#1B405D#1B405D

#1B405D is a dark, moderate cyan. Relative luminance 0.047; OKLCH L 35.9% C 0.066 H 244.8°. Best body text is #FFFFFF at 10.84:1 contrast (WCAG AA passes).

Color values

HEX	#1B405D
RGB	rgb(27, 64, 93)
HSL	hsl(206, 55%, 24%)
HSV	hsv(206, 71%, 36%)
CMYK	cmyk(71%, 31.2%, 0%, 63.5%)
CIE-LAB	lab(25.83, -2.70, -21.12)
CIE-LCH	lch(25.83, 21.29, 262.72°)
OKLab	oklab(35.91% -0.028 -0.0596)
OKLCH	oklch(35.91% 0.066 244.8)
XYZ	xyz(4.2604, 4.6897, 11.0345)
Luminance	0.0469 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B405D #5D381B

analogous

#1B5D59 #1B405D #1B1F5D

triadic

#1B405D #5D1B40 #405D1B

tetradic

#1B405D #591B5D #5D381B #1F5D1B

square

#1B405D #591B5D #5D381B #1F5D1B

split-complementary

#1B405D #5D1B1F #5D591B

monochromatic

#071018 #0D1F2E #1B405D #29618C #3781BC

Accessibility & contrast

On white

10.84

#1B405D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1B405D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B405D

10.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B405D	#FFFFFF	#000000	##FFFFFF
##1B405D	1.00	10.84	1.94	10.84
#FFFFFF	10.84	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.84	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#33415E

Deuteranopia (green-blind)

#2A3A5C

Tritanopia (blue-blind)

#00474A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1b405d;
/* rgb */ color: rgb(27, 64, 93);
/* oklch */ color: oklch(35.9% 0.066 244.8);

Tailwind

colors: {
  custom: {
    50: '#60748b',
    500: '#1b405d',
    950: '#000000',
  },
}

SCSS

$custom: #1b405d;
$custom-light: #60748b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b405d",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 93
  },
  "hsl": {
    "h": 206.364,
    "s": 55,
    "l": 23.529
  },
  "oklch": {
    "l": 0.35911,
    "c": 0.06585,
    "h": 244.8
  },
  "luminance": 0.0469
}

Semantic roles & 50–950 ramp

primary

#1B405D

secondary

#936541

accent

#8B49DE

background

#F5F7F8

surface

#EAEDF0

border

#C6C8CB

text

#05080C

muted

#797B7D

Preview Lab

Preview with #1B405D

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

Preview Lab → · Contrast checker → · Palette generator →