#173A6D#173A6D

#173A6D is a dark, moderate blue. Relative luminance 0.043; OKLCH L 35.3% C 0.097 H 258.1°. Best body text is #FFFFFF at 11.28:1 contrast (WCAG AA passes).

Color values

HEX	#173A6D
RGB	rgb(23, 58, 109)
HSL	hsl(216, 65%, 26%)
HSV	hsv(216, 79%, 43%)
CMYK	cmyk(78.9%, 46.8%, 0%, 57.3%)
CIE-LAB	lab(24.68, 7.22, -33.28)
CIE-LCH	lch(24.68, 34.06, 282.24°)
OKLab	oklab(35.28% -0.0201 -0.0953)
OKLCH	oklch(35.28% 0.097 258.1)
XYZ	xyz(4.6257, 4.3119, 15.0535)
Luminance	0.0431 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173A6D #6D4A17

analogous

#17656D #173A6D #1F176D

triadic

#173A6D #6D173A #3A6D17

tetradic

#173A6D #6D1765 #6D4A17 #176D1F

square

#173A6D #6D1765 #6D4A17 #176D1F

split-complementary

#173A6D #6D1F17 #656D17

monochromatic

#050D19 #0C1F3A #173A6D #2255A0 #2C70D2

Accessibility & contrast

On white

11.28

#173A6D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#173A6D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173A6D

11.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173A6D	#FFFFFF	#000000	##FFFFFF
##173A6D	1.00	11.28	1.86	11.28
#FFFFFF	11.28	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#203F6F

Deuteranopia (green-blind)

#0F376C

Tritanopia (blue-blind)

#00464E

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #173a6d;
/* rgb */ color: rgb(23, 58, 109);
/* oklch */ color: oklch(35.3% 0.097 258.1);

Tailwind

colors: {
  custom: {
    50: '#626f97',
    500: '#173a6d',
    950: '#000000',
  },
}

SCSS

$custom: #173a6d;
$custom-light: #626f97;
$custom-dark: #000000;

JSON

{
  "hex": "#173a6d",
  "rgb": {
    "r": 23,
    "g": 58,
    "b": 109
  },
  "hsl": {
    "h": 215.581,
    "s": 65.152,
    "l": 25.882
  },
  "oklch": {
    "l": 0.35278,
    "c": 0.09743,
    "h": 258.1
  },
  "luminance": 0.04312
}

Semantic roles & 50–950 ramp

primary

#173A6D

secondary

#A3793D

accent

#A440E8

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #173A6D

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

Preview Lab → · Contrast checker → · Palette generator →