#172F5F#172F5F

#172F5F is a dark, moderate blue. Relative luminance 0.030; OKLCH L 31.5% C 0.091 H 262.4°. Best body text is #FFFFFF at 13.06:1 contrast (WCAG AA passes).

Color values

HEX	#172F5F
RGB	rgb(23, 47, 95)
HSL	hsl(220, 61%, 23%)
HSV	hsv(220, 76%, 37%)
CMYK	cmyk(75.8%, 50.5%, 0%, 62.7%)
CIE-LAB	lab(20.21, 9.24, -31.37)
CIE-LCH	lch(20.21, 32.70, 286.41°)
OKLab	oklab(31.52% -0.0119 -0.0899)
OKLCH	oklch(31.52% 0.091 262.4)
XYZ	xyz(3.4347, 3.0411, 11.2302)
Luminance	0.0304 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172F5F #5F4717

analogous

#17535F #172F5F #23175F

triadic

#172F5F #5F172F #2F5F17

tetradic

#172F5F #5F1753 #5F4717 #175F23

square

#172F5F #5F1753 #5F4717 #175F23

split-complementary

#172F5F #5F2317 #535F17

monochromatic

#060C19 #0B172E #172F5F #234790 #2F60C2

Accessibility & contrast

On white

13.06

#172F5F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#172F5F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172F5F

13.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172F5F	#FFFFFF	#000000	##FFFFFF
##172F5F	1.00	13.06	1.61	13.06
#FFFFFF	13.06	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#163461

Deuteranopia (green-blind)

#052E5E

Tritanopia (blue-blind)

#003A42

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #172f5f;
/* rgb */ color: rgb(23, 47, 95);
/* oklch */ color: oklch(31.5% 0.091 262.4);

Tailwind

colors: {
  custom: {
    50: '#5f678d',
    500: '#172f5f',
    950: '#000000',
  },
}

SCSS

$custom: #172f5f;
$custom-light: #5f678d;
$custom-dark: #000000;

JSON

{
  "hex": "#172f5f",
  "rgb": {
    "r": 23,
    "g": 47,
    "b": 95
  },
  "hsl": {
    "h": 220,
    "s": 61.017,
    "l": 23.137
  },
  "oklch": {
    "l": 0.31522,
    "c": 0.09071,
    "h": 262.4
  },
  "luminance": 0.03041
}

Semantic roles & 50–950 ramp

primary

#172F5F

secondary

#96783C

accent

#AF44E4

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05060C

muted

#797A7D

Preview Lab

Preview with #172F5F

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

Preview Lab → · Contrast checker → · Palette generator →