#172B7C#172B7C

#172B7C is a dark, vivid blue. Relative luminance 0.034; OKLCH L 33.2% C 0.139 H 267.3°. Best body text is #FFFFFF at 12.55:1 contrast (WCAG AA passes).

Color values

HEX	#172B7C
RGB	rgb(23, 43, 124)
HSL	hsl(228, 69%, 29%)
HSV	hsv(228, 81%, 49%)
CMYK	cmyk(81.5%, 65.3%, 0%, 51.4%)
CIE-LAB	lab(21.45, 24.09, -48.09)
CIE-LCH	lch(21.45, 53.78, 296.61°)
OKLab	oklab(33.21% -0.0067 -0.1391)
OKLCH	oklch(33.21% 0.139 267.3)
XYZ	xyz(4.8540, 3.3646, 19.4585)
Luminance	0.0336 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B7C #7C6817

analogous

#175E7C #172B7C #36177C

triadic

#172B7C #7C172B #2B7C17

tetradic

#172B7C #7C175E #7C6817 #177C36

square

#172B7C #7C175E #7C6817 #177C36

split-complementary

#172B7C #7C3617 #5E7C17

monochromatic

#05091A #0D1948 #172B7C #213DB0 #3455D9

Accessibility & contrast

On white

12.55

#172B7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#172B7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B7C

12.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B7C	#FFFFFF	#000000	##FFFFFF
##172B7C	1.00	12.55	1.67	12.55
#FFFFFF	12.55	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00387F

Deuteranopia (green-blind)

#002F7A

Tritanopia (blue-blind)

#00404F

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #172b7c;
/* rgb */ color: rgb(23, 43, 124);
/* oklch */ color: oklch(33.2% 0.139 267.3);

Tailwind

colors: {
  custom: {
    50: '#6764a3',
    500: '#172b7c',
    950: '#000000',
  },
}

SCSS

$custom: #172b7c;
$custom-light: #6764a3;
$custom-dark: #000000;

JSON

{
  "hex": "#172b7c",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 124
  },
  "hsl": {
    "h": 228.119,
    "s": 68.707,
    "l": 28.824
  },
  "oklch": {
    "l": 0.33214,
    "c": 0.13928,
    "h": 267.3
  },
  "luminance": 0.03365
}

Semantic roles & 50–950 ramp

primary

#172B7C

secondary

#B19A3E

accent

#C93CEC

background

#F6F5FA

surface

#EBEAF4

border

#C6C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #172B7C

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

Preview Lab → · Contrast checker → · Palette generator →