#173E7B#173E7B

#173E7B is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.3% C 0.113 H 259.3°. Best body text is #FFFFFF at 10.44:1 contrast (WCAG AA passes).

Color values

HEX	#173E7B
RGB	rgb(23, 62, 123)
HSL	hsl(217, 68%, 29%)
HSV	hsv(217, 81%, 48%)
CMYK	cmyk(81.3%, 49.6%, 0%, 51.8%)
CIE-LAB	lab(26.90, 10.24, -38.61)
CIE-LCH	lch(26.90, 39.94, 284.85°)
OKLab	oklab(37.3% -0.021 -0.1109)
OKLCH	oklch(37.3% 0.113 259.3)
XYZ	xyz(5.6498, 5.0568, 19.4133)
Luminance	0.0506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E7B #7B5417

analogous

#17707B #173E7B #22177B

triadic

#173E7B #7B173E #3E7B17

tetradic

#173E7B #7B1770 #7B5417 #177B22

square

#173E7B #7B1770 #7B5417 #177B22

split-complementary

#173E7B #7B2217 #707B17

monochromatic

#050D1A #0D2447 #173E7B #2158AF #3374D9

Accessibility & contrast

On white

10.44

#173E7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#173E7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E7B

10.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E7B	#FFFFFF	#000000	##FFFFFF
##173E7B	1.00	10.44	2.01	10.44
#FFFFFF	10.44	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C447D

Deuteranopia (green-blind)

#003B7A

Tritanopia (blue-blind)

#004D56

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173e7b;
/* rgb */ color: rgb(23, 62, 123);
/* oklch */ color: oklch(37.3% 0.113 259.3);

Tailwind

colors: {
  custom: {
    50: '#6572a2',
    500: '#173e7b',
    950: '#000000',
  },
}

SCSS

$custom: #173e7b;
$custom-light: #6572a2;
$custom-dark: #000000;

JSON

{
  "hex": "#173e7b",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 123
  },
  "hsl": {
    "h": 216.6,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.37301,
    "c": 0.1129,
    "h": 259.3
  },
  "luminance": 0.05057
}

Semantic roles & 50–950 ramp

primary

#173E7B

secondary

#B0833E

accent

#A73CEB

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#06080F

muted

#7A7B7F

Preview Lab

Preview with #173E7B

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

Preview Lab → · Contrast checker → · Palette generator →