Color
#664ca4
#664ca4rgb(102, 76, 164)hsl(258, 37%, 47%)oklch(0.487 0.137 294.4)Colors that go with #664ca4
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 #664ca4: 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 #664ca4: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Blue #0000ff
shipped5 real palettes, including Pixar's brand system and Tesco's brand system put Blue beside #664ca4, as the accent.
Crimson #dc143c
shippedCrimson is paired with #664ca4 in 12 real palettes, including Wells Fargo's brand system and Marvel's brand system, as the lead colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #664ca4: 4 real palettes, including HashiCorp's brand system and Apple's brand system, as the supporting colour.
Midnight Blue #191970
shipped16 real palettes, including Marvel's brand system and Paramount+'s brand system put Midnight Blue beside #664ca4, as the supporting colour.
Red #ff0000
shippedRed is paired with #664ca4 in 6 real palettes, including L'Oréal's brand system and Walgreens's brand system, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #664ca4 in 8 real palettes, including Fivetran blue's brand system and Guinness's brand system, as the lead colour.
Real palettes that use #664ca4
Tints & shades
Harmonies
Contrast
| #664ca4 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.7:1 | pass | pass | fail |
|
Aaon black | 3.13:1 | fail | pass | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #664ca4 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
#664ca4 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 #664ca4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/664ca4-ad9cc4-dfc44e-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