Color
#3f0665
#3f0665rgb(63, 6, 101)hsl(276, 89%, 21%)oklch(0.297 0.146 305.3)Colors that go with #3f0665
Crimson, Denim and Royal Blue 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.
Crimson #dc143c
shippedCrimson is paired with #3f0665 in 4 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #3f0665: 5 real palettes, including Bank of America's brand system and Discover's brand system, as the accent.
Royal Blue #4169e1
analogousshippedRoyal Blue is #3f0665's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Olive Green #808000
complementaryOlive Green sits directly opposite #3f0665 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #3f0665: softer than #000 and cool enough to feel like part of the same palette.
Tomato #ff6347
shipped3 real palettes, including FedEx's brand system and dbt Labs's brand system put Tomato beside #3f0665, as the supporting colour.
Teal #008080
triadicshippedTeal completes a triad with #3f0665 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sea Green #2e8b57
split-complementSea Green is a split-complement of #3f0665: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #3f0665
Tints & shades
Harmonies
Contrast
| #3f0665 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 14.73:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.43:1 | 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 #3f0665 as the background.
Brands using this color
Fonts for this mood
#3f0665 reads as cool, vivid, dark. 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 #3f0665 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3f0665-b99cc4-bfcb62-2d1f2d-eae9f1?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