Color

#00178a

#00178a
hex#00178a
rgbrgb(0, 23, 138)
hslhsl(230, 100%, 27%)
oklchoklch(0.307 0.184 264.1)
Closest name: darkblue (#00008b)Relative luminance 0.0245

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8a7300

#005c8a · #2e008a

#8a0017 · #178a00

Split-complementary

Open in tool →

#8a2e00 · #5c8a00

#8a005c · #8a7300 · #008a2e

Contrast

#00178a as textRatioAAAA largeAAAFix
Aaon white
14.1:1passpasspassPasses AAA — no fix needed.
Aaon black
1.49:1failfailfail
  • AA: use #4766ff as the text (4.61:1)
  • AAA: use #7a90ff as the text (7.26:1)
  • AA: or shift the background to #949494 (4.65:1)
  • AAA: or shift the background to #b8b8b8 (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #00178a as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#00178a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #00178a
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 #00178a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/00178a-9c9ec4-df814e-231f2d-e9eef1?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