#17557B#17557B

#17557B is a dark, moderate cyan. Relative luminance 0.081; OKLCH L 43.0% C 0.088 H 240.8°. Best body text is #FFFFFF at 8.01:1 contrast (WCAG AA passes).

Color values

HEX	#17557B
RGB	rgb(23, 85, 123)
HSL	hsl(203, 68%, 29%)
HSV	hsv(203, 81%, 48%)
CMYK	cmyk(81.3%, 30.9%, 0%, 51.8%)
CIE-LAB	lab(34.21, -5.09, -26.98)
CIE-LCH	lch(34.21, 27.45, 259.31°)
OKLab	oklab(43.02% -0.0428 -0.0764)
OKLCH	oklch(43.02% 0.088 240.8)
XYZ	xyz(7.1756, 8.1084, 19.9219)
Luminance	0.0811 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17557B #7B3D17

analogous

#177B6F #17557B #17237B

triadic

#17557B #7B1755 #557B17

tetradic

#17557B #6F177B #7B3D17 #237B17

square

#17557B #6F177B #7B3D17 #237B17

split-complementary

#17557B #7B1723 #7B6F17

monochromatic

#05121A #0D3147 #17557B #2179AF #339AD9

Accessibility & contrast

On white

8.01

#17557B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.62

#17557B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17557B

8.01:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17557B	#FFFFFF	#000000	##FFFFFF
##17557B	1.00	8.01	2.62	8.01
#FFFFFF	8.01	1.00	21.00	1.00
#000000	2.62	21.00	1.00	21.00
##FFFFFF	8.01	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#43567D

Deuteranopia (green-blind)

#354C7A

Tritanopia (blue-blind)

#005E62

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #17557b;
/* rgb */ color: rgb(23, 85, 123);
/* oklch */ color: oklch(43.0% 0.088 240.8);

Tailwind

colors: {
  custom: {
    50: '#6584a1',
    500: '#17557b',
    950: '#000000',
  },
}

SCSS

$custom: #17557b;
$custom-light: #6584a1;
$custom-dark: #000000;

JSON

{
  "hex": "#17557b",
  "rgb": {
    "r": 23,
    "g": 85,
    "b": 123
  },
  "hsl": {
    "h": 202.8,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.43016,
    "c": 0.08755,
    "h": 240.8
  },
  "luminance": 0.08109
}

Semantic roles & 50–950 ramp

primary

#17557B

secondary

#B0693E

accent

#7F3CEB

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#060B0F

muted

#7A7C7E

Preview Lab

Preview with #17557B

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

Preview Lab → · Contrast checker → · Palette generator →