#17588B#17588B

#17588B is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.7% C 0.105 H 247.2°. Best body text is #FFFFFF at 7.49:1 contrast (WCAG AA passes).

Color values

HEX	#17588B
RGB	rgb(23, 88, 139)
HSL	hsl(206, 72%, 32%)
HSV	hsv(206, 83%, 55%)
CMYK	cmyk(83.5%, 36.7%, 0%, 45.5%)
CIE-LAB	lab(36.03, -0.67, -33.92)
CIE-LCH	lch(36.03, 33.92, 268.88°)
OKLab	oklab(44.74% -0.0406 -0.0966)
OKLCH	oklch(44.74% 0.105 247.2)
XYZ	xyz(8.5015, 9.0246, 25.7150)
Luminance	0.0903 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17588B #8B4A17

analogous

#178B84 #17588B #171E8B

triadic

#17588B #8B1758 #588B17

tetradic

#17588B #84178B #8B4A17 #1E8B17

square

#17588B #84178B #8B4A17 #1E8B17

split-complementary

#17588B #8B171E #8B8417

monochromatic

#061622 #0E3756 #17588B #2079C0 #3D98DF

Accessibility & contrast

On white

7.49

#17588B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.81

#17588B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17588B

7.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17588B	#FFFFFF	#000000	##FFFFFF
##17588B	1.00	7.49	2.81	7.49
#FFFFFF	7.49	1.00	21.00	1.00
#000000	2.81	21.00	1.00	21.00
##FFFFFF	7.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#405A8D

Deuteranopia (green-blind)

#2F508A

Tritanopia (blue-blind)

#00646B

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #17588b;
/* rgb */ color: rgb(23, 88, 139);
/* oklch */ color: oklch(44.7% 0.105 247.2);

Tailwind

colors: {
  custom: {
    50: '#6986ad',
    500: '#17588b',
    950: '#000000',
  },
}

SCSS

$custom: #17588b;
$custom-light: #6986ad;
$custom-dark: #000000;

JSON

{
  "hex": "#17588b",
  "rgb": {
    "r": 23,
    "g": 88,
    "b": 139
  },
  "hsl": {
    "h": 206.379,
    "s": 71.605,
    "l": 31.765
  },
  "oklch": {
    "l": 0.44739,
    "c": 0.10478,
    "h": 247.2
  },
  "luminance": 0.09026
}

Semantic roles & 50–950 ramp

primary

#17588B

secondary

#BF773F

accent

#8939EE

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #17588B

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

Preview Lab → · Contrast checker → · Palette generator →