#1B405C#1B405C

#1B405C is a dark, moderate cyan. Relative luminance 0.047; OKLCH L 35.9% C 0.065 H 243.9°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B405C
RGB	rgb(27, 64, 92)
HSL	hsl(206, 55%, 23%)
HSV	hsv(206, 71%, 36%)
CMYK	cmyk(70.7%, 30.4%, 0%, 63.9%)
CIE-LAB	lab(25.78, -3.08, -20.55)
CIE-LCH	lch(25.78, 20.78, 261.47°)
OKLab	oklab(35.85% -0.0284 -0.058)
OKLCH	oklch(35.85% 0.065 243.9)
XYZ	xyz(4.2164, 4.6721, 10.8027)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B405C #5C371B

analogous

#1B5C57 #1B405C #1B1F5C

triadic

#1B405C #5C1B40 #405C1B

tetradic

#1B405C #571B5C #5C371B #1F5C1B

square

#1B405C #571B5C #5C371B #1F5C1B

split-complementary

#1B405C #5C1B1F #5C571B

monochromatic

#071018 #0D1F2D #1B405C #29618B #3782BB

Accessibility & contrast

On white

10.85

#1B405C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1B405C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B405C

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B405C	#FFFFFF	#000000	##FFFFFF
##1B405C	1.00	10.85	1.93	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#33415D

Deuteranopia (green-blind)

#2B3A5B

Tritanopia (blue-blind)

#00474A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b405c;
/* rgb */ color: rgb(27, 64, 92);
/* oklch */ color: oklch(35.9% 0.065 243.9);

Tailwind

colors: {
  custom: {
    50: '#5f748a',
    500: '#1b405c',
    950: '#000000',
  },
}

SCSS

$custom: #1b405c;
$custom-light: #5f748a;
$custom-dark: #000000;

JSON

{
  "hex": "#1b405c",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 92
  },
  "hsl": {
    "h": 205.846,
    "s": 54.622,
    "l": 23.333
  },
  "oklch": {
    "l": 0.35853,
    "c": 0.06453,
    "h": 243.9
  },
  "luminance": 0.04673
}

Semantic roles & 50–950 ramp

primary

#1B405C

secondary

#926441

accent

#8A4ADE

background

#F5F7F8

surface

#EAEDF0

border

#C6C8CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #1B405C

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

Preview Lab → · Contrast checker → · Palette generator →