#172A5A#172A5A

#172A5A is a dark, moderate blue. Relative luminance 0.026; OKLCH L 29.9% C 0.090 H 265.1°. Best body text is #FFFFFF at 13.86:1 contrast (WCAG AA passes).

Color values

HEX	#172A5A
RGB	rgb(23, 42, 90)
HSL	hsl(223, 59%, 22%)
HSV	hsv(223, 74%, 35%)
CMYK	cmyk(74.4%, 53.3%, 0%, 64.7%)
CIE-LAB	lab(18.26, 10.80, -31.19)
CIE-LCH	lch(18.26, 33.01, 289.10°)
OKLab	oklab(29.91% -0.0076 -0.0895)
OKLCH	oklch(29.91% 0.09 265.1)
XYZ	xyz(3.0261, 2.5760, 10.0086)
Luminance	0.0258 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A5A #5A4717

analogous

#174C5A #172A5A #26175A

triadic

#172A5A #5A172A #2A5A17

tetradic

#172A5A #5A174C #5A4717 #175A26

square

#172A5A #5A174C #5A4717 #175A26

split-complementary

#172A5A #5A2617 #4C5A17

monochromatic

#060B18 #0B1329 #172A5A #23418B #3057BB

Accessibility & contrast

On white

13.86

#172A5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.52

#172A5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A5A

13.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A5A	#FFFFFF	#000000	##FFFFFF
##172A5A	1.00	13.86	1.52	13.86
#FFFFFF	13.86	1.00	21.00	1.00
#000000	1.52	21.00	1.00	21.00
##FFFFFF	13.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F305C

Deuteranopia (green-blind)

#002A59

Tritanopia (blue-blind)

#00353D

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172a5a;
/* rgb */ color: rgb(23, 42, 90);
/* oklch */ color: oklch(29.9% 0.090 265.1);

Tailwind

colors: {
  custom: {
    50: '#5e6389',
    500: '#172a5a',
    950: '#000000',
  },
}

SCSS

$custom: #172a5a;
$custom-light: #5e6389;
$custom-dark: #000000;

JSON

{
  "hex": "#172a5a",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 90
  },
  "hsl": {
    "h": 222.985,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.29914,
    "c": 0.08983,
    "h": 265.1
  },
  "luminance": 0.02576
}

Semantic roles & 50–950 ramp

primary

#172A5A

secondary

#91793C

accent

#B645E2

background

#F5F5F8

surface

#E9EAF0

border

#C5C6CB

text

#05050B

muted

#79797C

Preview Lab

Preview with #172A5A

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

Preview Lab → · Contrast checker → · Palette generator →