#1B404C#1B404C

#1B404C is a dark, muted cyan. Relative luminance 0.044; OKLCH L 35.0% C 0.047 H 221.9°. Best body text is #FFFFFF at 11.14:1 contrast (WCAG AA passes).

Color values

HEX	#1B404C
RGB	rgb(27, 64, 76)
HSL	hsl(195, 48%, 20%)
HSV	hsv(195, 64%, 30%)
CMYK	cmyk(64.5%, 15.8%, 0%, 70.2%)
CIE-LAB	lab(25.02, -9.05, -11.26)
CIE-LCH	lch(25.02, 14.45, 231.22°)
OKLab	oklab(35% -0.0349 -0.0313)
OKLCH	oklch(35% 0.047 221.9)
XYZ	xyz(3.5894, 4.4213, 7.5003)
Luminance	0.0442 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B404C #4C271B

analogous

#1B4C3F #1B404C #1B274C

triadic

#1B404C #4C1B40 #404C1B

tetradic

#1B404C #3F1B4C #4C271B #274C1B

square

#1B404C #3F1B4C #4C271B #274C1B

split-complementary

#1B404C #4C1B27 #4C3F1B

monochromatic

#081317 #0B1A1F #1B404C #2B6679 #3B8CA6

Accessibility & contrast

On white

11.14

#1B404C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1B404C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B404C

11.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B404C	#FFFFFF	#000000	##FFFFFF
##1B404C	1.00	11.14	1.88	11.14
#FFFFFF	11.14	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#393E4D

Deuteranopia (green-blind)

#32394C

Tritanopia (blue-blind)

#004444

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1b404c;
/* rgb */ color: rgb(27, 64, 76);
/* oklch */ color: oklch(35.0% 0.047 221.9);

Tailwind

colors: {
  custom: {
    50: '#5d747e',
    500: '#1b404c',
    950: '#000000',
  },
}

SCSS

$custom: #1b404c;
$custom-light: #5d747e;
$custom-dark: #000000;

JSON

{
  "hex": "#1b404c",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 76
  },
  "hsl": {
    "h": 194.694,
    "s": 47.573,
    "l": 20.196
  },
  "oklch": {
    "l": 0.34996,
    "c": 0.04688,
    "h": 221.9
  },
  "luminance": 0.04422
}

Semantic roles & 50–950 ramp

primary

#1B404C

secondary

#825141

accent

#7251D7

background

#F5F7F7

surface

#E9EDEE

border

#C5C8C9

text

#040809

muted

#797B7B

Preview Lab

Preview with #1B404C

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

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