#170F4E#170F4E

#170F4E is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.2% C 0.109 H 279.4°. Best body text is #FFFFFF at 17.29:1 contrast (WCAG AA passes).

Color values

HEX	#170F4E
RGB	rgb(23, 15, 78)
HSL	hsl(248, 68%, 18%)
HSV	hsv(248, 81%, 31%)
CMYK	cmyk(70.5%, 80.8%, 0%, 69.4%)
CIE-LAB	lab(9.59, 25.37, -37.18)
CIE-LCH	lch(9.59, 45.01, 304.31°)
OKLab	oklab(23.17% 0.0178 -0.1073)
OKLCH	oklch(23.17% 0.109 279.4)
XYZ	xyz(1.8989, 1.0737, 7.3134)
Luminance	0.0107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 5.79

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F4E #464E0F

analogous

#0F264E #170F4E #360F4E

triadic

#170F4E #4E170F #0F4E17

tetradic

#170F4E #4E0F26 #464E0F #0F4E36

square

#170F4E #4E0F26 #464E0F #0F4E36

split-complementary

#170F4E #4E360F #264E0F

monochromatic

#08051A #08051B #170F4E #261981 #3523B5

Accessibility & contrast

On white

17.29

#170F4E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#170F4E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F4E

17.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F4E	#FFFFFF	#000000	##FFFFFF
##170F4E	1.00	17.29	1.21	17.29
#FFFFFF	17.29	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D50

Deuteranopia (green-blind)

#00184D

Tritanopia (blue-blind)

#00212D

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #170f4e;
/* rgb */ color: rgb(23, 15, 78);
/* oklch */ color: oklch(23.2% 0.109 279.4);

Tailwind

colors: {
  custom: {
    50: '#5d4e80',
    500: '#170f4e',
    950: '#000000',
  },
}

SCSS

$custom: #170f4e;
$custom-light: #5d4e80;
$custom-dark: #000000;

JSON

{
  "hex": "#170f4e",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 78
  },
  "hsl": {
    "h": 247.619,
    "s": 67.742,
    "l": 18.235
  },
  "oklch": {
    "l": 0.23165,
    "c": 0.10876,
    "h": 279.4
  },
  "luminance": 0.01074
}

Semantic roles & 50–950 ramp

primary

#170F4E

secondary

#7D8831

accent

#EB3DD5

background

#F5F4F7

surface

#E9E7EE

border

#C5C3C9

text

#05010A

muted

#79777C

Preview Lab

Preview with #170F4E

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

Preview Lab → · Contrast checker → · Palette generator →