#172C5B#172C5B

#172C5B is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.5% C 0.089 H 263.8°. Best body text is #FFFFFF at 13.57:1 contrast (WCAG AA passes).

Color values

HEX	#172C5B
RGB	rgb(23, 44, 91)
HSL	hsl(221, 60%, 22%)
HSV	hsv(221, 75%, 36%)
CMYK	cmyk(74.7%, 51.6%, 0%, 64.3%)
CIE-LAB	lab(18.96, 9.75, -30.72)
CIE-LCH	lch(18.96, 32.23, 287.62°)
OKLab	oklab(30.48% -0.0095 -0.0881)
OKLCH	oklch(30.48% 0.089 263.8)
XYZ	xyz(3.1417, 2.7385, 10.2585)
Luminance	0.0274 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C5B #5B4617

analogous

#174E5B #172C5B #24175B

triadic

#172C5B #5B172C #2C5B17

tetradic

#172C5B #5B174E #5B4617 #175B24

square

#172C5B #5B174E #5B4617 #175B24

split-complementary

#172C5B #5B2417 #4E5B17

monochromatic

#060C18 #0B142A #172C5B #23448C #305BBD

Accessibility & contrast

On white

13.57

#172C5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#172C5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C5B

13.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C5B	#FFFFFF	#000000	##FFFFFF
##172C5B	1.00	13.57	1.55	13.57
#FFFFFF	13.57	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#13315D

Deuteranopia (green-blind)

#032B5A

Tritanopia (blue-blind)

#00373F

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #172c5b;
/* rgb */ color: rgb(23, 44, 91);
/* oklch */ color: oklch(30.5% 0.089 263.8);

Tailwind

colors: {
  custom: {
    50: '#5e648a',
    500: '#172c5b',
    950: '#000000',
  },
}

SCSS

$custom: #172c5b;
$custom-light: #5e648a;
$custom-dark: #000000;

JSON

{
  "hex": "#172c5b",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 91
  },
  "hsl": {
    "h": 221.471,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.30477,
    "c": 0.08859,
    "h": 263.8
  },
  "luminance": 0.02739
}

Semantic roles & 50–950 ramp

primary

#172C5B

secondary

#92773C

accent

#B245E3

background

#F5F5F8

surface

#E9EAF0

border

#C5C6CB

text

#05050B

muted

#79797C

Preview Lab

Preview with #172C5B

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

Preview Lab → · Contrast checker → · Palette generator →