#173B7D#173B7D

#173B7D is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.8% C 0.120 H 261.3°. Best body text is #FFFFFF at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#173B7D
RGB	rgb(23, 59, 125)
HSL	hsl(219, 69%, 29%)
HSV	hsv(219, 82%, 49%)
CMYK	cmyk(81.6%, 52.8%, 0%, 51%)
CIE-LAB	lab(26.13, 13.18, -41.10)
CIE-LCH	lch(26.13, 43.17, 287.77°)
OKLab	oklab(36.76% -0.0182 -0.1183)
OKLCH	oklch(36.76% 0.12 261.3)
XYZ	xyz(5.6176, 4.7901, 20.0266)
Luminance	0.0479 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B7D #7D5917

analogous

#176E7D #173B7D #26177D

triadic

#173B7D #7D173B #3B7D17

tetradic

#173B7D #7D176E #7D5917 #177D26

square

#173B7D #7D176E #7D5917 #177D26

split-complementary

#173B7D #7D2617 #6E7D17

monochromatic

#050C1A #0D2349 #173B7D #2153B1 #356FDA

Accessibility & contrast

On white

10.72

#173B7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#173B7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B7D

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B7D	#FFFFFF	#000000	##FFFFFF
##173B7D	1.00	10.72	1.96	10.72
#FFFFFF	10.72	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#10437F

Deuteranopia (green-blind)

#00397C

Tritanopia (blue-blind)

#004B56

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173b7d;
/* rgb */ color: rgb(23, 59, 125);
/* oklch */ color: oklch(36.8% 0.120 261.3);

Tailwind

colors: {
  custom: {
    50: '#6670a3',
    500: '#173b7d',
    950: '#000000',
  },
}

SCSS

$custom: #173b7d;
$custom-light: #6670a3;
$custom-dark: #000000;

JSON

{
  "hex": "#173b7d",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 125
  },
  "hsl": {
    "h": 218.824,
    "s": 68.919,
    "l": 29.02
  },
  "oklch": {
    "l": 0.36759,
    "c": 0.11972,
    "h": 261.3
  },
  "luminance": 0.04791
}

Semantic roles & 50–950 ramp

primary

#173B7D

secondary

#B2893E

accent

#AE3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173B7D

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

Preview Lab → · Contrast checker → · Palette generator →