Color
#5f09c8
#5f09c8rgb(95, 9, 200)hsl(267, 91%, 41%)oklch(0.44 0.241 292)Colors that go with #5f09c8
Royal Blue, Tomato and Olive Green 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.
Royal Blue #4169e1
analogousshippedRoyal Blue is #5f09c8's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Tomato #ff6347
shipped4 real palettes, including GitLab's brand system and dbt Labs's brand system put Tomato beside #5f09c8, as the lead colour.
Olive Green #808000
complementaryOlive Green sits directly opposite #5f09c8 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 #5f09c8: softer than #000 and cool enough to feel like part of the same palette.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #5f09c8: 3 real palettes, including Zillow's brand system and Unilever's brand system, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #5f09c8: 3 real palettes, including Peacock's brand system and Qualcomm's brand system, as the accent.
Crimson #dc143c
shippedCrimson is paired with #5f09c8 in 3 real palettes, including Gemstone and Wells Fargo's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #5f09c8: 3 real palettes, including Slack's brand system and Unilever's brand system, as the lead colour.
Real palettes that use #5f09c8
Tints & shades
Harmonies
Contrast
| #5f09c8 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 8.9:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.36:1 | 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 #5f09c8 as the background.
Brands using this color
Fonts for this mood
#5f09c8 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 #5f09c8 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/5f09c8-b39cc4-dfda4e-2c1f2d-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