#172B7B#172B7B

#172B7B is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.1% C 0.138 H 267.2°. Best body text is #FFFFFF at 12.59:1 contrast (WCAG AA passes).

Color values

HEX	#172B7B
RGB	rgb(23, 43, 123)
HSL	hsl(228, 68%, 29%)
HSV	hsv(228, 81%, 48%)
CMYK	cmyk(81.3%, 65%, 0%, 51.8%)
CIE-LAB	lab(21.35, 23.69, -47.61)
CIE-LCH	lch(21.35, 53.17, 296.45°)
OKLab	oklab(33.12% -0.0067 -0.1377)
OKLCH	oklch(33.12% 0.138 267.2)
XYZ	xyz(4.7911, 3.3394, 19.1271)
Luminance	0.0334 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B7B #7B6717

analogous

#175D7B #172B7B #35177B

triadic

#172B7B #7B172B #2B7B17

tetradic

#172B7B #7B175D #7B6717 #177B35

square

#172B7B #7B175D #7B6717 #177B35

split-complementary

#172B7B #7B3517 #5D7B17

monochromatic

#05091A #0D1947 #172B7B #213DAF #3355D9

Accessibility & contrast

On white

12.59

#172B7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#172B7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B7B

12.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B7B	#FFFFFF	#000000	##FFFFFF
##172B7B	1.00	12.59	1.67	12.59
#FFFFFF	12.59	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00387E

Deuteranopia (green-blind)

#002F79

Tritanopia (blue-blind)

#00404E

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #172b7b;
/* rgb */ color: rgb(23, 43, 123);
/* oklch */ color: oklch(33.1% 0.138 267.2);

Tailwind

colors: {
  custom: {
    50: '#6664a2',
    500: '#172b7b',
    950: '#000000',
  },
}

SCSS

$custom: #172b7b;
$custom-light: #6664a2;
$custom-dark: #000000;

JSON

{
  "hex": "#172b7b",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 123
  },
  "hsl": {
    "h": 228,
    "s": 68.493,
    "l": 28.627
  },
  "oklch": {
    "l": 0.33116,
    "c": 0.13787,
    "h": 267.2
  },
  "luminance": 0.0334
}

Semantic roles & 50–950 ramp

primary

#172B7B

secondary

#B0993E

accent

#C83CEB

background

#F6F5FA

surface

#EBEAF4

border

#C6C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #172B7B

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

Preview Lab → · Contrast checker → · Palette generator →