Color
#721fef
#721fefrgb(114, 31, 239)hsl(264, 87%, 53%)oklch(0.511 0.268 291.1)Colors that go with #721fef
Deep Sky Blue, Olive Green and Cornflower 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.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #721fef: 4 real palettes, including Render's brand system and Kraken's brand system, as the supporting colour.
Olive Green #808000
complementaryOlive Green sits directly opposite #721fef on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #721fef: 3 real palettes, including Mastodon hosted on mastodon.social's brand system and Qualcomm's brand system, as the supporting colour.
Medium Slate Blue #7b68ee
shippedMedium Slate Blue shows up next to #721fef in 3 real palettes, including ClickUp's brand system and Stripe's brand system, as the supporting colour.
Midnight Blue #191970
shipped3 real palettes, including Kraken's brand system and Lavender Haze put Midnight Blue beside #721fef, as the lead colour.
Forest Green #228b22
split-complementForest Green is a split-complement of #721fef: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Royal Blue #4169e1
analogousshippedRoyal Blue is #721fef's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Charcoal #36454f
neutralCharcoal is the text near-black for #721fef: softer than #000 and cool enough to feel like part of the same palette.
Real palettes that use #721fef
Tints & shades
Harmonies
Contrast
| #721fef as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.65:1 | pass | pass | fail |
|
Aaon black | 3.16:1 | 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 #721fef as the background.
Brands using this color
Fonts for this mood
#721fef reads as cool, vivid, technical. 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 #721fef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/721fef-b19cc4-dfd34e-2b1f2d-e9eaf1?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