#172C4E#172C4E

#172C4E is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.5% C 0.068 H 259.6°. Best body text is #FFFFFF at 13.94:1 contrast (WCAG AA passes).

Color values

HEX	#172C4E
RGB	rgb(23, 44, 78)
HSL	hsl(217, 54%, 20%)
HSV	hsv(217, 71%, 31%)
CMYK	cmyk(70.5%, 43.6%, 0%, 69.4%)
CIE-LAB	lab(18.07, 4.36, -23.45)
CIE-LCH	lch(18.07, 23.85, 280.53°)
OKLab	oklab(29.5% -0.0122 -0.0667)
OKLCH	oklch(29.5% 0.068 259.6)
XYZ	xyz(2.6287, 2.5333, 7.5567)
Luminance	0.0253 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172C4E #4E3917

analogous

#17484E #172C4E #1E174E

triadic

#172C4E #4E172C #2C4E17

tetradic

#172C4E #4E1748 #4E3917 #174E1E

square

#172C4E #4E1748 #4E3917 #174E1E

split-complementary

#172C4E #4E1E17 #484E17

monochromatic

#070D18 #09111F #172C4E #25477D #3361AD

Accessibility & contrast

On white

13.94

#172C4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#172C4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172C4E

13.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172C4E	#FFFFFF	#000000	##FFFFFF
##172C4E	1.00	13.94	1.51	13.94
#FFFFFF	13.94	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D2F4F

Deuteranopia (green-blind)

#152A4D

Tritanopia (blue-blind)

#003439

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #172c4e;
/* rgb */ color: rgb(23, 44, 78);
/* oklch */ color: oklch(29.5% 0.068 259.6);

Tailwind

colors: {
  custom: {
    50: '#5b6480',
    500: '#172c4e',
    950: '#000000',
  },
}

SCSS

$custom: #172c4e;
$custom-light: #5b6480;
$custom-dark: #000000;

JSON

{
  "hex": "#172c4e",
  "rgb": {
    "r": 23,
    "g": 44,
    "b": 78
  },
  "hsl": {
    "h": 217.091,
    "s": 54.455,
    "l": 19.804
  },
  "oklch": {
    "l": 0.29497,
    "c": 0.06784,
    "h": 259.6
  },
  "luminance": 0.02534
}

Semantic roles & 50–950 ramp

primary

#172C4E

secondary

#85693C

accent

#A54ADE

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #172C4E

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

Preview Lab → · Contrast checker → · Palette generator →