Color
#3f005b
#3f005brgb(63, 0, 91)hsl(282, 100%, 18%)oklch(0.282 0.142 310.8)Colors that go with #3f005b
Charcoal, Denim and Forest Green 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #3f005b: softer than #000 and cool enough to feel like part of the same palette.
Denim #1560bd
shippedDesigners have shipped Denim with #3f005b: 5 real palettes, including Discover's brand system and Bank of America's brand system, as the supporting colour.
Forest Green #228b22
complementaryForest Green sits directly opposite #3f005b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped3 real palettes, including Sketch's brand system and Penpot's brand system put Blue beside #3f005b, as the accent.
Crimson #dc143c
shippedCrimson is paired with #3f005b in 3 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #3f005b in 3 real palettes, including Discord's brand system and Telehealth, as the lead colour.
Tomato #ff6347
shipped3 real palettes, including FedEx's brand system and Golden Hour put Tomato beside #3f005b, as the supporting colour.
Teal #008080
triadicshippedTeal completes a triad with #3f005b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #3f005b
Tints & shades
Harmonies
Contrast
| #3f005b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 15.41:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.36:1 | 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 #3f005b as the background.
Brands using this color
Fonts for this mood
#3f005b 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 #3f005b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3f005b-ba9fc1-b4cb62-2d1f2b-ebe9f1?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