#172B66#172B66

#172B66 is a dark, moderate blue. Relative luminance 0.029; OKLCH L 31.2% C 0.107 H 266.1°. Best body text is #FFFFFF at 13.34:1 contrast (WCAG AA passes).

Color values

HEX	#172B66
RGB	rgb(23, 43, 102)
HSL	hsl(225, 63%, 25%)
HSV	hsv(225, 77%, 40%)
CMYK	cmyk(77.5%, 57.8%, 0%, 60%)
CIE-LAB	lab(19.51, 15.08, -37.08)
CIE-LCH	lch(19.51, 40.03, 292.13°)
OKLab	oklab(31.16% -0.0072 -0.1068)
OKLCH	oklch(31.16% 0.107 266.1)
XYZ	xyz(3.6147, 2.8688, 12.9310)
Luminance	0.0287 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B66 #665217

analogous

#175366 #172B66 #2B1766

triadic

#172B66 #66172B #2B6617

tetradic

#172B66 #661753 #665217 #17662B

square

#172B66 #661753 #665217 #17662B

split-complementary

#172B66 #662B17 #536617

monochromatic

#060B19 #0C1634 #172B66 #224098 #2E55CA

Accessibility & contrast

On white

13.34

#172B66 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#172B66 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B66

13.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B66	#FFFFFF	#000000	##FFFFFF
##172B66	1.00	13.34	1.57	13.34
#FFFFFF	13.34	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003368

Deuteranopia (green-blind)

#002C65

Tritanopia (blue-blind)

#003944

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #172b66;
/* rgb */ color: rgb(23, 43, 102);
/* oklch */ color: oklch(31.2% 0.107 266.1);

Tailwind

colors: {
  custom: {
    50: '#616392',
    500: '#172b66',
    950: '#000000',
  },
}

SCSS

$custom: #172b66;
$custom-light: #616392;
$custom-dark: #000000;

JSON

{
  "hex": "#172b66",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 102
  },
  "hsl": {
    "h": 224.81,
    "s": 63.2,
    "l": 24.51
  },
  "oklch": {
    "l": 0.31164,
    "c": 0.10706,
    "h": 266.1
  },
  "luminance": 0.02869
}

Semantic roles & 50–950 ramp

primary

#172B66

secondary

#9C843C

accent

#BD42E6

background

#F6F5F9

surface

#EBEAF1

border

#C6C6CB

text

#05050D

muted

#7A797E

Preview Lab

Preview with #172B66

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

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