Gemstone
Open in tool →Emerald, amethyst and ruby on velvet-black — the jewel-tone trio; the surface must be dark or the stones go plastic.
Color
#7e21ca
#7e21ca
hex
#7e21cargb
rgb(126, 33, 202)hsl
hsl(273, 72%, 46%)oklch
oklch(0.491 0.234 302.9)Closest name: Lilac Spring (#8822cc)Relative luminance 0.0979
Colors that go with #7e21ca
Denim, Olive 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
shippedDesigners have shipped Denim with #7e21ca: 4 real palettes, including Linkedin's brand system and Peacock, as the lead colour.
Olive Green #808000
complementaryOlive Green sits directly opposite #7e21ca 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 #7e21ca: softer than #000 and cool enough to feel like part of the same palette.
Medium Slate Blue #7b68ee
shippedMedium Slate Blue shows up next to #7e21ca in 3 real palettes, including ClickUp's brand system and monday.com's brand system, as the supporting colour.
Royal Blue #4169e1
analogousshippedRoyal Blue is #7e21ca's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
triadicshippedTeal completes a triad with #7e21ca — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sea Green #2e8b57
split-complementSea Green is a split-complement of #7e21ca: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Crimson #dc143c
shippedCrimson is paired with #7e21ca in two real palettes: Gemstone and Wells Fargo's brand system, as the accent.
Real palettes that use #7e21ca
Tints & shades
Harmonies
Contrast
| #7e21ca as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.1:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.96:1 | 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 #7e21ca as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
Fonts for this mood
#7e21ca reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #7e21ca
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #7e21ca and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/7e21ca-b79cc4-c4cb62-2d1f2d-eae9f1?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