#173A6B#173A6B

#173A6B is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.1% C 0.094 H 257.5°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX	#173A6B
RGB	rgb(23, 58, 107)
HSL	hsl(215, 65%, 25%)
HSV	hsv(215, 79%, 42%)
CMYK	cmyk(78.5%, 45.8%, 0%, 58%)
CIE-LAB	lab(24.54, 6.39, -32.22)
CIE-LCH	lch(24.54, 32.84, 281.22°)
OKLab	oklab(35.13% -0.0205 -0.0922)
OKLCH	oklch(35.13% 0.094 257.5)
XYZ	xyz(4.5193, 4.2693, 14.4929)
Luminance	0.0427 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A6B #6B4817

analogous

#17646B #173A6B #1E176B

triadic

#173A6B #6B173A #3A6B17

tetradic

#173A6B #6B1764 #6B4817 #176B1E

square

#173A6B #6B1764 #6B4817 #176B1E

split-complementary

#173A6B #6B1E17 #646B17

monochromatic

#050E19 #0C1F39 #173A6B #22559D #2D71D0

Accessibility & contrast

On white

11.33

#173A6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#173A6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A6B

11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A6B	#FFFFFF	#000000	##FFFFFF
##173A6B	1.00	11.33	1.85	11.33
#FFFFFF	11.33	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#223E6D

Deuteranopia (green-blind)

#12376A

Tritanopia (blue-blind)

#00464D

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #173a6b;
/* rgb */ color: rgb(23, 58, 107);
/* oklch */ color: oklch(35.1% 0.094 257.5);

Tailwind

colors: {
  custom: {
    50: '#616f96',
    500: '#173a6b',
    950: '#000000',
  },
}

SCSS

$custom: #173a6b;
$custom-light: #616f96;
$custom-dark: #000000;

JSON

{
  "hex": "#173a6b",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 107
  },
  "hsl": {
    "h": 215,
    "s": 64.615,
    "l": 25.49
  },
  "oklch": {
    "l": 0.35131,
    "c": 0.09445,
    "h": 257.5
  },
  "luminance": 0.0427
}

Semantic roles & 50–950 ramp

primary

#173A6B

secondary

#A1773D

accent

#A240E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #173A6B

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

Preview Lab → · Contrast checker → · Palette generator →