#172A4E#172A4E

#172A4E is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.0% C 0.071 H 262.0°. Best body text is #FFFFFF at 14.21:1 contrast (WCAG AA passes).

Color values

HEX	#172A4E
RGB	rgb(23, 42, 78)
HSL	hsl(219, 54%, 20%)
HSV	hsv(219, 71%, 31%)
CMYK	cmyk(70.5%, 46.2%, 0%, 69.4%)
CIE-LAB	lab(17.40, 5.82, -24.51)
CIE-LCH	lch(17.40, 25.19, 283.35°)
OKLab	oklab(28.98% -0.0098 -0.0699)
OKLCH	oklch(28.98% 0.071 262)
XYZ	xyz(2.5560, 2.3879, 7.5325)
Luminance	0.0239 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172A4E #4E3B17

analogous

#17454E #172A4E #20174E

triadic

#172A4E #4E172A #2A4E17

tetradic

#172A4E #4E1745 #4E3B17 #174E20

square

#172A4E #4E1745 #4E3B17 #174E20

split-complementary

#172A4E #4E2017 #454E17

monochromatic

#070D18 #09111F #172A4E #25437D #335DAD

Accessibility & contrast

On white

14.21

#172A4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#172A4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172A4E

14.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172A4E	#FFFFFF	#000000	##FFFFFF
##172A4E	1.00	14.21	1.48	14.21
#FFFFFF	14.21	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1A2D4F

Deuteranopia (green-blind)

#11284D

Tritanopia (blue-blind)

#003238

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172a4e;
/* rgb */ color: rgb(23, 42, 78);
/* oklch */ color: oklch(29.0% 0.071 262.0);

Tailwind

colors: {
  custom: {
    50: '#5b6380',
    500: '#172a4e',
    950: '#000000',
  },
}

SCSS

$custom: #172a4e;
$custom-light: #5b6380;
$custom-dark: #000000;

JSON

{
  "hex": "#172a4e",
  "rgb": {
    "r": 23,
    "g": 42,
    "b": 78
  },
  "hsl": {
    "h": 219.273,
    "s": 54.455,
    "l": 19.804
  },
  "oklch": {
    "l": 0.28983,
    "c": 0.07055,
    "h": 262
  },
  "luminance": 0.02388
}

Semantic roles & 50–950 ramp

primary

#172A4E

secondary

#856C3C

accent

#AB4ADE

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #172A4E

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

Preview Lab → · Contrast checker → · Palette generator →