Color
#300fa9
#300fa9rgb(48, 15, 169)hsl(253, 84%, 36%)oklch(0.363 0.213 277)Colors that go with #300fa9
Blue, Midnight Blue and Royal 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.
Blue #0000ff
shippedBlue is paired with #300fa9 in 5 real palettes, including Pepsi's brand system and Pfizer's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #300fa9 in 6 real palettes, including Blue Mono and Fintech Trust, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Royal Blue #4169e1
shippedRoyal Blue is paired with #300fa9 in 5 real palettes, including Nivea's brand system and Discord's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Steel Blue #4682b4
analogousshippedSteel Blue is #300fa9's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Olive Green #808000
complementaryOlive Green sits directly opposite #300fa9 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue Violet #8a2be2
analogousshippedBlue Violet is #300fa9's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #300fa9: softer than #000 and cool enough to feel like part of the same palette.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #300fa9 in 3 real palettes, including Peacock's brand system and Blue Mono, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #300fa9
Tints & shades
Harmonies
Contrast
| #300fa9 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 11.89:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.77:1 | 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 #300fa9 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
#300fa9 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 #300fa9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/300fa9-a99cc4-dfb84e-281f2d-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