#170F5B#170F5B

#170F5B is a very dark, vivid blue. Relative luminance 0.013; OKLCH L 24.7% C 0.127 H 276.5°. Best body text is #FFFFFF at 16.72:1 contrast (WCAG AA passes).

Color values

HEX	#170F5B
RGB	rgb(23, 15, 91)
HSL	hsl(246, 72%, 21%)
HSV	hsv(246, 84%, 36%)
CMYK	cmyk(74.7%, 83.5%, 0%, 64.3%)
CIE-LAB	lab(11.13, 30.00, -43.51)
CIE-LCH	lch(11.13, 52.85, 304.59°)
OKLab	oklab(24.7% 0.0143 -0.1258)
OKLCH	oklch(24.7% 0.127 276.5)
XYZ	xyz(2.4119, 1.2789, 10.0153)
Luminance	0.0128 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F5B #535B0F

analogous

#0F2D5B #170F5B #3D0F5B

triadic

#170F5B #5B170F #0F5B17

tetradic

#170F5B #5B0F2D #535B0F #0F5B3D

square

#170F5B #5B0F2D #535B0F #0F5B3D

split-complementary

#170F5B #5B3D0F #2D5B0F

monochromatic

#07041A #0A0626 #170F5B #241890 #3220C4

Accessibility & contrast

On white

16.72

#170F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.26

#170F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F5B

16.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F5B	#FFFFFF	#000000	##FFFFFF
##170F5B	1.00	16.72	1.26	16.72
#FFFFFF	16.72	1.00	21.00	1.00
#000000	1.26	21.00	1.00	21.00
##FFFFFF	16.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00215D

Deuteranopia (green-blind)

#001A5A

Tritanopia (blue-blind)

#002635

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #170f5b;
/* rgb */ color: rgb(23, 15, 91);
/* oklch */ color: oklch(24.7% 0.127 276.5);

Tailwind

colors: {
  custom: {
    50: '#604f8a',
    500: '#170f5b',
    950: '#000000',
  },
}

SCSS

$custom: #170f5b;
$custom-light: #604f8a;
$custom-dark: #000000;

JSON

{
  "hex": "#170f5b",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 91
  },
  "hsl": {
    "h": 246.316,
    "s": 71.698,
    "l": 20.784
  },
  "oklch": {
    "l": 0.24704,
    "c": 0.12657,
    "h": 276.5
  },
  "luminance": 0.01279
}

Semantic roles & 50–950 ramp

primary

#170F5B

secondary

#8A9531

accent

#EE39DB

background

#F6F4F8

surface

#EBE7F0

border

#C6C3CB

text

#06020C

muted

#7A787D

Preview Lab

Preview with #170F5B

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

Preview Lab → · Contrast checker → · Palette generator →