#172B40#172B40

#172B40 is a dark, muted cyan. Relative luminance 0.023; OKLCH L 28.3% C 0.047 H 250.9°. Best body text is #FFFFFF at 14.42:1 contrast (WCAG AA passes).

Color values

HEX	#172B40
RGB	rgb(23, 43, 64)
HSL	hsl(211, 47%, 17%)
HSV	hsv(211, 64%, 25%)
CMYK	cmyk(64.1%, 32.8%, 0%, 74.9%)
CIE-LAB	lab(16.89, -0.54, -15.74)
CIE-LCH	lch(16.89, 15.75, 268.03°)
OKLab	oklab(28.31% -0.0153 -0.0443)
OKLCH	oklch(28.31% 0.047 250.9)
XYZ	xyz(2.1423, 2.2799, 5.1767)
Luminance	0.0228 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#172B40 #402C17

analogous

#174040 #172B40 #181740

triadic

#172B40 #40172B #2B4017

tetradic

#172B40 #401740 #402C17 #174018

square

#172B40 #401740 #402C17 #174018

split-complementary

#172B40 #401817 #404017

monochromatic

#080F17 #080F17 #172B40 #27496D #37679A

Accessibility & contrast

On white

14.42

#172B40 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.46

#172B40 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #172B40

14.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##172B40	#FFFFFF	#000000	##FFFFFF
##172B40	1.00	14.42	1.46	14.42
#FFFFFF	14.42	1.00	21.00	1.00
#000000	1.46	21.00	1.00	21.00
##FFFFFF	14.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#222C41

Deuteranopia (green-blind)

#1D2840

Tritanopia (blue-blind)

#003032

Achromatopsia (no color)

#2A2A2A

Design tokens & code

CSS

--color: #172b40;
/* rgb */ color: rgb(23, 43, 64);
/* oklch */ color: oklch(28.3% 0.047 250.9);

Tailwind

colors: {
  custom: {
    50: '#586475',
    500: '#172b40',
    950: '#000000',
  },
}

SCSS

$custom: #172b40;
$custom-light: #586475;
$custom-dark: #000000;

JSON

{
  "hex": "#172b40",
  "rgb": {
    "r": 23,
    "g": 43,
    "b": 64
  },
  "hsl": {
    "h": 210.732,
    "s": 47.126,
    "l": 17.059
  },
  "oklch": {
    "l": 0.28306,
    "c": 0.04685,
    "h": 250.9
  },
  "luminance": 0.0228
}

Semantic roles & 50–950 ramp

primary

#172B40

secondary

#775A3C

accent

#9651D7

background

#F5F5F7

surface

#E9EAED

border

#C5C6C8

text

#030508

muted

#78797B

Preview Lab

Preview with #172B40

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

Preview Lab → · Contrast checker → · Palette generator →