#1B404D#1B404D

#1B404D is a dark, muted cyan. Relative luminance 0.044; OKLCH L 35.0% C 0.048 H 223.8°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#1B404D
RGB	rgb(27, 64, 77)
HSL	hsl(196, 48%, 20%)
HSV	hsv(196, 65%, 30%)
CMYK	cmyk(64.9%, 16.9%, 0%, 69.8%)
CIE-LAB	lab(25.06, -8.69, -11.86)
CIE-LCH	lch(25.06, 14.70, 233.75°)
OKLab	oklab(35.05% -0.0344 -0.033)
OKLCH	oklch(35.05% 0.048 223.8)
XYZ	xyz(3.6244, 4.4353, 7.6848)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B404D #4D281B

analogous

#1B4D41 #1B404D #1B274D

triadic

#1B404D #4D1B40 #404D1B

tetradic

#1B404D #411B4D #4D281B #274D1B

square

#1B404D #411B4D #4D281B #274D1B

split-complementary

#1B404D #4D1B27 #4D411B

monochromatic

#081317 #0B1A20 #1B404D #2B667A #3B8BA8

Accessibility & contrast

On white

11.13

#1B404D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#1B404D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B404D

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B404D	#FFFFFF	#000000	##FFFFFF
##1B404D	1.00	11.13	1.89	11.13
#FFFFFF	11.13	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393E4E

Deuteranopia (green-blind)

#31394D

Tritanopia (blue-blind)

#004444

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b404d;
/* rgb */ color: rgb(27, 64, 77);
/* oklch */ color: oklch(35.0% 0.048 223.8);

Tailwind

colors: {
  custom: {
    50: '#5d747e',
    500: '#1b404d',
    950: '#000000',
  },
}

SCSS

$custom: #1b404d;
$custom-light: #5d747e;
$custom-dark: #000000;

JSON

{
  "hex": "#1b404d",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 77
  },
  "hsl": {
    "h": 195.6,
    "s": 48.077,
    "l": 20.392
  },
  "oklch": {
    "l": 0.35045,
    "c": 0.04769,
    "h": 223.8
  },
  "luminance": 0.04436
}

Semantic roles & 50–950 ramp

primary

#1B404D

secondary

#835241

accent

#7350D8

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#04080A

muted

#797B7C

Preview Lab

Preview with #1B404D

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

Preview Lab → · Contrast checker → · Palette generator →