#173B6E#173B6E

#173B6E is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.6% C 0.098 H 257.7°. Best body text is #FFFFFF at 11.13:1 contrast (WCAG AA passes).

Color values

HEX	#173B6E
RGB	rgb(23, 59, 110)
HSL	hsl(215, 65%, 26%)
HSV	hsv(215, 79%, 43%)
CMYK	cmyk(79.1%, 46.4%, 0%, 56.9%)
CIE-LAB	lab(25.06, 6.93, -33.31)
CIE-LCH	lch(25.06, 34.02, 281.76°)
OKLab	oklab(35.6% -0.0208 -0.0954)
OKLCH	oklch(35.6% 0.098 257.7)
XYZ	xyz(4.7308, 4.4353, 15.3556)
Luminance	0.0444 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B6E #6E4A17

analogous

#17666E #173B6E #1E176E

triadic

#173B6E #6E173B #3B6E17

tetradic

#173B6E #6E1766 #6E4A17 #176E1E

square

#173B6E #6E1766 #6E4A17 #176E1E

split-complementary

#173B6E #6E1E17 #666E17

monochromatic

#050E19 #0C203B #173B6E #2256A1 #2C71D3

Accessibility & contrast

On white

11.13

#173B6E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#173B6E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B6E

11.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B6E	#FFFFFF	#000000	##FFFFFF
##173B6E	1.00	11.13	1.89	11.13
#FFFFFF	11.13	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214070

Deuteranopia (green-blind)

#10386D

Tritanopia (blue-blind)

#00474F

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173b6e;
/* rgb */ color: rgb(23, 59, 110);
/* oklch */ color: oklch(35.6% 0.098 257.7);

Tailwind

colors: {
  custom: {
    50: '#627098',
    500: '#173b6e',
    950: '#000000',
  },
}

SCSS

$custom: #173b6e;
$custom-light: #627098;
$custom-dark: #000000;

JSON

{
  "hex": "#173b6e",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 110
  },
  "hsl": {
    "h": 215.172,
    "s": 65.414,
    "l": 26.078
  },
  "oklch": {
    "l": 0.35597,
    "c": 0.09763,
    "h": 257.7
  },
  "luminance": 0.04436
}

Semantic roles & 50–950 ramp

primary

#173B6E

secondary

#A4793D

accent

#A23FE8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #173B6E

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

Preview Lab → · Contrast checker → · Palette generator →