Color
#6366c5
#6366c5rgb(99, 102, 197)hsl(238, 46%, 58%)oklch(0.555 0.145 279.2)Colors that go with #6366c5
Charcoal, Sea Green and Amber 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 #6366c5: 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 #6366c5: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #6366c5 in 10 real palettes, including Wikipedia's brand system and Warner Bros.'s brand system, as the accent.
Blue #0000ff
shipped13 real palettes, including Pixar's brand system and Qualcomm's brand system put Blue beside #6366c5, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #6366c5: 12 real palettes, including Intel's brand system and Fintech Trust, as the lead colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #6366c5: 6 real palettes, including Coca-Cola's brand system and NBA's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #6366c5 in 17 real palettes, including Marvel's brand system and Netflix's brand system, as the accent.
Dark Orchid #9932cc
analogousshippedDark Orchid is #6366c5'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 #6366c5
Tints & shades
Harmonies
Contrast
| #6366c5 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.96:1 | pass | pass | fail |
|
Aaon black | 4.24:1 | 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 #6366c5 as the background.
Brands using this color
Fonts for this mood
#6366c5 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 #6366c5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/6366c5-9f9cc4-df944e-251f2d-e9edf1?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