Color

#17283f

#17283f
hex#17283f
rgbrgb(23, 40, 63)
hslhsl(215, 47%, 17%)
oklchoklch(0.274 0.049 256.3)
Closest name: Eternal Darkness (#1c2841)Relative luminance 0.0206

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#402f17

#173c40 · #1a1740

#401728 · #284017

Split-complementary

Open in tool →

#401a17 · #3c4017

#40173c · #402f17 · #17401a

Contrast

#17283f as textRatioAAAA largeAAAFix
Aaon white
14.88:1passpasspassPasses AAA — no fix needed.
Aaon black
1.41:1failfailfail
  • AA: use #4476bb as the text (4.55:1)
  • AAA: use #7197cc as the text (7:1)
  • AA: or shift the background to #8f8f8f (4.6:1)
  • AAA: or shift the background to #b3b3b3 (7.09:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #17283f as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#17283f reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #17283f
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #17283f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/17283f-9ca8c4-df5d4e-201f2d-e9f0f1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md