#173C7B#173C7B

#173C7B is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.8% C 0.116 H 260.4°. Best body text is #FFFFFF at 10.67:1 contrast (WCAG AA passes).

Color values

HEX	#173C7B
RGB	rgb(23, 60, 123)
HSL	hsl(218, 68%, 29%)
HSV	hsv(218, 81%, 48%)
CMYK	cmyk(81.3%, 51.2%, 0%, 51.8%)
CIE-LAB	lab(26.28, 11.64, -39.60)
CIE-LCH	lch(26.28, 41.27, 286.38°)
OKLab	oklab(36.83% -0.0193 -0.1139)
OKLCH	oklch(36.83% 0.116 260.4)
XYZ	xyz(5.5431, 4.8433, 19.3778)
Luminance	0.0484 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173C7B #7B5617

analogous

#176E7B #173C7B #24177B

triadic

#173C7B #7B173C #3C7B17

tetradic

#173C7B #7B176E #7B5617 #177B24

square

#173C7B #7B176E #7B5617 #177B24

split-complementary

#173C7B #7B2417 #6E7B17

monochromatic

#050D1A #0D2347 #173C7B #2155AF #3371D9

Accessibility & contrast

On white

10.67

#173C7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#173C7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173C7B

10.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173C7B	#FFFFFF	#000000	##FFFFFF
##173C7B	1.00	10.67	1.97	10.67
#FFFFFF	10.67	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16437D

Deuteranopia (green-blind)

#003A7A

Tritanopia (blue-blind)

#004B55

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173c7b;
/* rgb */ color: rgb(23, 60, 123);
/* oklch */ color: oklch(36.8% 0.116 260.4);

Tailwind

colors: {
  custom: {
    50: '#6571a2',
    500: '#173c7b',
    950: '#000000',
  },
}

SCSS

$custom: #173c7b;
$custom-light: #6571a2;
$custom-dark: #000000;

JSON

{
  "hex": "#173c7b",
  "rgb": {
    "r": 23,
    "g": 60,
    "b": 123
  },
  "hsl": {
    "h": 217.8,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.3683,
    "c": 0.1155,
    "h": 260.4
  },
  "luminance": 0.04844
}

Semantic roles & 50–950 ramp

primary

#173C7B

secondary

#B0863E

accent

#AB3CEB

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#06070F

muted

#7A7A7F

Preview Lab

Preview with #173C7B

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

Preview Lab → · Contrast checker → · Palette generator →