Color
#604b9b
#604b9brgb(96, 75, 155)hsl(256, 35%, 45%)oklch(0.474 0.125 293.1)Colors that go with #604b9b
Charcoal, Sea Green and 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #604b9b: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
split-complementshippedSea Green is a split-complement of #604b9b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Blue #0000ff
shipped6 real palettes, including Pixar's brand system and Tesco's brand system put Blue beside #604b9b, as the accent.
Crimson #dc143c
shippedCrimson is paired with #604b9b in 12 real palettes, including Wells Fargo's brand system and Walgreens's brand system, as the lead colour.
Midnight Blue #191970
shipped17 real palettes, including FIFA's brand system and Paramount+'s brand system put Midnight Blue beside #604b9b, as the lead colour.
Red #ff0000
shippedRed is paired with #604b9b in 5 real palettes, including Walgreens's brand system and L'Oréal's brand system, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #604b9b in 12 real palettes, including Fivetran blue's brand system and Guinness's brand system, as the lead colour.
Steel Blue #4682b4
analogousshippedSteel Blue is #604b9b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Real palettes that use #604b9b
Tints & shades
Harmonies
Contrast
| #604b9b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.05:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.98:1 | 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 #604b9b as the background.
Brands using this color
Fonts for this mood
#604b9b reads as cool, modern. 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 #604b9b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/604b9b-ab9cc4-dfbf4e-291f2d-e9ebf1?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