#173E7D#173E7D

#173E7D is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.5% C 0.116 H 259.7°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#173E7D
RGB	rgb(23, 62, 125)
HSL	hsl(217, 69%, 29%)
HSV	hsv(217, 82%, 49%)
CMYK	cmyk(81.6%, 50.4%, 0%, 51%)
CIE-LAB	lab(27.04, 11.07, -39.64)
CIE-LCH	lch(27.04, 41.15, 285.60°)
OKLab	oklab(37.46% -0.0207 -0.1139)
OKLCH	oklch(37.46% 0.116 259.7)
XYZ	xyz(5.7763, 5.1074, 20.0795)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173E7D #7D5617

analogous

#17717D #173E7D #23177D

triadic

#173E7D #7D173E #3E7D17

tetradic

#173E7D #7D1771 #7D5617 #177D23

square

#173E7D #7D1771 #7D5617 #177D23

split-complementary

#173E7D #7D2317 #717D17

monochromatic

#050D1A #0D2449 #173E7D #2158B1 #3574DA

Accessibility & contrast

On white

10.39

#173E7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#173E7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173E7D

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173E7D	#FFFFFF	#000000	##FFFFFF
##173E7D	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#19457F

Deuteranopia (green-blind)

#003C7C

Tritanopia (blue-blind)

#004D57

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #173e7d;
/* rgb */ color: rgb(23, 62, 125);
/* oklch */ color: oklch(37.5% 0.116 259.7);

Tailwind

colors: {
  custom: {
    50: '#6672a3',
    500: '#173e7d',
    950: '#000000',
  },
}

SCSS

$custom: #173e7d;
$custom-light: #6672a3;
$custom-dark: #000000;

JSON

{
  "hex": "#173e7d",
  "rgb": {
    "r": 23,
    "g": 62,
    "b": 125
  },
  "hsl": {
    "h": 217.059,
    "s": 68.919,
    "l": 29.02
  },
  "oklch": {
    "l": 0.37456,
    "c": 0.11581,
    "h": 259.7
  },
  "luminance": 0.05108
}

Semantic roles & 50–950 ramp

primary

#173E7D

secondary

#B2863E

accent

#A93CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #173E7D

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

Preview Lab → · Contrast checker → · Palette generator →