Color
#0505cc
#0505ccrgb(5, 5, 204)hsl(240, 95%, 41%)oklch(0.385 0.262 264.6)Colors that go with #0505cc
Olive Green, Midnight Blue and Sienna 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.
Olive Green #808000
complementaryOlive Green sits directly opposite #0505cc on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Midnight Blue #191970
shippedMidnight Blue is paired with #0505cc in 3 real palettes, including Monzo's brand system and Blue Mono, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Sienna #a0522d
split-complementSienna is a split-complement of #0505cc: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #0505cc: softer than #000 and cool enough to feel like part of the same palette.
Slate Gray #708090
shippedSlate Gray is paired with #0505cc in two real palettes: Ink & Paper and Campus, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Steel Blue #4682b4
analogousshippedSteel Blue is #0505cc's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #0505cc: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Forest Green #228b22
triadicForest Green completes a triad with #0505cc — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #0505cc
Tints & shades
Harmonies
Contrast
| #0505cc as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 11.05:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.9:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0505cc 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
#0505cc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #0505cc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/0505cc-a19cc4-df994e-251f2d-e9edf1?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md