#17578F#17578F

#17578F is a dark, moderate cyan. Relative luminance 0.090; OKLCH L 44.7% C 0.111 H 249.7°. Best body text is #FFFFFF at 7.51:1 contrast (WCAG AA passes).

Color values

HEX	#17578F
RGB	rgb(23, 87, 143)
HSL	hsl(208, 72%, 33%)
HSV	hsv(208, 84%, 56%)
CMYK	cmyk(83.9%, 39.2%, 0%, 43.9%)
CIE-LAB	lab(35.95, 1.58, -36.48)
CIE-LCH	lch(35.95, 36.52, 272.48°)
OKLab	oklab(44.75% -0.0385 -0.1042)
OKLCH	oklch(44.75% 0.111 249.7)
XYZ	xyz(8.7176, 8.9806, 27.2553)
Luminance	0.0898 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17578F #8F4F17

analogous

#178F8B #17578F #171B8F

triadic

#17578F #8F1757 #578F17

tetradic

#17578F #8B178F #8F4F17 #1B8F17

square

#17578F #8B178F #8F4F17 #1B8F17

split-complementary

#17578F #8F171B #8F8B17

monochromatic

#061726 #0F375A #17578F #1F77C4 #4096E0

Accessibility & contrast

On white

7.51

#17578F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.80

#17578F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17578F

7.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17578F	#FFFFFF	#000000	##FFFFFF
##17578F	1.00	7.51	2.80	7.51
#FFFFFF	7.51	1.00	21.00	1.00
#000000	2.80	21.00	1.00	21.00
##FFFFFF	7.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C5A91

Deuteranopia (green-blind)

#29508E

Tritanopia (blue-blind)

#00646C

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #17578f;
/* rgb */ color: rgb(23, 87, 143);
/* oklch */ color: oklch(44.7% 0.111 249.7);

Tailwind

colors: {
  custom: {
    50: '#6a86b0',
    500: '#17578f',
    950: '#000000',
  },
}

SCSS

$custom: #17578f;
$custom-light: #6a86b0;
$custom-dark: #000000;

JSON

{
  "hex": "#17578f",
  "rgb": {
    "r": 23,
    "g": 87,
    "b": 143
  },
  "hsl": {
    "h": 208,
    "s": 72.289,
    "l": 32.549
  },
  "oklch": {
    "l": 0.44747,
    "c": 0.11106,
    "h": 249.7
  },
  "luminance": 0.08982
}

Semantic roles & 50–950 ramp

primary

#17578F

secondary

#C17D41

accent

#8E39EF

background

#F6F8FA

surface

#ECEFF5

border

#C7CACF

text

#070B10

muted

#7A7C7F

Preview Lab

Preview with #17578F

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

Preview Lab → · Contrast checker → · Palette generator →