#1B445B#1B445B

#1B445B is a dark, moderate cyan. Relative luminance 0.051; OKLCH L 36.9% C 0.060 H 236.3°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#1B445B
RGB	rgb(27, 68, 91)
HSL	hsl(202, 54%, 23%)
HSV	hsv(202, 70%, 36%)
CMYK	cmyk(70.3%, 25.3%, 0%, 64.3%)
CIE-LAB	lab(27.08, -6.07, -17.88)
CIE-LCH	lch(27.08, 18.88, 251.26°)
OKLab	oklab(36.87% -0.0335 -0.0502)
OKLCH	oklch(36.87% 0.06 236.3)
XYZ	xyz(4.4067, 5.1221, 10.6519)
Luminance	0.0512 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B445B #5B321B

analogous

#1B5B52 #1B445B #1B245B

triadic

#1B445B #5B1B44 #445B1B

tetradic

#1B445B #521B5B #5B321B #245B1B

square

#1B445B #521B5B #5B321B #245B1B

split-complementary

#1B445B #5B1B24 #5B521B

monochromatic

#071218 #0D212C #1B445B #29678A #378BB9

Accessibility & contrast

On white

10.37

#1B445B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#1B445B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B445B

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B445B	#FFFFFF	#000000	##FFFFFF
##1B445B	1.00	10.37	2.02	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#39445C

Deuteranopia (green-blind)

#303D5B

Tritanopia (blue-blind)

#004A4C

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1b445b;
/* rgb */ color: rgb(27, 68, 91);
/* oklch */ color: oklch(36.9% 0.060 236.3);

Tailwind

colors: {
  custom: {
    50: '#5f7789',
    500: '#1b445b',
    950: '#000000',
  },
}

SCSS

$custom: #1b445b;
$custom-light: #5f7789;
$custom-dark: #000000;

JSON

{
  "hex": "#1b445b",
  "rgb": {
    "r": 27,
    "g": 68,
    "b": 91
  },
  "hsl": {
    "h": 201.563,
    "s": 54.237,
    "l": 23.137
  },
  "oklch": {
    "l": 0.36866,
    "c": 0.06035,
    "h": 236.3
  },
  "luminance": 0.05123
}

Semantic roles & 50–950 ramp

primary

#1B445B

secondary

#915E41

accent

#7F4ADE

background

#F5F7F8

surface

#EAEDF0

border

#C6C8CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #1B445B

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

Preview Lab → · Contrast checker → · Palette generator →