Color
#300f62
#300f62rgb(48, 15, 98)hsl(264, 73%, 22%)oklch(0.281 0.133 294)Colors that go with #300f62
Charcoal, Royal Blue and Cadet 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #300f62: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #300f62's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #300f62: 6 real palettes, including SoFi's brand system and Open House, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #300f62: 6 real palettes, including Blue Mono and Purina Pro Plan's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #300f62 in 5 real palettes, including Casper Sleep's brand system and Nintendo's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #300f62: 13 real palettes, including Bank of America's brand system and Discover's brand system, as the accent.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #300f62: 5 real palettes, including Glacier and First Snow, as the supporting colour.
Sky Blue #87ceeb
shippedSky Blue is paired with #300f62 in 5 real palettes, including Boeing's brand system and Coastal, as the supporting colour.
Real palettes that use #300f62
Tints & shades
Harmonies
Contrast
| #300f62 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 15.32:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.37:1 | 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 #300f62 as the background.
Brands using this color
Fonts for this mood
#300f62 reads as cool, vivid, dark. 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 #300f62 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/300f62-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