#172B4C#172B4C

#172B4C is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.1% C 0.066 H 259.9°. Best body text is #FFFFFF at 14.13:1 contrast (WCAG AA passes).

Color values

HEX	#172B4C
RGB	rgb(23, 43, 76)
HSL	hsl(217, 54%, 19%)
HSV	hsv(217, 70%, 30%)
CMYK	cmyk(69.7%, 43.4%, 0%, 70.2%)
CIE-LAB	lab(17.61, 4.27, -22.83)
CIE-LCH	lch(17.61, 23.23, 280.58°)
OKLab	oklab(29.1% -0.0116 -0.0649)
OKLCH	oklch(29.1% 0.066 259.9)
XYZ	xyz(2.5213, 2.4315, 7.1725)
Luminance	0.0243 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B4C #4C3817

analogous

#17464C #172B4C #1E174C

triadic

#172B4C #4C172B #2B4C17

tetradic

#172B4C #4C1746 #4C3817 #174C1E

square

#172B4C #4C1746 #4C3817 #174C1E

split-complementary

#172B4C #4C1E17 #464C17

monochromatic

#070D17 #09101D #172B4C #25467B #3360AA

Accessibility & contrast

On white

14.13

#172B4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.49

#172B4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B4C

14.13:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B4C	#FFFFFF	#000000	##FFFFFF
##172B4C	1.00	14.13	1.49	14.13
#FFFFFF	14.13	1.00	21.00	1.00
#000000	1.49	21.00	1.00	21.00
##FFFFFF	14.13	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C2E4D

Deuteranopia (green-blind)

#15294B

Tritanopia (blue-blind)

#003237

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172b4c;
/* rgb */ color: rgb(23, 43, 76);
/* oklch */ color: oklch(29.1% 0.066 259.9);

Tailwind

colors: {
  custom: {
    50: '#5a637e',
    500: '#172b4c',
    950: '#000000',
  },
}

SCSS

$custom: #172b4c;
$custom-light: #5a637e;
$custom-dark: #000000;

JSON

{
  "hex": "#172b4c",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 76
  },
  "hsl": {
    "h": 217.358,
    "s": 53.535,
    "l": 19.412
  },
  "oklch": {
    "l": 0.29097,
    "c": 0.06594,
    "h": 259.9
  },
  "luminance": 0.02432
}

Semantic roles & 50–950 ramp

primary

#172B4C

secondary

#83683C

accent

#A64BDD

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#04050A

muted

#79797C

Preview Lab

Preview with #172B4C

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

Preview Lab → · Contrast checker → · Palette generator →