#170F55#170F55

#170F55 is a very dark, moderate blue. Relative luminance 0.012; OKLCH L 24.0% C 0.118 H 277.7°. Best body text is #FFFFFF at 16.99:1 contrast (WCAG AA passes).

Color values

HEX	#170F55
RGB	rgb(23, 15, 85)
HSL	hsl(247, 70%, 20%)
HSV	hsv(247, 82%, 33%)
CMYK	cmyk(72.9%, 82.4%, 0%, 66.7%)
CIE-LAB	lab(10.41, 27.88, -40.64)
CIE-LCH	lch(10.41, 49.28, 304.46°)
OKLab	oklab(23.98% 0.0159 -0.1174)
OKLCH	oklch(23.98% 0.118 277.7)
XYZ	xyz(2.1633, 1.1795, 8.7062)
Luminance	0.0118 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F55 #4D550F

analogous

#0F2A55 #170F55 #3A0F55

triadic

#170F55 #55170F #0F5517

tetradic

#170F55 #550F2A #4D550F #0F553A

square

#170F55 #550F2A #4D550F #0F553A

split-complementary

#170F55 #553A0F #2A550F

monochromatic

#07051A #090621 #170F55 #251889 #3321BD

Accessibility & contrast

On white

16.99

#170F55 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.24

#170F55 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F55

16.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F55	#FFFFFF	#000000	##FFFFFF
##170F55	1.00	16.99	1.24	16.99
#FFFFFF	16.99	1.00	21.00	1.00
#000000	1.24	21.00	1.00	21.00
##FFFFFF	16.99	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001F57

Deuteranopia (green-blind)

#001954

Tritanopia (blue-blind)

#002331

Achromatopsia (no color)

#1C1C1C

Design tokens & code

CSS

--color: #170f55;
/* rgb */ color: rgb(23, 15, 85);
/* oklch */ color: oklch(24.0% 0.118 277.7);

Tailwind

colors: {
  custom: {
    50: '#5f4f86',
    500: '#170f55',
    950: '#000000',
  },
}

SCSS

$custom: #170f55;
$custom-light: #5f4f86;
$custom-dark: #000000;

JSON

{
  "hex": "#170f55",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 85
  },
  "hsl": {
    "h": 246.857,
    "s": 70,
    "l": 19.608
  },
  "oklch": {
    "l": 0.23984,
    "c": 0.11848,
    "h": 277.7
  },
  "luminance": 0.0118
}

Semantic roles & 50–950 ramp

primary

#170F55

secondary

#848F31

accent

#ED3BD8

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05020B

muted

#79787C

Preview Lab

Preview with #170F55

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

Preview Lab → · Contrast checker → · Palette generator →