Color
#4f309c
#4f309crgb(79, 48, 156)hsl(257, 53%, 40%)oklch(0.413 0.165 290.5)Colors that go with #4f309c
Royal Blue, Blue 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.
Royal Blue #4169e1
analogousshippedRoyal Blue is #4f309c's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shipped4 real palettes, including Zillow's brand system and Procter & Gamble's brand system put Blue beside #4f309c, as the lead colour.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #4f309c: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
shippedCrimson is paired with #4f309c in 6 real palettes, including Wells Fargo's brand system and Walgreens's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #4f309c: 7 real palettes, including Warbyparker's brand system and Slack's brand system, as the accent.
Midnight Blue #191970
shipped11 real palettes, including Kraken's brand system and Blue Mono put Midnight Blue beside #4f309c, as the lead colour.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #4f309c: 4 real palettes, including FedEx's brand system and Fintech Trust, as the accent.
Tomato #ff6347
shipped6 real palettes, including FedEx's brand system and dbt Labs's brand system put Tomato beside #4f309c, as the supporting colour.
Real palettes that use #4f309c
Tints & shades
Harmonies
Contrast
| #4f309c as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.39:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.24:1 | 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 #4f309c 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
#4f309c 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 #4f309c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/4f309c-ac9cc4-dfc24e-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