#17304B#17304B

#17304B is a dark, muted cyan. Relative luminance 0.028; OKLCH L 30.4% C 0.058 H 251.9°. Best body text is #FFFFFF at 13.45:1 contrast (WCAG AA passes).

Color values

HEX	#17304B
RGB	rgb(23, 48, 75)
HSL	hsl(211, 53%, 19%)
HSV	hsv(211, 69%, 29%)
CMYK	cmyk(69.3%, 36%, 0%, 70.6%)
CIE-LAB	lab(19.24, 0.28, -19.57)
CIE-LCH	lch(19.24, 19.57, 270.83°)
OKLab	oklab(30.35% -0.0181 -0.0553)
OKLCH	oklch(30.35% 0.058 251.9)
XYZ	xyz(2.6798, 2.8038, 7.0552)
Luminance	0.0280 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17304B #4B3217

analogous

#174A4B #17304B #18174B

triadic

#17304B #4B1730 #304B17

tetradic

#17304B #4B174A #4B3217 #174B18

square

#17304B #4B174A #4B3217 #174B18

split-complementary

#17304B #4B1817 #4A4B17

monochromatic

#070F17 #09121C #17304B #254E7A #346CA9

Accessibility & contrast

On white

13.45

#17304B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#17304B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17304B

13.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17304B	#FFFFFF	#000000	##FFFFFF
##17304B	1.00	13.45	1.56	13.45
#FFFFFF	13.45	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#24314C

Deuteranopia (green-blind)

#1D2C4A

Tritanopia (blue-blind)

#00363A

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #17304b;
/* rgb */ color: rgb(23, 48, 75);
/* oklch */ color: oklch(30.4% 0.058 251.9);

Tailwind

colors: {
  custom: {
    50: '#5a687d',
    500: '#17304b',
    950: '#000000',
  },
}

SCSS

$custom: #17304b;
$custom-light: #5a687d;
$custom-dark: #000000;

JSON

{
  "hex": "#17304b",
  "rgb": {
    "r": 23,
    "g": 48,
    "b": 75
  },
  "hsl": {
    "h": 211.154,
    "s": 53.061,
    "l": 19.216
  },
  "oklch": {
    "l": 0.30351,
    "c": 0.05821,
    "h": 251.9
  },
  "luminance": 0.02804
}

Semantic roles & 50–950 ramp

primary

#17304B

secondary

#82603C

accent

#974BDC

background

#F5F6F7

surface

#E9EBEE

border

#C5C6C9

text

#040609

muted

#797A7B

Preview Lab

Preview with #17304B

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

Preview Lab → · Contrast checker → · Palette generator →