Color
#210fa9
#210fa9rgb(33, 15, 169)hsl(247, 84%, 36%)oklch(0.353 0.217 271.3)Colors that go with #210fa9
Blue, Charcoal and Cornflower 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 #210fa9 in 4 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #210fa9: softer than #000 and cool enough to feel like part of the same palette.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #210fa9 in 4 real palettes, including Peacock's brand system and Blue Mono, as the accent — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #210fa9 in 5 real palettes, including Behance's brand system and Casper Sleep's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Orange Red #ff4500
shippedOrange Red is paired with #210fa9 in 4 real palettes, including Tide's brand system and Intercom's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Royal Blue #4169e1
shippedRoyal Blue is paired with #210fa9 in 9 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 #210fa9's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Taupe #483c32
shippedTaupe is paired with #210fa9 in 8 real palettes, including Boeing's brand system and Gillette's brand system, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #210fa9
Tints & shades
Harmonies
Contrast
| #210fa9 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 12.31:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.71:1 | 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 #210fa9 as the background.
Brands using this color
Fonts for this mood
#210fa9 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 #210fa9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/210fa9-a59cc4-dfaa4e-271f2d-e9ecf1?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