#1B5366#1B5366

#1B5366 is a dark, moderate cyan. Relative luminance 0.074; OKLCH L 41.5% C 0.065 H 224.4°. Best body text is #FFFFFF at 8.48:1 contrast (WCAG AA passes).

Color values

HEX	#1B5366
RGB	rgb(27, 83, 102)
HSL	hsl(195, 58%, 25%)
HSV	hsv(195, 74%, 40%)
CMYK	cmyk(73.5%, 18.6%, 0%, 60%)
CIE-LAB	lab(32.65, -11.26, -16.28)
CIE-LCH	lch(32.65, 19.80, 235.33°)
OKLab	oklab(41.48% -0.0465 -0.0455)
OKLCH	oklch(41.48% 0.065 224.4)
XYZ	xyz(5.9425, 7.3782, 13.6787)
Luminance	0.0738 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B5366 #662E1B

analogous

#1B6653 #1B5366 #1B2D66

triadic

#1B5366 #661B53 #53661B

tetradic

#1B5366 #531B66 #662E1B #2D661B

square

#1B5366 #531B66 #662E1B #2D661B

split-complementary

#1B5366 #661B2D #66531B

monochromatic

#061418 #0E2C36 #1B5366 #287A96 #35A2C7

Accessibility & contrast

On white

8.48

#1B5366 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.48

#1B5366 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B5366

8.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B5366	#FFFFFF	#000000	##FFFFFF
##1B5366	1.00	8.48	2.48	8.48
#FFFFFF	8.48	1.00	21.00	1.00
#000000	2.48	21.00	1.00	21.00
##FFFFFF	8.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#485167

Deuteranopia (green-blind)

#3E4966

Tritanopia (blue-blind)

#005959

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1b5366;
/* rgb */ color: rgb(27, 83, 102);
/* oklch */ color: oklch(41.5% 0.065 224.4);

Tailwind

colors: {
  custom: {
    50: '#628391',
    500: '#1b5366',
    950: '#000000',
  },
}

SCSS

$custom: #1b5366;
$custom-light: #628391;
$custom-dark: #000000;

JSON

{
  "hex": "#1b5366",
  "rgb": {
    "r": 27,
    "g": 83,
    "b": 102
  },
  "hsl": {
    "h": 195.2,
    "s": 58.14,
    "l": 25.294
  },
  "oklch": {
    "l": 0.41478,
    "c": 0.06509,
    "h": 224.4
  },
  "luminance": 0.07379
}

Semantic roles & 50–950 ramp

primary

#1B5366

secondary

#9B5841

accent

#6E46E1

background

#F6F8F8

surface

#EBEFF0

border

#C6CACB

text

#060A0C

muted

#7A7C7D

Preview Lab

Preview with #1B5366

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

Preview Lab → · Contrast checker → · Palette generator →