#17537B#17537B

#17537B is a dark, moderate cyan. Relative luminance 0.078; OKLCH L 42.5% C 0.089 H 242.8°. Best body text is #FFFFFF at 8.20:1 contrast (WCAG AA passes).

Color values

HEX	#17537B
RGB	rgb(23, 83, 123)
HSL	hsl(204, 68%, 29%)
HSV	hsv(204, 81%, 48%)
CMYK	cmyk(81.3%, 32.5%, 0%, 51.8%)
CIE-LAB	lab(33.56, -3.83, -28.00)
CIE-LCH	lch(33.56, 28.26, 262.22°)
OKLab	oklab(42.5% -0.0407 -0.0794)
OKLCH	oklch(42.5% 0.089 242.8)
XYZ	xyz(7.0204, 7.7979, 19.8702)
Luminance	0.0780 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17537B #7B3F17

analogous

#177B71 #17537B #17217B

triadic

#17537B #7B1753 #537B17

tetradic

#17537B #71177B #7B3F17 #217B17

square

#17537B #71177B #7B3F17 #217B17

split-complementary

#17537B #7B1721 #7B7117

monochromatic

#05111A #0D3047 #17537B #2176AF #3397D9

Accessibility & contrast

On white

8.20

#17537B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.56

#17537B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17537B

8.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17537B	#FFFFFF	#000000	##FFFFFF
##17537B	1.00	8.20	2.56	8.20
#FFFFFF	8.20	1.00	21.00	1.00
#000000	2.56	21.00	1.00	21.00
##FFFFFF	8.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#40547D

Deuteranopia (green-blind)

#324B7A

Tritanopia (blue-blind)

#005D61

Achromatopsia (no color)

#4F4F4F

Design tokens & code

CSS

--color: #17537b;
/* rgb */ color: rgb(23, 83, 123);
/* oklch */ color: oklch(42.5% 0.089 242.8);

Tailwind

colors: {
  custom: {
    50: '#6583a1',
    500: '#17537b',
    950: '#000000',
  },
}

SCSS

$custom: #17537b;
$custom-light: #6583a1;
$custom-dark: #000000;

JSON

{
  "hex": "#17537b",
  "rgb": {
    "r": 23,
    "g": 83,
    "b": 123
  },
  "hsl": {
    "h": 204,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.42502,
    "c": 0.08925,
    "h": 242.8
  },
  "luminance": 0.07799
}

Semantic roles & 50–950 ramp

primary

#17537B

secondary

#B06B3E

accent

#823CEB

background

#F6F7F9

surface

#EBEEF2

border

#C6C9CC

text

#060A0F

muted

#7A7C7E

Preview Lab

Preview with #17537B

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

Preview Lab → · Contrast checker → · Palette generator →