#1B588A#1B588A

#1B588A is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.8% C 0.102 H 247.7°. Best body text is #FFFFFF at 7.47:1 contrast (WCAG AA passes).

Color values

HEX	#1B588A
RGB	rgb(27, 88, 138)
HSL	hsl(207, 67%, 32%)
HSV	hsv(207, 80%, 54%)
CMYK	cmyk(80.4%, 36.2%, 0%, 45.9%)
CIE-LAB	lab(36.07, -0.62, -33.23)
CIE-LCH	lch(36.07, 33.24, 268.93°)
OKLab	oklab(44.78% -0.0389 -0.0946)
OKLCH	oklch(44.78% 0.102 247.7)
XYZ	xyz(8.5274, 9.0464, 25.3365)
Luminance	0.0905 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B588A #8A4D1B

analogous

#1B8A85 #1B588A #1B208A

triadic

#1B588A #8A1B58 #588A1B

tetradic

#1B588A #851B8A #8A4D1B #208A1B

square

#1B588A #851B8A #8A4D1B #208A1B

split-complementary

#1B588A #8A1B20 #8A851B

monochromatic

#071724 #113757 #1B588A #2579BD #4597DB

Accessibility & contrast

On white

7.47

#1B588A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#1B588A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B588A

7.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B588A	#FFFFFF	#000000	##FFFFFF
##1B588A	1.00	7.47	2.81	7.47
#FFFFFF	7.47	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#415A8C

Deuteranopia (green-blind)

#305089

Tritanopia (blue-blind)

#00646A

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1b588a;
/* rgb */ color: rgb(27, 88, 138);
/* oklch */ color: oklch(44.8% 0.102 247.7);

Tailwind

colors: {
  custom: {
    50: '#6a86ac',
    500: '#1b588a',
    950: '#000000',
  },
}

SCSS

$custom: #1b588a;
$custom-light: #6a86ac;
$custom-dark: #000000;

JSON

{
  "hex": "#1b588a",
  "rgb": {
    "r": 27,
    "g": 88,
    "b": 138
  },
  "hsl": {
    "h": 207.027,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.44781,
    "c": 0.10226,
    "h": 247.7
  },
  "luminance": 0.09047
}

Semantic roles & 50–950 ramp

primary

#1B588A

secondary

#BC7A45

accent

#8B3EEA

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #1B588A

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

Preview Lab → · Contrast checker → · Palette generator →