#172A7B#172A7B

#172A7B is a dark, vivid blue. Relative luminance 0.033; OKLCH L 32.9% C 0.139 H 267.5°. Best body text is #FFFFFF at 12.70:1 contrast (WCAG AA passes).

Color values

HEX	#172A7B
RGB	rgb(23, 42, 123)
HSL	hsl(229, 68%, 29%)
HSV	hsv(229, 81%, 48%)
CMYK	cmyk(81.3%, 65.9%, 0%, 51.8%)
CIE-LAB	lab(21.09, 24.39, -48.05)
CIE-LCH	lch(21.09, 53.88, 296.91°)
OKLab	oklab(32.92% -0.006 -0.139)
OKLCH	oklch(32.92% 0.139 267.5)
XYZ	xyz(4.7552, 3.2676, 19.1151)
Luminance	0.0327 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A7B #7B6817

analogous

#175C7B #172A7B #36177B

triadic

#172A7B #7B172A #2A7B17

tetradic

#172A7B #7B175C #7B6817 #177B36

square

#172A7B #7B175C #7B6817 #177B36

split-complementary

#172A7B #7B3617 #5C7B17

monochromatic

#05091A #0D1847 #172A7B #213CAF #3353D9

Accessibility & contrast

On white

12.70

#172A7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.65

#172A7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A7B

12.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A7B	#FFFFFF	#000000	##FFFFFF
##172A7B	1.00	12.70	1.65	12.70
#FFFFFF	12.70	1.00	21.00	1.00
#000000	1.65	21.00	1.00	21.00
##FFFFFF	12.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00377E

Deuteranopia (green-blind)

#002E79

Tritanopia (blue-blind)

#003F4E

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #172a7b;
/* rgb */ color: rgb(23, 42, 123);
/* oklch */ color: oklch(32.9% 0.139 267.5);

Tailwind

colors: {
  custom: {
    50: '#6663a2',
    500: '#172a7b',
    950: '#000000',
  },
}

SCSS

$custom: #172a7b;
$custom-light: #6663a2;
$custom-dark: #000000;

JSON

{
  "hex": "#172a7b",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 123
  },
  "hsl": {
    "h": 228.6,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.32917,
    "c": 0.13914,
    "h": 267.5
  },
  "luminance": 0.03268
}

Semantic roles & 50–950 ramp

primary

#172A7B

secondary

#B09A3E

accent

#CA3CEB

background

#F6F5FA

surface

#EBEAF4

border

#C6C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #172A7B

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

Preview Lab → · Contrast checker → · Palette generator →