, 71%)
CIE-LAB	lab(24.93, -9.76, -10.08)
CIE-LCH	lch(24.93, 14.03, 225.92°)
OKLab	oklab(34.9% -0.0358 -0.0279)
OKLCH	oklch(34.9% 0.045 218)
XYZ	xyz(3.5209, 4.3939, 7.1398)
Luminance	0.0439 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B404A #4A251B

analogous

#1B4A3D #1B404A #1B294A

triadic

#1B404A #4A1B40 #404A1B

tetradic

#1B404A #3D1B4A #4A251B #294A1B

square

#1B404A #3D1B4A #4A251B #294A1B

split-complementary

#1B404A #4A1B29 #4A3D1B

monochromatic

#081316 #0B191D #1B404A #2B6777 #3C8EA4

Accessibility & contrast

On white

11.18

#1B404A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1B404A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B404A

11.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B404A	#FFFFFF	#000000	##FFFFFF
##1B404A	1.00	11.18	1.88	11.18
#FFFFFF	11.18	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393E4B

Deuteranopia (green-blind)

#33394A

Tritanopia (blue-blind)

#004443

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b404a;
/* rgb */ color: rgb(27, 64, 74);
/* oklch */ color: oklch(34.9% 0.045 218.0);

Tailwind

colors: {
  custom: {
    50: '#5d747c',
    500: '#1b404a',
    950: '#000000',
  },
}

SCSS

$custom: #1b404a;
$custom-light: #5d747c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b404a",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 74
  },
  "hsl": {
    "h": 192.766,
    "s": 46.535,
    "l": 19.804
  },
  "oklch": {
    "l": 0.349,
    "c": 0.04543,
    "h": 218
  },
  "luminance": 0.04394
}

Semantic roles & 50–950 ramp

primary

#1B404A

secondary

#804E41

accent

#6E52D6

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #1B404A

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

Preview Lab → · Contrast checker → · Palette generator →