#170C53#170C53

#170C53 is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.3% C 0.119 H 278.9°. Best body text is #FFFFFF at 17.30:1 contrast (WCAG AA passes).

Color values

HEX	#170C53
RGB	rgb(23, 12, 83)
HSL	hsl(249, 75%, 19%)
HSV	hsv(249, 86%, 33%)
CMYK	cmyk(72.3%, 85.5%, 0%, 67.5%)
CIE-LAB	lab(9.56, 28.92, -40.67)
CIE-LCH	lch(9.56, 49.90, 305.42°)
OKLab	oklab(23.32% 0.0184 -0.1175)
OKLCH	oklch(23.32% 0.119 278.9)
XYZ	xyz(2.0457, 1.0695, 8.2806)
Luminance	0.0107 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170C53 #48530C

analogous

#0C2453 #170C53 #3A0C53

triadic

#170C53 #53170C #0C5317

tetradic

#170C53 #530C24 #48530C #0C533A

square

#170C53 #530C24 #48530C #0C533A

split-complementary

#170C53 #533A0C #24530C

monochromatic

#07041B #08041E #170C53 #261488 #351BBE

Accessibility & contrast

On white

17.30

#170C53 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#170C53 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170C53

17.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170C53	#FFFFFF	#000000	##FFFFFF
##170C53	1.00	17.30	1.21	17.30
#FFFFFF	17.30	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D55

Deuteranopia (green-blind)

#001852

Tritanopia (blue-blind)

#00212F

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #170c53;
/* rgb */ color: rgb(23, 12, 83);
/* oklch */ color: oklch(23.3% 0.119 278.9);

Tailwind

colors: {
  custom: {
    50: '#5f4d84',
    500: '#170c53',
    950: '#000000',
  },
}

SCSS

$custom: #170c53;
$custom-light: #5f4d84;
$custom-dark: #000000;

JSON

{
  "hex": "#170c53",
  "rgb": {
    "r": 23,
    "g": 12,
    "b": 83
  },
  "hsl": {
    "h": 249.296,
    "s": 74.737,
    "l": 18.627
  },
  "oklch": {
    "l": 0.23318,
    "c": 0.11889,
    "h": 278.9
  },
  "luminance": 0.0107
}

Semantic roles & 50–950 ramp

primary

#170C53

secondary

#7F8E2D

accent

#F136D4

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05010B

muted

#79777C

Preview Lab

Preview with #170C53

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

Preview Lab → · Contrast checker → · Palette generator →