#173C7C#173C7C

#173C7C is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.9% C 0.117 H 260.6°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#173C7C
RGB	rgb(23, 60, 124)
HSL	hsl(218, 69%, 29%)
HSV	hsv(218, 81%, 49%)
CMYK	cmyk(81.5%, 51.6%, 0%, 51.4%)
CIE-LAB	lab(26.36, 12.06, -40.11)
CIE-LCH	lch(26.36, 41.88, 286.73°)
OKLab	oklab(36.91% -0.0192 -0.1154)
OKLCH	oklch(36.91% 0.117 260.6)
XYZ	xyz(5.6060, 4.8685, 19.7091)
Luminance	0.0487 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C7C #7C5717

analogous

#176F7C #173C7C #25177C

triadic

#173C7C #7C173C #3C7C17

tetradic

#173C7C #7C176F #7C5717 #177C25

square

#173C7C #7C176F #7C5717 #177C25

split-complementary

#173C7C #7C2517 #6F7C17

monochromatic

#050C1A #0D2348 #173C7C #2155B0 #3471D9

Accessibility & contrast

On white

10.64

#173C7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#173C7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C7C

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C7C	#FFFFFF	#000000	##FFFFFF
##173C7C	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#15437E

Deuteranopia (green-blind)

#003A7B

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173c7c;
/* rgb */ color: rgb(23, 60, 124);
/* oklch */ color: oklch(36.9% 0.117 260.6);

Tailwind

colors: {
  custom: {
    50: '#6571a2',
    500: '#173c7c',
    950: '#000000',
  },
}

SCSS

$custom: #173c7c;
$custom-light: #6571a2;
$custom-dark: #000000;

JSON

{
  "hex": "#173c7c",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 124
  },
  "hsl": {
    "h": 218.02,
    "s": 68.707,
    "l": 28.824
  },
  "oklch": {
    "l": 0.3691,
    "c": 0.11696,
    "h": 260.6
  },
  "luminance": 0.04869
}

Semantic roles & 50–950 ramp

primary

#173C7C

secondary

#B1873E

accent

#AB3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173C7C

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

Preview Lab → · Contrast checker → · Palette generator →