Color

#0398ba

#0398ba
hex#0398ba
rgbrgb(3, 152, 186)
hslhsl(191, 97%, 37%)
oklchoklch(0.63 0.115 221.2)
Closest name: Blue Ocean (#009dc4)Relative luminance 0.2602

Colors that go with #0398ba

Charcoal, Crimson and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Real palettes that use #0398ba

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ba2403

#03ba80 · #033dba

#ba0398 · #98ba03

Split-complementary

Open in tool →

#ba033d · #ba8003

#8003ba · #ba2403 · #3dba03

Contrast

#0398ba as textRatioAAAA largeAAAFix
Aaon white
3.38:1failpassfail
  • AA: use #02809c as the text (4.59:1)
  • AAA: use #025f74 as the text (7.26:1)
  • AA: or shift the background to #242424 (4.59:1)
Aaon black
6.2:1passpassfail
  • AAA: use #03a5c9 as the text (7.23:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0398ba 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

#0398ba reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0398ba
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

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

analyze #0398ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0398ba-a2b6be-df4e7a-1f252d-e9f1ef?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