#170F42#170F42

#170F42 is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.8% C 0.091 H 282.9°. Best body text is #FFFFFF at 17.75:1 contrast (WCAG AA passes).

Color values

HEX	#170F42
RGB	rgb(23, 15, 66)
HSL	hsl(249, 63%, 16%)
HSV	hsv(249, 77%, 26%)
CMYK	cmyk(65.2%, 77.3%, 0%, 74.1%)
CIE-LAB	lab(8.28, 20.96, -30.93)
CIE-LCH	lch(8.28, 37.37, 304.12°)
OKLab	oklab(21.83% 0.0205 -0.089)
OKLCH	oklch(21.83% 0.091 282.9)
XYZ	xyz(1.5072, 0.9171, 5.2508)
Luminance	0.0092 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F42 #3A420F

analogous

#0F2042 #170F42 #300F42

triadic

#170F42 #42170F #0F4217

tetradic

#170F42 #420F20 #3A420F #0F4230

square

#170F42 #420F20 #3A420F #0F4230

split-complementary

#170F42 #42300F #20420F

monochromatic

#090619 #090619 #170F42 #281A74 #3A26A6

Accessibility & contrast

On white

17.75

#170F42 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.18

#170F42 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F42

17.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F42	#FFFFFF	#000000	##FFFFFF
##170F42	1.00	17.75	1.18	17.75
#FFFFFF	17.75	1.00	21.00	1.00
#000000	1.18	21.00	1.00	21.00
##FFFFFF	17.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A44

Deuteranopia (green-blind)

#001641

Tritanopia (blue-blind)

#021C27

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #170f42;
/* rgb */ color: rgb(23, 15, 66);
/* oklch */ color: oklch(21.8% 0.091 282.9);

Tailwind

colors: {
  custom: {
    50: '#5a4e77',
    500: '#170f42',
    950: '#000000',
  },
}

SCSS

$custom: #170f42;
$custom-light: #5a4e77;
$custom-dark: #000000;

JSON

{
  "hex": "#170f42",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 66
  },
  "hsl": {
    "h": 249.412,
    "s": 62.963,
    "l": 15.882
  },
  "oklch": {
    "l": 0.21832,
    "c": 0.09136,
    "h": 282.9
  },
  "luminance": 0.00917
}

Semantic roles & 50–950 ramp

primary

#170F42

secondary

#717C30

accent

#E642CC

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040109

muted

#79777B

Preview Lab

Preview with #170F42

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

Preview Lab → · Contrast checker → · Palette generator →