#1B599D#1B599D

#1B599D is a mid, vivid cyan. Relative luminance 0.098; OKLCH L 46.3% C 0.126 H 254.0°. Best body text is #FFFFFF at 7.09:1 contrast (WCAG AA passes).

Color values

HEX	#1B599D
RGB	rgb(27, 89, 157)
HSL	hsl(211, 71%, 36%)
HSV	hsv(211, 83%, 62%)
CMYK	cmyk(82.8%, 43.3%, 0%, 38.4%)
CIE-LAB	lab(37.50, 6.28, -42.44)
CIE-LCH	lch(37.50, 42.90, 278.42°)
OKLab	oklab(46.26% -0.0349 -0.1216)
OKLCH	oklch(46.26% 0.126 254)
XYZ	xyz(10.1079, 9.8108, 33.2527)
Luminance	0.0981 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B599D #9D5F1B

analogous

#1B9A9D #1B599D #1E1B9D

triadic

#1B599D #9D1B59 #599D1B

tetradic

#1B599D #9D1B9A #9D5F1B #1B9D1E

square

#1B599D #9D1B9A #9D5F1B #1B9D1E

split-complementary

#1B599D #9D1E1B #9A9D1B

monochromatic

#091E35 #123B69 #1B599D #2477D1 #5196E1

Accessibility & contrast

On white

7.09

#1B599D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.96

#1B599D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B599D

7.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B599D	#FFFFFF	#000000	##FFFFFF
##1B599D	1.00	7.09	2.96	7.09
#FFFFFF	7.09	1.00	21.00	1.00
#000000	2.96	21.00	1.00	21.00
##FFFFFF	7.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#375FA0

Deuteranopia (green-blind)

#1E539C

Tritanopia (blue-blind)

#006973

Achromatopsia (no color)

#585858

Design tokens & code

CSS

--color: #1b599d;
/* rgb */ color: rgb(27, 89, 157);
/* oklch */ color: oklch(46.3% 0.126 254.0);

Tailwind

colors: {
  custom: {
    50: '#6e87ba',
    500: '#1b599d',
    950: '#000000',
  },
}

SCSS

$custom: #1b599d;
$custom-light: #6e87ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1b599d",
  "rgb": {
    "r": 27,
    "g": 89,
    "b": 157
  },
  "hsl": {
    "h": 211.385,
    "s": 70.652,
    "l": 36.078
  },
  "oklch": {
    "l": 0.46261,
    "c": 0.12649,
    "h": 254
  },
  "luminance": 0.09812
}

Semantic roles & 50–950 ramp

primary

#1B599D

secondary

#C48D50

accent

#983AED

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#080B12

muted

#7B7C81

Preview Lab

Preview with #1B599D

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

Preview Lab → · Contrast checker → · Palette generator →