Color
#42005b
#42005brgb(66, 0, 91)hsl(284, 100%, 18%)oklch(0.287 0.143 312.9)Colors that go with #42005b
Denim, Forest Green and Charcoal 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.
Denim #1560bd
shippedDenim is paired with #42005b in 4 real palettes, including Discover's brand system and Heinz's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Forest Green #228b22
complementaryForest Green sits directly opposite #42005b 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 #42005b: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
split-complementSea Green is a split-complement of #42005b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Olive Green #808000
split-complementOlive Green is a split-complement of #42005b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Coral #ff7f50
shippedCoral is paired with #42005b in two real palettes: Sketch's brand system and Dusk Gradient, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #42005b in two real palettes: Blue Mono and Peacock's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #42005b in two real palettes: Casper Sleep's brand system and Marvel's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #42005b
Tints & shades
Harmonies
Contrast
| #42005b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 15.19:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.38:1 | 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 #42005b as the background.
Brands using this color
Fonts for this mood
#42005b 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 #42005b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/42005b-bc9fc1-b1cb62-2d1f2b-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