#172F6B#172F6B

#172F6B is a dark, moderate blue. Relative luminance 0.033; OKLCH L 32.5% C 0.109 H 264.6°. Best body text is #FFFFFF at 12.69:1 contrast (WCAG AA passes).

Color values

HEX	#172F6B
RGB	rgb(23, 47, 107)
HSL	hsl(223, 65%, 25%)
HSV	hsv(223, 79%, 42%)
CMYK	cmyk(78.5%, 56.1%, 0%, 58%)
CIE-LAB	lab(21.12, 14.26, -37.73)
CIE-LCH	lch(21.12, 40.33, 290.70°)
OKLab	oklab(32.51% -0.0103 -0.1086)
OKLCH	oklch(32.51% 0.109 264.6)
XYZ	xyz(4.0228, 3.2763, 14.3274)
Luminance	0.0328 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F6B #6B5317

analogous

#17596B #172F6B #29176B

triadic

#172F6B #6B172F #2F6B17

tetradic

#172F6B #6B1759 #6B5317 #176B29

square

#172F6B #6B1759 #6B5317 #176B29

split-complementary

#172F6B #6B2917 #596B17

monochromatic

#050B19 #0C1939 #172F6B #22459D #2D5BD0

Accessibility & contrast

On white

12.69

#172F6B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#172F6B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F6B

12.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F6B	#FFFFFF	#000000	##FFFFFF
##172F6B	1.00	12.69	1.66	12.69
#FFFFFF	12.69	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#04376D

Deuteranopia (green-blind)

#002F6A

Tritanopia (blue-blind)

#003E48

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #172f6b;
/* rgb */ color: rgb(23, 47, 107);
/* oklch */ color: oklch(32.5% 0.109 264.6);

Tailwind

colors: {
  custom: {
    50: '#626796',
    500: '#172f6b',
    950: '#000000',
  },
}

SCSS

$custom: #172f6b;
$custom-light: #626796;
$custom-dark: #000000;

JSON

{
  "hex": "#172f6b",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 107
  },
  "hsl": {
    "h": 222.857,
    "s": 64.615,
    "l": 25.49
  },
  "oklch": {
    "l": 0.32507,
    "c": 0.10913,
    "h": 264.6
  },
  "luminance": 0.03277
}

Semantic roles & 50–950 ramp

primary

#172F6B

secondary

#A1843D

accent

#B840E8

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #172F6B

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

Preview Lab → · Contrast checker → · Palette generator →