#170F4D#170F4D

#170F4D is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.1% C 0.107 H 279.7°. Best body text is #FFFFFF at 17.33:1 contrast (WCAG AA passes).

Color values

HEX	#170F4D
RGB	rgb(23, 15, 77)
HSL	hsl(248, 67%, 18%)
HSV	hsv(248, 81%, 30%)
CMYK	cmyk(70.1%, 80.5%, 0%, 69.8%)
CIE-LAB	lab(9.48, 25.00, -36.67)
CIE-LCH	lch(9.48, 44.38, 304.29°)
OKLab	oklab(23.05% 0.018 -0.1058)
OKLCH	oklch(23.05% 0.107 279.7)
XYZ	xyz(1.8633, 1.0595, 7.1260)
Luminance	0.0106 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.65

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F4D #454D0F

analogous

#0F264D #170F4D #360F4D

triadic

#170F4D #4D170F #0F4D17

tetradic

#170F4D #4D0F26 #454D0F #0F4D36

square

#170F4D #4D0F26 #454D0F #0F4D36

split-complementary

#170F4D #4D360F #264D0F

monochromatic

#08051A #08051A #170F4D #261980 #3623B3

Accessibility & contrast

On white

17.33

#170F4D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#170F4D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F4D

17.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F4D	#FFFFFF	#000000	##FFFFFF
##170F4D	1.00	17.33	1.21	17.33
#FFFFFF	17.33	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D4F

Deuteranopia (green-blind)

#00184C

Tritanopia (blue-blind)

#00202D

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #170f4d;
/* rgb */ color: rgb(23, 15, 77);
/* oklch */ color: oklch(23.1% 0.107 279.7);

Tailwind

colors: {
  custom: {
    50: '#5d4e80',
    500: '#170f4d',
    950: '#000000',
  },
}

SCSS

$custom: #170f4d;
$custom-light: #5d4e80;
$custom-dark: #000000;

JSON

{
  "hex": "#170f4d",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 77
  },
  "hsl": {
    "h": 247.742,
    "s": 67.391,
    "l": 18.039
  },
  "oklch": {
    "l": 0.2305,
    "c": 0.10735,
    "h": 279.7
  },
  "luminance": 0.0106
}

Semantic roles & 50–950 ramp

primary

#170F4D

secondary

#7C8731

accent

#EA3ED4

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#05010A

muted

#79777C

Preview Lab

Preview with #170F4D

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

Preview Lab → · Contrast checker → · Palette generator →