#170C51#170C51

#170C51 is a very dark, moderate blue. Relative luminance 0.010; OKLCH L 23.1% C 0.116 H 279.4°. Best body text is #FFFFFF at 17.39:1 contrast (WCAG AA passes).

Color values

HEX	#170C51
RGB	rgb(23, 12, 81)
HSL	hsl(250, 74%, 18%)
HSV	hsv(250, 85%, 32%)
CMYK	cmyk(71.6%, 85.2%, 0%, 68.2%)
CIE-LAB	lab(9.31, 28.23, -39.70)
CIE-LCH	lch(9.31, 48.72, 305.41°)
OKLab	oklab(23.08% 0.019 -0.1146)
OKLCH	oklch(23.08% 0.116 279.4)
XYZ	xyz(1.9695, 1.0390, 7.8797)
Luminance	0.0104 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170C51 #46510C

analogous

#0C2351 #170C51 #390C51

triadic

#170C51 #51170C #0C5117

tetradic

#170C51 #510C23 #46510C #0C5139

square

#170C51 #510C23 #46510C #0C5139

split-complementary

#170C51 #51390C #23510C

monochromatic

#08041B #08041C #170C51 #261486 #351CBC

Accessibility & contrast

On white

17.39

#170C51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.21

#170C51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170C51

17.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170C51	#FFFFFF	#000000	##FFFFFF
##170C51	1.00	17.39	1.21	17.39
#FFFFFF	17.39	1.00	21.00	1.00
#000000	1.21	21.00	1.00	21.00
##FFFFFF	17.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001D53

Deuteranopia (green-blind)

#001750

Tritanopia (blue-blind)

#00212E

Achromatopsia (no color)

#1A1A1A

Design tokens & code

CSS

--color: #170c51;
/* rgb */ color: rgb(23, 12, 81);
/* oklch */ color: oklch(23.1% 0.116 279.4);

Tailwind

colors: {
  custom: {
    50: '#5e4d83',
    500: '#170c51',
    950: '#000000',
  },
}

SCSS

$custom: #170c51;
$custom-light: #5e4d83;
$custom-dark: #000000;

JSON

{
  "hex": "#170c51",
  "rgb": {
    "r": 23,
    "g": 12,
    "b": 81
  },
  "hsl": {
    "h": 249.565,
    "s": 74.194,
    "l": 18.235
  },
  "oklch": {
    "l": 0.23075,
    "c": 0.1162,
    "h": 279.4
  },
  "luminance": 0.01039
}

Semantic roles & 50–950 ramp

primary

#170C51

secondary

#7D8C2C

accent

#F137D3

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05010B

muted

#79777C

Preview Lab

Preview with #170C51

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

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