#172B4A#172B4A

#172B4A is a dark, moderate blue. Relative luminance 0.024; OKLCH L 29.0% C 0.063 H 258.9°. Best body text is #FFFFFF at 14.18:1 contrast (WCAG AA passes).

Color values

HEX	#172B4A
RGB	rgb(23, 43, 74)
HSL	hsl(216, 53%, 19%)
HSV	hsv(216, 69%, 29%)
CMYK	cmyk(68.9%, 41.9%, 0%, 71%)
CIE-LAB	lab(17.48, 3.45, -21.67)
CIE-LCH	lch(17.48, 21.95, 279.04°)
OKLab	oklab(28.96% -0.0121 -0.0615)
OKLCH	oklch(28.96% 0.063 258.9)
XYZ	xyz(2.4528, 2.4041, 6.8120)
Luminance	0.0240 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B4A #4A3617

analogous

#17454A #172B4A #1D174A

triadic

#172B4A #4A172B #2B4A17

tetradic

#172B4A #4A1745 #4A3617 #174A1D

square

#172B4A #4A1745 #4A3617 #174A1D

split-complementary

#172B4A #4A1D17 #454A17

monochromatic

#070E17 #08101B #172B4A #264679 #3461A7

Accessibility & contrast

On white

14.18

#172B4A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.48

#172B4A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B4A

14.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B4A	#FFFFFF	#000000	##FFFFFF
##172B4A	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)

#1E2D4B

Deuteranopia (green-blind)

#172949

Tritanopia (blue-blind)

#003237

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #172b4a;
/* rgb */ color: rgb(23, 43, 74);
/* oklch */ color: oklch(29.0% 0.063 258.9);

Tailwind

colors: {
  custom: {
    50: '#5a647c',
    500: '#172b4a',
    950: '#000000',
  },
}

SCSS

$custom: #172b4a;
$custom-light: #5a647c;
$custom-dark: #000000;

JSON

{
  "hex": "#172b4a",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 74
  },
  "hsl": {
    "h": 216.471,
    "s": 52.577,
    "l": 19.02
  },
  "oklch": {
    "l": 0.28957,
    "c": 0.06271,
    "h": 258.9
  },
  "luminance": 0.02404
}

Semantic roles & 50–950 ramp

primary

#172B4A

secondary

#81663C

accent

#A34CDC

background

#F5F5F7

surface

#E9EAEE

border

#C5C6C9

text

#040509

muted

#79797B

Preview Lab

Preview with #172B4A

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

Preview Lab → · Contrast checker → · Palette generator →