Color

#08399b

#08399b
hex#08399b
rgbrgb(8, 57, 155)
hslhsl(220, 90%, 32%)
oklchoklch(0.386 0.167 262.2)
Closest name: Blue Hour (#0034ab)Relative luminance 0.0534

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9b6a08

#08839b · #21089b

#9b0839 · #399b08

Split-complementary

Open in tool →

#9b2108 · #839b08

#9b0883 · #9b6a08 · #089b21

Contrast

#08399b as textRatioAAAA largeAAAFix
Aaon white
10.15:1passpasspassPasses AAA — no fix needed.
Aaon black
2.07:1failfailfail
  • AA: use #2a6df4 as the text (4.59:1)
  • AAA: use #6495f7 as the text (7.18:1)
  • AA: or shift the background to #adadad (4.52:1)
  • AAA: or shift the background to #d9d9d9 (7.19:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #08399b as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#08399b reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #08399b
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 #08399b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/08399b-9ca5c4-df694e-211f2d-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