#170F51#170F51

#170F51 is a very dark, moderate blue. Relative luminance 0.011; OKLCH L 23.5% C 0.113 H 278.7°. Best body text is #FFFFFF at 17.16:1 contrast (WCAG AA passes).

Color values

HEX	#170F51
RGB	rgb(23, 15, 81)
HSL	hsl(247, 69%, 19%)
HSV	hsv(247, 81%, 32%)
CMYK	cmyk(71.6%, 81.5%, 0%, 68.2%)
CIE-LAB	lab(9.94, 26.45, -38.67)
CIE-LCH	lch(9.94, 46.85, 304.37°)
OKLab	oklab(23.51% 0.017 -0.1117)
OKLCH	oklch(23.51% 0.113 278.7)
XYZ	xyz(2.0089, 1.1177, 7.8929)
Luminance	0.0112 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#170F51 #49510F

analogous

#0F2851 #170F51 #380F51

triadic

#170F51 #51170F #0F5117

tetradic

#170F51 #510F28 #49510F #0F5138

square

#170F51 #510F28 #49510F #0F5138

split-complementary

#170F51 #51380F #28510F

monochromatic

#07051A #08051D #170F51 #261985 #3422B8

Accessibility & contrast

On white

17.16

#170F51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.22

#170F51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #170F51

17.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##170F51	#FFFFFF	#000000	##FFFFFF
##170F51	1.00	17.16	1.22	17.16
#FFFFFF	17.16	1.00	21.00	1.00
#000000	1.22	21.00	1.00	21.00
##FFFFFF	17.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#001E53

Deuteranopia (green-blind)

#001950

Tritanopia (blue-blind)

#00222F

Achromatopsia (no color)

#1B1B1B

Design tokens & code

CSS

--color: #170f51;
/* rgb */ color: rgb(23, 15, 81);
/* oklch */ color: oklch(23.5% 0.113 278.7);

Tailwind

colors: {
  custom: {
    50: '#5e4e83',
    500: '#170f51',
    950: '#000000',
  },
}

SCSS

$custom: #170f51;
$custom-light: #5e4e83;
$custom-dark: #000000;

JSON

{
  "hex": "#170f51",
  "rgb": {
    "r": 23,
    "g": 15,
    "b": 81
  },
  "hsl": {
    "h": 247.273,
    "s": 68.75,
    "l": 18.824
  },
  "oklch": {
    "l": 0.23513,
    "c": 0.11297,
    "h": 278.7
  },
  "luminance": 0.01118
}

Semantic roles & 50–950 ramp

primary

#170F51

secondary

#808B31

accent

#EC3CD6

background

#F5F4F8

surface

#EAE7EF

border

#C6C3CA

text

#05020B

muted

#79787C

Preview Lab

Preview with #170F51

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

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