#172E5A#172E5A

#172E5A is a dark, moderate blue. Relative luminance 0.029; OKLCH L 30.9% C 0.084 H 261.9°. Best body text is #FFFFFF at 13.34:1 contrast (WCAG AA passes).

Color values

HEX	#172E5A
RGB	rgb(23, 46, 90)
HSL	hsl(219, 59%, 22%)
HSV	hsv(219, 74%, 35%)
CMYK	cmyk(74.4%, 48.9%, 0%, 64.7%)
CIE-LAB	lab(19.53, 7.88, -29.15)
CIE-LCH	lch(19.53, 30.19, 285.12°)
OKLab	oklab(30.89% -0.0118 -0.0834)
OKLCH	oklch(30.89% 0.084 261.9)
XYZ	xyz(3.1752, 2.8740, 10.0583)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172E5A #5A4317

analogous

#17505A #172E5A #22175A

triadic

#172E5A #5A172E #2E5A17

tetradic

#172E5A #5A1750 #5A4317 #175A22

square

#172E5A #5A1750 #5A4317 #175A22

split-complementary

#172E5A #5A2217 #505A17

monochromatic

#060C18 #0B1529 #172E5A #23478B #3060BB

Accessibility & contrast

On white

13.34

#172E5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#172E5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172E5A

13.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172E5A	#FFFFFF	#000000	##FFFFFF
##172E5A	1.00	13.34	1.57	13.34
#FFFFFF	13.34	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#18335C

Deuteranopia (green-blind)

#0B2C59

Tritanopia (blue-blind)

#00383F

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172e5a;
/* rgb */ color: rgb(23, 46, 90);
/* oklch */ color: oklch(30.9% 0.084 261.9);

Tailwind

colors: {
  custom: {
    50: '#5d6689',
    500: '#172e5a',
    950: '#000000',
  },
}

SCSS

$custom: #172e5a;
$custom-light: #5d6689;
$custom-dark: #000000;

JSON

{
  "hex": "#172e5a",
  "rgb": {
    "r": 23,
    "g": 46,
    "b": 90
  },
  "hsl": {
    "h": 219.403,
    "s": 59.292,
    "l": 22.157
  },
  "oklch": {
    "l": 0.30889,
    "c": 0.08424,
    "h": 261.9
  },
  "luminance": 0.02874
}

Semantic roles & 50–950 ramp

primary

#172E5A

secondary

#91743C

accent

#AD45E2

background

#F5F6F8

surface

#E9EBF0

border

#C5C6CB

text

#05050B

muted

#797A7C

Preview Lab

Preview with #172E5A

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

Preview Lab → · Contrast checker → · Palette generator →