#173D74#173D74

#173D74 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.5% C 0.104 H 258.1°. Best body text is #FFFFFF at 10.74:1 contrast (WCAG AA passes).

Color values

HEX	#173D74
RGB	rgb(23, 61, 116)
HSL	hsl(215, 67%, 27%)
HSV	hsv(215, 80%, 45%)
CMYK	cmyk(80.2%, 47.4%, 0%, 54.5%)
CIE-LAB	lab(26.10, 8.03, -35.47)
CIE-LCH	lch(26.10, 36.36, 282.75°)
OKLab	oklab(36.53% -0.0214 -0.1017)
OKLCH	oklch(36.53% 0.104 258.1)
XYZ	xyz(5.1733, 4.7800, 17.1696)
Luminance	0.0478 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#173D74 #744E17

analogous

#176B74 #173D74 #201774

triadic

#173D74 #74173D #3D7417

tetradic

#173D74 #74176B #744E17 #177420

square

#173D74 #74176B #744E17 #177420

split-complementary

#173D74 #742017 #6B7417

monochromatic

#050D1A #0D2241 #173D74 #2158A7 #3073D6

Accessibility & contrast

On white

10.74

#173D74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#173D74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #173D74

10.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##173D74	#FFFFFF	#000000	##FFFFFF
##173D74	1.00	10.74	1.96	10.74
#FFFFFF	10.74	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#204276

Deuteranopia (green-blind)

#0B3A73

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #173d74;
/* rgb */ color: rgb(23, 61, 116);
/* oklch */ color: oklch(36.5% 0.104 258.1);

Tailwind

colors: {
  custom: {
    50: '#63729c',
    500: '#173d74',
    950: '#000000',
  },
}

SCSS

$custom: #173d74;
$custom-light: #63729c;
$custom-dark: #000000;

JSON

{
  "hex": "#173d74",
  "rgb": {
    "r": 23,
    "g": 61,
    "b": 116
  },
  "hsl": {
    "h": 215.484,
    "s": 66.906,
    "l": 27.255
  },
  "oklch": {
    "l": 0.3653,
    "c": 0.10394,
    "h": 258.1
  },
  "luminance": 0.04781
}

Semantic roles & 50–950 ramp

primary

#173D74

secondary

#A97D3D

accent

#A43EEA

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #173D74

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

Preview Lab → · Contrast checker → · Palette generator →