#172B5B#172B5B

#172B5B is a dark, moderate blue. Relative luminance 0.027; OKLCH L 30.2% C 0.090 H 264.6°. Best body text is #FFFFFF at 13.70:1 contrast (WCAG AA passes).

Color values

HEX	#172B5B
RGB	rgb(23, 43, 91)
HSL	hsl(222, 60%, 22%)
HSV	hsv(222, 75%, 36%)
CMYK	cmyk(74.7%, 52.7%, 0%, 64.3%)
CIE-LAB	lab(18.65, 10.49, -31.23)
CIE-LCH	lch(18.65, 32.95, 288.56°)
OKLab	oklab(30.24% -0.0085 -0.0896)
OKLCH	oklch(30.24% 0.09 264.6)
XYZ	xyz(3.1049, 2.6649, 10.2463)
Luminance	0.0267 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B5B #5B4717

analogous

#174D5B #172B5B #25175B

triadic

#172B5B #5B172B #2B5B17

tetradic

#172B5B #5B174D #5B4717 #175B25

square

#172B5B #5B174D #5B4717 #175B25

split-complementary

#172B5B #5B2517 #4D5B17

monochromatic

#060C18 #0B142A #172B5B #23428C #3059BD

Accessibility & contrast

On white

13.70

#172B5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.53

#172B5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B5B

13.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B5B	#FFFFFF	#000000	##FFFFFF
##172B5B	1.00	13.70	1.53	13.70
#FFFFFF	13.70	1.00	21.00	1.00
#000000	1.53	21.00	1.00	21.00
##FFFFFF	13.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#10315D

Deuteranopia (green-blind)

#002A5A

Tritanopia (blue-blind)

#00363E

Achromatopsia (no color)

#2D2D2D

Design tokens & code

CSS

--color: #172b5b;
/* rgb */ color: rgb(23, 43, 91);
/* oklch */ color: oklch(30.2% 0.090 264.6);

Tailwind

colors: {
  custom: {
    50: '#5e638a',
    500: '#172b5b',
    950: '#000000',
  },
}

SCSS

$custom: #172b5b;
$custom-light: #5e638a;
$custom-dark: #000000;

JSON

{
  "hex": "#172b5b",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 91
  },
  "hsl": {
    "h": 222.353,
    "s": 59.649,
    "l": 22.353
  },
  "oklch": {
    "l": 0.30235,
    "c": 0.09,
    "h": 264.6
  },
  "luminance": 0.02665
}

Semantic roles & 50–950 ramp

primary

#172B5B

secondary

#92793C

accent

#B445E3

background

#F5F5F8

surface

#E9EAF0

border

#C5C6CB

text

#05050C

muted

#79797D

Preview Lab

Preview with #172B5B

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

Preview Lab → · Contrast checker → · Palette generator →