#1B589F#1B589F

#1B589F is a mid, vivid cyan. Relative luminance 0.097; OKLCH L 46.2% C 0.130 H 255.1°. Best body text is #FFFFFF at 7.14:1 contrast (WCAG AA passes).

Color values

HEX	#1B589F
RGB	rgb(27, 88, 159)
HSL	hsl(212, 71%, 36%)
HSV	hsv(212, 83%, 62%)
CMYK	cmyk(83%, 44.7%, 0%, 37.6%)
CIE-LAB	lab(37.32, 7.74, -43.92)
CIE-LCH	lch(37.32, 44.60, 279.99°)
OKLab	oklab(46.17% -0.0336 -0.1259)
OKLCH	oklch(46.17% 0.13 255.1)
XYZ	xyz(10.1974, 9.7144, 34.1318)
Luminance	0.0972 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B589F #9F621B

analogous

#1B9A9F #1B589F #201B9F

triadic

#1B589F #9F1B58 #589F1B

tetradic

#1B589F #9F1B9A #9F621B #1B9F20

square

#1B589F #9F1B9A #9F621B #1B9F20

split-complementary

#1B589F #9F201B #9A9F1B

monochromatic

#091E36 #123B6B #1B589F #2475D3 #5395E2

Accessibility & contrast

On white

7.14

#1B589F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.94

#1B589F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B589F

7.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B589F	#FFFFFF	#000000	##FFFFFF
##1B589F	1.00	7.14	2.94	7.14
#FFFFFF	7.14	1.00	21.00	1.00
#000000	2.94	21.00	1.00	21.00
##FFFFFF	7.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#335EA2

Deuteranopia (green-blind)

#18529E

Tritanopia (blue-blind)

#006973

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #1b589f;
/* rgb */ color: rgb(27, 88, 159);
/* oklch */ color: oklch(46.2% 0.130 255.1);

Tailwind

colors: {
  custom: {
    50: '#6e86bc',
    500: '#1b589f',
    950: '#000000',
  },
}

SCSS

$custom: #1b589f;
$custom-light: #6e86bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1b589f",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 159
  },
  "hsl": {
    "h": 212.273,
    "s": 70.968,
    "l": 36.471
  },
  "oklch": {
    "l": 0.46165,
    "c": 0.13036,
    "h": 255.1
  },
  "luminance": 0.09716
}

Semantic roles & 50–950 ramp

primary

#1B589F

secondary

#C58F51

accent

#9B3AEE

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#080B12

muted

#7B7C81

Preview Lab

Preview with #1B589F

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

Preview Lab → · Contrast checker → · Palette generator →