Brand color
Deno Primary
#6639bargb(102, 57, 186)hsl(261, 53%, 48%)oklch(0.474 0.191 293.8)Deno Primary on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the 2 public brands that use it and the palettes it appears in.
Colors that go with Deno Primary
Charcoal, Royal Blue and Sea 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for Deno Primary: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is Deno Primary's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Sea Green #2e8b57
split-complementshippedSea Green is a split-complement of Deno Primary: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with Deno Primary: 4 real palettes, including Zillow's brand system and Unilever's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with Deno Primary in 8 real palettes, including Gemstone and Wells Fargo's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with Deno Primary: 5 real palettes, including Linkedin's brand system and Slack's brand system, as the lead colour.
Midnight Blue #191970
shipped9 real palettes, including Kraken's brand system and Purina Pro Plan's brand system put Midnight Blue beside Deno Primary, as the lead colour.
Red #ff0000
shippedRed is paired with Deno Primary in 4 real palettes, including Twitch's brand system and L'Oréal's brand system, as the accent.
Real palettes that use Deno Primary
Tints & shades
Harmonies
Contrast
| Deno Primary as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.34:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.86:1 | 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 Deno Primary as the background.
Brands using this color
Fonts for this mood
Deno Primary 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 #6639ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/6639ba-af9cc4-dfcb4e-2a1f2d-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