#1B588D#1B588D

#1B588D is a dark, moderate cyan. Relative luminance 0.091; OKLCH L 45.0% C 0.106 H 249.0°. Best body text is #FFFFFF at 7.43:1 contrast (WCAG AA passes).

Color values

HEX	#1B588D
RGB	rgb(27, 88, 141)
HSL	hsl(208, 68%, 33%)
HSV	hsv(208, 81%, 55%)
CMYK	cmyk(80.9%, 37.6%, 0%, 44.7%)
CIE-LAB	lab(36.24, 0.57, -34.79)
CIE-LCH	lch(36.24, 34.80, 270.93°)
OKLab	oklab(44.97% -0.038 -0.0991)
OKLCH	oklch(44.97% 0.106 249)
XYZ	xyz(8.7476, 9.1345, 26.4962)
Luminance	0.0914 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B588D #8D501B

analogous

#1B8D89 #1B588D #1B1F8D

triadic

#1B588D #8D1B58 #588D1B

tetradic

#1B588D #891B8D #8D501B #1F8D1B

square

#1B588D #891B8D #8D501B #1F8D1B

split-complementary

#1B588D #8D1B1F #8D891B

monochromatic

#071826 #11385A #1B588D #2578C0 #4796DC

Accessibility & contrast

On white

7.43

#1B588D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#1B588D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B588D

7.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B588D	#FFFFFF	#000000	##FFFFFF
##1B588D	1.00	7.43	2.83	7.43
#FFFFFF	7.43	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F5B8F

Deuteranopia (green-blind)

#2E518C

Tritanopia (blue-blind)

#00656B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1b588d;
/* rgb */ color: rgb(27, 88, 141);
/* oklch */ color: oklch(45.0% 0.106 249.0);

Tailwind

colors: {
  custom: {
    50: '#6a86ae',
    500: '#1b588d',
    950: '#000000',
  },
}

SCSS

$custom: #1b588d;
$custom-light: #6a86ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b588d",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 141
  },
  "hsl": {
    "h": 207.895,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.44969,
    "c": 0.10618,
    "h": 249
  },
  "luminance": 0.09136
}

Semantic roles & 50–950 ramp

primary

#1B588D

secondary

#BD7E46

accent

#8E3DEB

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #1B588D

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

Preview Lab → · Contrast checker → · Palette generator →