#173B75#173B75

#173B75 is a dark, moderate blue. Relative luminance 0.046; OKLCH L 36.1% C 0.108 H 259.6°. Best body text is #FFFFFF at 10.94:1 contrast (WCAG AA passes).

Color values

HEX	#173B75
RGB	rgb(23, 59, 117)
HSL	hsl(217, 67%, 27%)
HSV	hsv(217, 80%, 46%)
CMYK	cmyk(80.3%, 49.6%, 0%, 54.1%)
CIE-LAB	lab(25.55, 9.85, -36.99)
CIE-LCH	lch(25.55, 38.28, 284.91°)
OKLab	oklab(36.13% -0.0194 -0.1062)
OKLCH	oklch(36.13% 0.108 259.6)
XYZ	xyz(5.1270, 4.5939, 17.4427)
Luminance	0.0459 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173B75 #755117

analogous

#176A75 #173B75 #221775

triadic

#173B75 #75173B #3B7517

tetradic

#173B75 #75176A #755117 #177522

square

#173B75 #75176A #755117 #177522

split-complementary

#173B75 #752217 #6A7517

monochromatic

#050D1A #0D2142 #173B75 #2155A8 #3070D6

Accessibility & contrast

On white

10.94

#173B75 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.92

#173B75 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173B75

10.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173B75	#FFFFFF	#000000	##FFFFFF
##173B75	1.00	10.94	1.92	10.94
#FFFFFF	10.94	1.00	21.00	1.00
#000000	1.92	21.00	1.00	21.00
##FFFFFF	10.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B4177

Deuteranopia (green-blind)

#013974

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #173b75;
/* rgb */ color: rgb(23, 59, 117);
/* oklch */ color: oklch(36.1% 0.108 259.6);

Tailwind

colors: {
  custom: {
    50: '#64709d',
    500: '#173b75',
    950: '#000000',
  },
}

SCSS

$custom: #173b75;
$custom-light: #64709d;
$custom-dark: #000000;

JSON

{
  "hex": "#173b75",
  "rgb": {
    "r": 23,
    "g": 59,
    "b": 117
  },
  "hsl": {
    "h": 217.021,
    "s": 67.143,
    "l": 27.451
  },
  "oklch": {
    "l": 0.36126,
    "c": 0.108,
    "h": 259.6
  },
  "luminance": 0.04594
}

Semantic roles & 50–950 ramp

primary

#173B75

secondary

#AA813D

accent

#A83EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173B75

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

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