#173D77#173D77

#173D77 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.8% C 0.108 H 258.9°. Best body text is #FFFFFF at 10.66:1 contrast (WCAG AA passes).

Color values

HEX	#173D77
RGB	rgb(23, 61, 119)
HSL	hsl(216, 68%, 28%)
HSV	hsv(216, 81%, 47%)
CMYK	cmyk(80.7%, 48.7%, 0%, 53.3%)
CIE-LAB	lab(26.31, 9.28, -37.03)
CIE-LCH	lch(26.31, 38.18, 284.06°)
OKLab	oklab(36.76% -0.0209 -0.1063)
OKLCH	oklch(36.76% 0.108 258.9)
XYZ	xyz(5.3507, 4.8509, 18.1035)
Luminance	0.0485 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D77 #775117

analogous

#176D77 #173D77 #211777

triadic

#173D77 #77173D #3D7717

tetradic

#173D77 #77176D #775117 #177721

square

#173D77 #77176D #775117 #177721

split-complementary

#173D77 #772117 #6D7717

monochromatic

#050D1A #0D2344 #173D77 #2157AA #3173D7

Accessibility & contrast

On white

10.66

#173D77 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#173D77 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D77

10.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D77	#FFFFFF	#000000	##FFFFFF
##173D77	1.00	10.66	1.97	10.66
#FFFFFF	10.66	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4379

Deuteranopia (green-blind)

#043A76

Tritanopia (blue-blind)

#004B54

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173d77;
/* rgb */ color: rgb(23, 61, 119);
/* oklch */ color: oklch(36.8% 0.108 258.9);

Tailwind

colors: {
  custom: {
    50: '#64719f',
    500: '#173d77',
    950: '#000000',
  },
}

SCSS

$custom: #173d77;
$custom-light: #64719f;
$custom-dark: #000000;

JSON

{
  "hex": "#173d77",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 119
  },
  "hsl": {
    "h": 216.25,
    "s": 67.606,
    "l": 27.843
  },
  "oklch": {
    "l": 0.36756,
    "c": 0.10834,
    "h": 258.9
  },
  "luminance": 0.04852
}

Semantic roles & 50–950 ramp

primary

#173D77

secondary

#AC803E

accent

#A63DEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173D77

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

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