#172D5A#172D5A

#172D5A is a dark, moderate blue. Relative luminance 0.028; OKLCH L 30.6% C 0.086 H 262.8°. Best body text is #FFFFFF at 13.47:1 contrast (WCAG AA passes).

Color values

HEX	#172D5A
RGB	rgb(23, 45, 90)
HSL	hsl(220, 59%, 22%)
HSV	hsv(220, 74%, 35%)
CMYK	cmyk(74.4%, 50%, 0%, 64.7%)
CIE-LAB	lab(19.21, 8.60, -29.66)
CIE-LCH	lch(19.21, 30.89, 286.18°)
OKLab	oklab(30.64% -0.0107 -0.0849)
OKLCH	oklch(30.64% 0.086 262.8)
XYZ	xyz(3.1365, 2.7968, 10.0454)
Luminance	0.0280 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D5A #5A4417

analogous

#174E5A #172D5A #23175A

triadic

#172D5A #5A172D #2D5A17

tetradic

#172D5A #5A174E #5A4417 #175A23

square

#172D5A #5A174E #5A4417 #175A23

split-complementary

#172D5A #5A2317 #4E5A17

monochromatic

#060C18 #0B1529 #172D5A #23458B #305EBB

Accessibility & contrast

On white

13.47

#172D5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#172D5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D5A

13.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D5A	#FFFFFF	#000000	##FFFFFF
##172D5A	1.00	13.47	1.56	13.47
#FFFFFF	13.47	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#16325C

Deuteranopia (green-blind)

#082C59

Tritanopia (blue-blind)

#00373F

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172d5a;
/* rgb */ color: rgb(23, 45, 90);
/* oklch */ color: oklch(30.6% 0.086 262.8);

Tailwind

colors: {
  custom: {
    50: '#5d6589',
    500: '#172d5a',
    950: '#000000',
  },
}

SCSS

$custom: #172d5a;
$custom-light: #5d6589;
$custom-dark: #000000;

JSON

{
  "hex": "#172d5a",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 90
  },
  "hsl": {
    "h": 220.299,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.30642,
    "c": 0.08563,
    "h": 262.8
  },
  "luminance": 0.02797
}

Semantic roles & 50–950 ramp

primary

#172D5A

secondary

#91753C

accent

#AF45E2

background

#F5F6F8

surface

#E9EBF0

border

#C5C6CB

text

#05050B

muted

#797A7C

Preview Lab

Preview with #172D5A

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

Preview Lab → · Contrast checker → · Palette generator →