#1B4366#1B4366

#1B4366 is a dark, moderate cyan. Relative luminance 0.052; OKLCH L 37.2% C 0.075 H 247.8°. Best body text is #FFFFFF at 10.29:1 contrast (WCAG AA passes).

Color values

HEX	#1B4366
RGB	rgb(27, 67, 102)
HSL	hsl(208, 58%, 25%)
HSV	hsv(208, 74%, 40%)
CMYK	cmyk(73.5%, 34.3%, 0%, 60%)
CIE-LAB	lab(27.31, -1.16, -24.60)
CIE-LCH	lch(27.31, 24.62, 267.30°)
OKLab	oklab(37.24% -0.0284 -0.0697)
OKLCH	oklch(37.24% 0.075 247.8)
XYZ	xyz(4.8565, 5.2061, 13.3167)
Luminance	0.0521 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4366 #663E1B

analogous

#1B6663 #1B4366 #1B1D66

triadic

#1B4366 #661B43 #43661B

tetradic

#1B4366 #631B66 #663E1B #1D661B

square

#1B4366 #631B66 #663E1B #1D661B

split-complementary

#1B4366 #661B1D #66631B

monochromatic

#061018 #0E2336 #1B4366 #286396 #3583C7

Accessibility & contrast

On white

10.29

#1B4366 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.04

#1B4366 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4366

10.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4366	#FFFFFF	#000000	##FFFFFF
##1B4366	1.00	10.29	2.04	10.29
#FFFFFF	10.29	1.00	21.00	1.00
#000000	2.04	21.00	1.00	21.00
##FFFFFF	10.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#334468

Deuteranopia (green-blind)

#293D65

Tritanopia (blue-blind)

#004B50

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b4366;
/* rgb */ color: rgb(27, 67, 102);
/* oklch */ color: oklch(37.2% 0.075 247.8);

Tailwind

colors: {
  custom: {
    50: '#627692',
    500: '#1b4366',
    950: '#000000',
  },
}

SCSS

$custom: #1b4366;
$custom-light: #627692;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4366",
  "rgb": {
    "r": 27,
    "g": 67,
    "b": 102
  },
  "hsl": {
    "h": 208,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.37239,
    "c": 0.07523,
    "h": 247.8
  },
  "luminance": 0.05207
}

Semantic roles & 50–950 ramp

primary

#1B4366

secondary

#9B6B41

accent

#8F46E1

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#05080D

muted

#7A7B7D

Preview Lab

Preview with #1B4366

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

Preview Lab → · Contrast checker → · Palette generator →