#173A5D#173A5D

#173A5D is a dark, moderate cyan. Relative luminance 0.040; OKLCH L 34.2% C 0.074 H 250.9°. Best body text is #FFFFFF at 11.67:1 contrast (WCAG AA passes).

Color values

HEX	#173A5D
RGB	rgb(23, 58, 93)
HSL	hsl(210, 60%, 23%)
HSV	hsv(210, 75%, 36%)
CMYK	cmyk(75.3%, 37.6%, 0%, 63.5%)
CIE-LAB	lab(23.67, 0.62, -24.54)
CIE-LCH	lch(23.67, 24.55, 271.44°)
OKLab	oklab(34.16% -0.0242 -0.0697)
OKLCH	oklch(34.16% 0.074 250.9)
XYZ	xyz(3.8415, 3.9982, 10.9231)
Luminance	0.0400 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A5D #5D3A17

analogous

#175D5D #173A5D #17175D

triadic

#173A5D #5D173A #3A5D17

tetradic

#173A5D #5D175D #5D3A17 #175D17

square

#173A5D #5D175D #5D3A17 #175D17

split-complementary

#173A5D #5D1717 #5D5D17

monochromatic

#060F19 #0B1B2C #173A5D #23598E #2F77BF

Accessibility & contrast

On white

11.67

#173A5D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#173A5D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A5D

11.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A5D	#FFFFFF	#000000	##FFFFFF
##173A5D	1.00	11.67	1.80	11.67
#FFFFFF	11.67	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3C5E

Deuteranopia (green-blind)

#20355C

Tritanopia (blue-blind)

#004247

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #173a5d;
/* rgb */ color: rgb(23, 58, 93);
/* oklch */ color: oklch(34.2% 0.074 250.9);

Tailwind

colors: {
  custom: {
    50: '#5e6f8b',
    500: '#173a5d',
    950: '#000000',
  },
}

SCSS

$custom: #173a5d;
$custom-light: #5e6f8b;
$custom-dark: #000000;

JSON

{
  "hex": "#173a5d",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 93
  },
  "hsl": {
    "h": 210,
    "s": 60.345,
    "l": 22.745
  },
  "oklch": {
    "l": 0.34163,
    "c": 0.07377,
    "h": 250.9
  },
  "luminance": 0.03999
}

Semantic roles & 50–950 ramp

primary

#173A5D

secondary

#94683C

accent

#9444E3

background

#F5F6F8

surface

#E9ECF0

border

#C5C7CB

text

#05070C

muted

#797A7D

Preview Lab

Preview with #173A5D

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

Preview Lab → · Contrast checker → · Palette generator →