#172C7B#172C7B

#172C7B is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.3% C 0.137 H 266.9°. Best body text is #FFFFFF at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#172C7B
RGB	rgb(23, 44, 123)
HSL	hsl(227, 68%, 29%)
HSV	hsv(227, 81%, 48%)
CMYK	cmyk(81.3%, 64.2%, 0%, 51.8%)
CIE-LAB	lab(21.63, 22.99, -47.16)
CIE-LCH	lch(21.63, 52.46, 295.98°)
OKLab	oklab(33.32% -0.0073 -0.1364)
OKLCH	oklch(33.32% 0.137 266.9)
XYZ	xyz(4.8279, 3.4130, 19.1394)
Luminance	0.0341 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C7B #7B6617

analogous

#175E7B #172C7B #34177B

triadic

#172C7B #7B172C #2C7B17

tetradic

#172C7B #7B175E #7B6617 #177B34

square

#172C7B #7B175E #7B6617 #177B34

split-complementary

#172C7B #7B3417 #5E7B17

monochromatic

#05091A #0D1A47 #172C7B #213EAF #3356D9

Accessibility & contrast

On white

12.48

#172C7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#172C7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C7B

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C7B	#FFFFFF	#000000	##FFFFFF
##172C7B	1.00	12.48	1.68	12.48
#FFFFFF	12.48	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00397E

Deuteranopia (green-blind)

#002F79

Tritanopia (blue-blind)

#00404F

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #172c7b;
/* rgb */ color: rgb(23, 44, 123);
/* oklch */ color: oklch(33.3% 0.137 266.9);

Tailwind

colors: {
  custom: {
    50: '#6664a2',
    500: '#172c7b',
    950: '#000000',
  },
}

SCSS

$custom: #172c7b;
$custom-light: #6664a2;
$custom-dark: #000000;

JSON

{
  "hex": "#172c7b",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 123
  },
  "hsl": {
    "h": 227.4,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.33318,
    "c": 0.13659,
    "h": 266.9
  },
  "luminance": 0.03414
}

Semantic roles & 50–950 ramp

primary

#172C7B

secondary

#B0983E

accent

#C73CEB

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07050F

muted

#7A7A7F

Preview Lab

Preview with #172C7B

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

Preview Lab → · Contrast checker → · Palette generator →