Color

#305dc0

#305dc0
hex#305dc0
rgbrgb(48, 93, 192)
hslhsl(221, 60%, 47%)
oklchoklch(0.504 0.163 263.3)
Closest name: Denim (#1560bd)Relative luminance 0.1226

Colors that go with #305dc0

Charcoal, Sea Green 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#c09230

#30a5c0 · #4a30c0

#c0305d · #5dc030

Split-complementary

Open in tool →

#c04a30 · #a5c030

#c030a5 · #c09230 · #30c04a

Contrast

#305dc0 as textRatioAAAA largeAAAFix
Aaon white
6.08:1passpassfail
  • AAA: use #2b54ab as the text (7.1:1)
Aaon black
3.45:1failpassfail
  • AA: use #4773d1 as the text (4.64:1)
  • AAA: use #7495dc as the text (7.08:1)
  • AA: or shift the background to #dedede (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #305dc0 as the background.

Brands using this color

Fonts for this mood

#305dc0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #305dc0
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 #305dc0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/305dc0-9ca4c4-df6b4e-211f2d-e9eff1?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