#173B6F#173B6F

#173B6F is a dark, moderate blue. Relative luminance 0.045; OKLCH L 35.7% C 0.099 H 258.0°. Best body text is #FFFFFF at 11.10:1 contrast (WCAG AA passes).

Color values

HEX	#173B6F
RGB	rgb(23, 59, 111)
HSL	hsl(215, 66%, 26%)
HSV	hsv(215, 79%, 44%)
CMYK	cmyk(79.3%, 46.8%, 0%, 56.5%)
CIE-LAB	lab(25.13, 7.35, -33.84)
CIE-LCH	lch(25.13, 34.63, 282.25°)
OKLab	oklab(35.67% -0.0206 -0.097)
OKLCH	oklch(35.67% 0.099 258)
XYZ	xyz(4.7855, 4.4572, 15.6440)
Luminance	0.0446 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B6F #6F4B17

analogous

#17676F #173B6F #1F176F

triadic

#173B6F #6F173B #3B6F17

tetradic

#173B6F #6F1767 #6F4B17 #176F1F

square

#173B6F #6F1767 #6F4B17 #176F1F

split-complementary

#173B6F #6F1F17 #676F17

monochromatic

#050D19 #0C203C #173B6F #2256A2 #2D71D3

Accessibility & contrast

On white

11.10

#173B6F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#173B6F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B6F

11.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B6F	#FFFFFF	#000000	##FFFFFF
##173B6F	1.00	11.10	1.89	11.10
#FFFFFF	11.10	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204071

Deuteranopia (green-blind)

#0E386E

Tritanopia (blue-blind)

#00474F

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #173b6f;
/* rgb */ color: rgb(23, 59, 111);
/* oklch */ color: oklch(35.7% 0.099 258.0);

Tailwind

colors: {
  custom: {
    50: '#627099',
    500: '#173b6f',
    950: '#000000',
  },
}

SCSS

$custom: #173b6f;
$custom-light: #627099;
$custom-dark: #000000;

JSON

{
  "hex": "#173b6f",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 111
  },
  "hsl": {
    "h": 215.455,
    "s": 65.672,
    "l": 26.275
  },
  "oklch": {
    "l": 0.35671,
    "c": 0.09912,
    "h": 258
  },
  "luminance": 0.04458
}

Semantic roles & 50–950 ramp

primary

#173B6F

secondary

#A57A3D

accent

#A33FE9

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173B6F

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

Preview Lab → · Contrast checker → · Palette generator →