#172A4F#172A4F

#172A4F is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.1% C 0.072 H 262.3°. Best body text is #FFFFFF at 14.18:1 contrast (WCAG AA passes).

Color values

HEX	#172A4F
RGB	rgb(23, 42, 79)
HSL	hsl(220, 55%, 20%)
HSV	hsv(220, 71%, 31%)
CMYK	cmyk(70.9%, 46.8%, 0%, 69%)
CIE-LAB	lab(17.47, 6.23, -25.08)
CIE-LCH	lch(17.47, 25.84, 283.95°)
OKLab	oklab(29.06% -0.0096 -0.0715)
OKLCH	oklch(29.06% 0.072 262.3)
XYZ	xyz(2.5921, 2.4024, 7.7227)
Luminance	0.0240 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A4F #4F3C17

analogous

#17464F #172A4F #20174F

triadic

#172A4F #4F172A #2A4F17

tetradic

#172A4F #4F1746 #4F3C17 #174F20

square

#172A4F #4F1746 #4F3C17 #174F20

split-complementary

#172A4F #4F2017 #464F17

monochromatic

#070D18 #091120 #172A4F #25437E #335CAE

Accessibility & contrast

On white

14.18

#172A4F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#172A4F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A4F

14.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A4F	#FFFFFF	#000000	##FFFFFF
##172A4F	1.00	14.18	1.48	14.18
#FFFFFF	14.18	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#192E50

Deuteranopia (green-blind)

#10284E

Tritanopia (blue-blind)

#003238

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172a4f;
/* rgb */ color: rgb(23, 42, 79);
/* oklch */ color: oklch(29.1% 0.072 262.3);

Tailwind

colors: {
  custom: {
    50: '#5b6380',
    500: '#172a4f',
    950: '#000000',
  },
}

SCSS

$custom: #172a4f;
$custom-light: #5b6380;
$custom-dark: #000000;

JSON

{
  "hex": "#172a4f",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 79
  },
  "hsl": {
    "h": 219.643,
    "s": 54.902,
    "l": 20
  },
  "oklch": {
    "l": 0.29056,
    "c": 0.07217,
    "h": 262.3
  },
  "luminance": 0.02403
}

Semantic roles & 50–950 ramp

primary

#172A4F

secondary

#866D3C

accent

#AC4ADE

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #172A4F

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

Preview Lab → · Contrast checker → · Palette generator →