#172D7B#172D7B

#172D7B is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.5% C 0.135 H 266.6°. Best body text is #FFFFFF at 12.37:1 contrast (WCAG AA passes).

Color values

HEX	#172D7B
RGB	rgb(23, 45, 123)
HSL	hsl(227, 68%, 29%)
HSV	hsv(227, 81%, 48%)
CMYK	cmyk(81.3%, 63.4%, 0%, 51.8%)
CIE-LAB	lab(21.90, 22.28, -46.71)
CIE-LCH	lch(21.90, 51.75, 295.50°)
OKLab	oklab(33.52% -0.0079 -0.1351)
OKLCH	oklch(33.52% 0.135 266.6)
XYZ	xyz(4.8656, 3.4884, 19.1519)
Luminance	0.0349 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D7B #7B6517

analogous

#175F7B #172D7B #33177B

triadic

#172D7B #7B172D #2D7B17

tetradic

#172D7B #7B175F #7B6517 #177B33

square

#172D7B #7B175F #7B6517 #177B33

split-complementary

#172D7B #7B3317 #5F7B17

monochromatic

#05091A #0D1A47 #172D7B #2140AF #3358D9

Accessibility & contrast

On white

12.37

#172D7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#172D7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D7B

12.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D7B	#FFFFFF	#000000	##FFFFFF
##172D7B	1.00	12.37	1.70	12.37
#FFFFFF	12.37	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00397E

Deuteranopia (green-blind)

#00307A

Tritanopia (blue-blind)

#00414F

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #172d7b;
/* rgb */ color: rgb(23, 45, 123);
/* oklch */ color: oklch(33.5% 0.135 266.6);

Tailwind

colors: {
  custom: {
    50: '#6665a2',
    500: '#172d7b',
    950: '#000000',
  },
}

SCSS

$custom: #172d7b;
$custom-light: #6665a2;
$custom-dark: #000000;

JSON

{
  "hex": "#172d7b",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 123
  },
  "hsl": {
    "h": 226.8,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.33522,
    "c": 0.13529,
    "h": 266.6
  },
  "luminance": 0.03489
}

Semantic roles & 50–950 ramp

primary

#172D7B

secondary

#B0973E

accent

#C53CEB

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #172D7B

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

Preview Lab → · Contrast checker → · Palette generator →