#172B4B#172B4B

#172B4B is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.0% C 0.064 H 259.4°. Best body text is #FFFFFF at 14.15:1 contrast (WCAG AA passes).

Color values

HEX	#172B4B
RGB	rgb(23, 43, 75)
HSL	hsl(217, 53%, 19%)
HSV	hsv(217, 69%, 29%)
CMYK	cmyk(69.3%, 42.7%, 0%, 70.6%)
CIE-LAB	lab(17.54, 3.86, -22.25)
CIE-LCH	lch(17.54, 22.59, 279.83°)
OKLab	oklab(29.03% -0.0118 -0.0632)
OKLCH	oklch(29.03% 0.064 259.4)
XYZ	xyz(2.4868, 2.4177, 6.9909)
Luminance	0.0242 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B4B #4B3717

analogous

#17454B #172B4B #1D174B

triadic

#172B4B #4B172B #2B4B17

tetradic

#172B4B #4B1745 #4B3717 #174B1D

square

#172B4B #4B1745 #4B3717 #174B1D

split-complementary

#172B4B #4B1D17 #454B17

monochromatic

#070D17 #09101C #172B4B #25467A #3461A9

Accessibility & contrast

On white

14.15

#172B4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#172B4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B4B

14.15:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B4B	#FFFFFF	#000000	##FFFFFF
##172B4B	1.00	14.15	1.48	14.15
#FFFFFF	14.15	1.00	21.00	1.00
#000000	1.48	21.00	1.00	21.00
##FFFFFF	14.15	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D2E4C

Deuteranopia (green-blind)

#16294A

Tritanopia (blue-blind)

#003237

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172b4b;
/* rgb */ color: rgb(23, 43, 75);
/* oklch */ color: oklch(29.0% 0.064 259.4);

Tailwind

colors: {
  custom: {
    50: '#5a647d',
    500: '#172b4b',
    950: '#000000',
  },
}

SCSS

$custom: #172b4b;
$custom-light: #5a647d;
$custom-dark: #000000;

JSON

{
  "hex": "#172b4b",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 75
  },
  "hsl": {
    "h": 216.923,
    "s": 53.061,
    "l": 19.216
  },
  "oklch": {
    "l": 0.29026,
    "c": 0.06433,
    "h": 259.4
  },
  "luminance": 0.02418
}

Semantic roles & 50–950 ramp

primary

#172B4B

secondary

#82673C

accent

#A54BDC

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#040509

muted

#79797B

Preview Lab

Preview with #172B4B

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

Preview Lab → · Contrast checker → · Palette generator →