#17303B#17303B

#17303B is a dark, muted cyan. Relative luminance 0.026; OKLCH L 29.4% C 0.037 H 228.5°. Best body text is #FFFFFF at 13.79:1 contrast (WCAG AA passes).

Color values

HEX	#17303B
RGB	rgb(23, 48, 59)
HSL	hsl(198, 44%, 16%)
HSV	hsv(198, 61%, 23%)
CMYK	cmyk(61%, 18.6%, 0%, 76.9%)
CIE-LAB	lab(18.42, -5.86, -9.94)
CIE-LCH	lch(18.42, 11.54, 239.46°)
OKLab	oklab(29.43% -0.0244 -0.0276)
OKLCH	oklch(29.43% 0.037 228.5)
XYZ	xyz(2.1994, 2.6116, 4.5250)
Luminance	0.0261 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#17303B #3B2217

analogous

#173B34 #17303B #171E3B

triadic

#17303B #3B1730 #303B17

tetradic

#17303B #34173B #3B2217 #1E3B17

square

#17303B #34173B #3B2217 #1E3B17

split-complementary

#17303B #3B171E #3B3417

monochromatic

#091216 #091216 #17303B #285467 #397893

Accessibility & contrast

On white

13.79

#17303B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#17303B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #17303B

13.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##17303B	#FFFFFF	#000000	##FFFFFF
##17303B	1.00	13.79	1.52	13.79
#FFFFFF	13.79	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A2F3C

Deuteranopia (green-blind)

#252B3B

Tritanopia (blue-blind)

#023334

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #17303b;
/* rgb */ color: rgb(23, 48, 59);
/* oklch */ color: oklch(29.4% 0.037 228.5);

Tailwind

colors: {
  custom: {
    50: '#576871',
    500: '#17303b',
    950: '#000000',
  },
}

SCSS

$custom: #17303b;
$custom-light: #576871;
$custom-dark: #000000;

JSON

{
  "hex": "#17303b",
  "rgb": {
    "r": 23,
    "g": 48,
    "b": 59
  },
  "hsl": {
    "h": 198.333,
    "s": 43.902,
    "l": 16.078
  },
  "oklch": {
    "l": 0.29429,
    "c": 0.03687,
    "h": 228.5
  },
  "luminance": 0.02612
}

Semantic roles & 50–950 ramp

primary

#17303B

secondary

#724D3C

accent

#7B54D4

background

#F5F6F6

surface

#E9EBEC

border

#C5C6C7

text

#030607

muted

#787A7A

Preview Lab

Preview with #17303B

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

Preview Lab → · Contrast checker → · Palette generator →