#170F43#170F43

#170F43 is a very dark, moderate blue. Relative luminance 0.009; OKLCH L 21.9% C 0.093 H 282.6°. Best body text is #FFFFFF at 17.71:1 contrast (WCAG AA passes).

Color values

HEX	#170F43
RGB	rgb(23, 15, 67)
HSL	hsl(249, 63%, 16%)
HSV	hsv(249, 78%, 26%)
CMYK	cmyk(65.7%, 77.6%, 0%, 73.7%)
CIE-LAB	lab(8.39, 21.33, -31.47)
CIE-LCH	lch(8.39, 38.02, 304.13°)
OKLab	oklab(21.94% 0.0203 -0.0906)
OKLCH	oklch(21.94% 0.093 282.6)
XYZ	xyz(1.5370, 0.9290, 5.4074)
Luminance	0.0093 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F43 #3B430F

analogous

#0F2143 #170F43 #310F43

triadic

#170F43 #43170F #0F4317

tetradic

#170F43 #430F21 #3B430F #0F4331

square

#170F43 #430F21 #3B430F #0F4331

split-complementary

#170F43 #43310F #21430F

monochromatic

#090619 #090619 #170F43 #281A75 #3925A7

Accessibility & contrast

On white

17.71

#170F43 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.19

#170F43 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F43

17.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F43	#FFFFFF	#000000	##FFFFFF
##170F43	1.00	17.71	1.19	17.71
#FFFFFF	17.71	1.00	21.00	1.00
#000000	1.19	21.00	1.00	21.00
##FFFFFF	17.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001A45

Deuteranopia (green-blind)

#001642

Tritanopia (blue-blind)

#011D27

Achromatopsia (no color)

#181818

Design tokens & code

CSS

--color: #170f43;
/* rgb */ color: rgb(23, 15, 67);
/* oklch */ color: oklch(21.9% 0.093 282.6);

Tailwind

colors: {
  custom: {
    50: '#5a4e78',
    500: '#170f43',
    950: '#000000',
  },
}

SCSS

$custom: #170f43;
$custom-light: #5a4e78;
$custom-dark: #000000;

JSON

{
  "hex": "#170f43",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 67
  },
  "hsl": {
    "h": 249.231,
    "s": 63.415,
    "l": 16.078
  },
  "oklch": {
    "l": 0.21939,
    "c": 0.09285,
    "h": 282.6
  },
  "luminance": 0.00929
}

Semantic roles & 50–950 ramp

primary

#170F43

secondary

#727D30

accent

#E641CD

background

#F5F4F7

surface

#E9E7ED

border

#C5C3C8

text

#040109

muted

#79777B

Preview Lab

Preview with #170F43

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

Preview Lab → · Contrast checker → · Palette generator →