#173D7E#173D7E

#173D7E is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.3% C 0.119 H 260.4°. Best body text is #FFFFFF at 10.47:1 contrast (WCAG AA passes).

Color values

HEX	#173D7E
RGB	rgb(23, 61, 126)
HSL	hsl(218, 69%, 29%)
HSV	hsv(218, 82%, 49%)
CMYK	cmyk(81.7%, 51.6%, 0%, 50.6%)
CIE-LAB	lab(26.81, 12.19, -40.64)
CIE-LCH	lch(26.81, 42.42, 286.69°)
OKLab	oklab(37.3% -0.0197 -0.1169)
OKLCH	oklch(37.3% 0.119 260.4)
XYZ	xyz(5.7866, 5.0253, 20.3996)
Luminance	0.0503 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D7E #7E5817

analogous

#17717E #173D7E #24177E

triadic

#173D7E #7E173D #3D7E17

tetradic

#173D7E #7E1771 #7E5817 #177E24

square

#173D7E #7E1771 #7E5817 #177E24

split-complementary

#173D7E #7E2417 #717E17

monochromatic

#050D1A #0E244A #173D7E #2056B2 #3572DA

Accessibility & contrast

On white

10.47

#173D7E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#173D7E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D7E

10.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D7E	#FFFFFF	#000000	##FFFFFF
##173D7E	1.00	10.47	2.01	10.47
#FFFFFF	10.47	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#154480

Deuteranopia (green-blind)

#003B7D

Tritanopia (blue-blind)

#004D57

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #173d7e;
/* rgb */ color: rgb(23, 61, 126);
/* oklch */ color: oklch(37.3% 0.119 260.4);

Tailwind

colors: {
  custom: {
    50: '#6671a4',
    500: '#173d7e',
    950: '#000000',
  },
}

SCSS

$custom: #173d7e;
$custom-light: #6671a4;
$custom-dark: #000000;

JSON

{
  "hex": "#173d7e",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 126
  },
  "hsl": {
    "h": 217.864,
    "s": 69.128,
    "l": 29.216
  },
  "oklch": {
    "l": 0.37301,
    "c": 0.11856,
    "h": 260.4
  },
  "luminance": 0.05026
}

Semantic roles & 50–950 ramp

primary

#173D7E

secondary

#B3883E

accent

#AB3CEC

background

#F6F6FA

surface

#EBECF4

border

#C6C7CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #173D7E

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

Preview Lab → · Contrast checker → · Palette generator →