#173C7E#173C7E

#173C7E is a dark, moderate blue. Relative luminance 0.049; OKLCH L 37.1% C 0.120 H 260.9°. Best body text is #FFFFFF at 10.58:1 contrast (WCAG AA passes).

Color values

HEX	#173C7E
RGB	rgb(23, 60, 126)
HSL	hsl(218, 69%, 29%)
HSV	hsv(218, 82%, 49%)
CMYK	cmyk(81.7%, 52.4%, 0%, 50.6%)
CIE-LAB	lab(26.50, 12.89, -41.13)
CIE-LCH	lch(26.50, 43.10, 287.40°)
OKLab	oklab(37.07% -0.0189 -0.1184)
OKLCH	oklch(37.07% 0.12 260.9)
XYZ	xyz(5.7337, 4.9196, 20.3820)
Luminance	0.0492 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C7E #7E5917

analogous

#17707E #173C7E #26177E

triadic

#173C7E #7E173C #3C7E17

tetradic

#173C7E #7E1770 #7E5917 #177E26

square

#173C7E #7E1770 #7E5917 #177E26

split-complementary

#173C7E #7E2617 #707E17

monochromatic

#050C1A #0E234A #173C7E #2055B2 #3570DA

Accessibility & contrast

On white

10.58

#173C7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#173C7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C7E

10.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C7E	#FFFFFF	#000000	##FFFFFF
##173C7E	1.00	10.58	1.98	10.58
#FFFFFF	10.58	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#124480

Deuteranopia (green-blind)

#003A7D

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173c7e;
/* rgb */ color: rgb(23, 60, 126);
/* oklch */ color: oklch(37.1% 0.120 260.9);

Tailwind

colors: {
  custom: {
    50: '#6671a4',
    500: '#173c7e',
    950: '#000000',
  },
}

SCSS

$custom: #173c7e;
$custom-light: #6671a4;
$custom-dark: #000000;

JSON

{
  "hex": "#173c7e",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 126
  },
  "hsl": {
    "h": 218.447,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.3707,
    "c": 0.11987,
    "h": 260.9
  },
  "luminance": 0.0492
}

Semantic roles & 50–950 ramp

primary

#173C7E

secondary

#B3893E

accent

#AD3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173C7E

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

Preview Lab → · Contrast checker → · Palette generator →