#172D7C#172D7C

#172D7C is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.6% C 0.137 H 266.7°. Best body text is #FFFFFF at 12.33:1 contrast (WCAG AA passes).

Color values

HEX	#172D7C
RGB	rgb(23, 45, 124)
HSL	hsl(227, 69%, 29%)
HSV	hsv(227, 81%, 49%)
CMYK	cmyk(81.5%, 63.7%, 0%, 51.4%)
CIE-LAB	lab(21.99, 22.69, -47.20)
CIE-LCH	lch(21.99, 52.37, 295.67°)
OKLab	oklab(33.62% -0.0079 -0.1365)
OKLCH	oklch(33.62% 0.137 266.7)
XYZ	xyz(4.9286, 3.5136, 19.4833)
Luminance	0.0351 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172D7C #7C6617

analogous

#17607C #172D7C #34177C

triadic

#172D7C #7C172D #2D7C17

tetradic

#172D7C #7C1760 #7C6617 #177C34

square

#172D7C #7C1760 #7C6617 #177C34

split-complementary

#172D7C #7C3417 #607C17

monochromatic

#05091A #0D1A48 #172D7C #2140B0 #3458D9

Accessibility & contrast

On white

12.33

#172D7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#172D7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172D7C

12.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172D7C	#FFFFFF	#000000	##FFFFFF
##172D7C	1.00	12.33	1.70	12.33
#FFFFFF	12.33	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A7F

Deuteranopia (green-blind)

#00307A

Tritanopia (blue-blind)

#004150

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #172d7c;
/* rgb */ color: rgb(23, 45, 124);
/* oklch */ color: oklch(33.6% 0.137 266.7);

Tailwind

colors: {
  custom: {
    50: '#6665a3',
    500: '#172d7c',
    950: '#000000',
  },
}

SCSS

$custom: #172d7c;
$custom-light: #6665a3;
$custom-dark: #000000;

JSON

{
  "hex": "#172d7c",
  "rgb": {
    "r": 23,
    "g": 45,
    "b": 124
  },
  "hsl": {
    "h": 226.931,
    "s": 68.707,
    "l": 28.824
  },
  "oklch": {
    "l": 0.33617,
    "c": 0.13671,
    "h": 266.7
  },
  "luminance": 0.03514
}

Semantic roles & 50–950 ramp

primary

#172D7C

secondary

#B1983E

accent

#C53CEC

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #172D7C

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

Preview Lab → · Contrast checker → · Palette generator →