#172F7B#172F7B

#172F7B is a dark, vivid blue. Relative luminance 0.036; OKLCH L 33.9% C 0.133 H 266.0°. Best body text is #FFFFFF at 12.15:1 contrast (WCAG AA passes).

Color values

HEX	#172F7B
RGB	rgb(23, 47, 123)
HSL	hsl(226, 68%, 29%)
HSV	hsv(226, 81%, 48%)
CMYK	cmyk(81.3%, 61.8%, 0%, 51.8%)
CIE-LAB	lab(22.46, 20.87, -45.80)
CIE-LCH	lch(22.46, 50.33, 294.49°)
OKLab	oklab(33.94% -0.0093 -0.1324)
OKLCH	oklch(33.94% 0.133 266)
XYZ	xyz(4.9438, 3.6447, 19.1780)
Luminance	0.0365 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F7B #7B6317

analogous

#17617B #172F7B #31177B

triadic

#172F7B #7B172F #2F7B17

tetradic

#172F7B #7B1761 #7B6317 #177B31

square

#172F7B #7B1761 #7B6317 #177B31

split-complementary

#172F7B #7B3117 #617B17

monochromatic

#050A1A #0D1B47 #172F7B #2143AF #335BD9

Accessibility & contrast

On white

12.15

#172F7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#172F7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F7B

12.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F7B	#FFFFFF	#000000	##FFFFFF
##172F7B	1.00	12.15	1.73	12.15
#FFFFFF	12.15	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A7E

Deuteranopia (green-blind)

#00317A

Tritanopia (blue-blind)

#004250

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #172f7b;
/* rgb */ color: rgb(23, 47, 123);
/* oklch */ color: oklch(33.9% 0.133 266.0);

Tailwind

colors: {
  custom: {
    50: '#6667a2',
    500: '#172f7b',
    950: '#000000',
  },
}

SCSS

$custom: #172f7b;
$custom-light: #6667a2;
$custom-dark: #000000;

JSON

{
  "hex": "#172f7b",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 123
  },
  "hsl": {
    "h": 225.6,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.33937,
    "c": 0.13269,
    "h": 266
  },
  "luminance": 0.03645
}

Semantic roles & 50–950 ramp

primary

#172F7B

secondary

#B0953E

accent

#C13CEB

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #172F7B

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

Preview Lab → · Contrast checker → · Palette generator →