Color
#331d5d
#331d5drgb(51, 29, 93)hsl(261, 52%, 24%)oklch(0.299 0.109 294.8)Colors that go with #331d5d
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 #331d5d: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #331d5d'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 #331d5d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Teal #008080
triadicshippedTeal completes a triad with #331d5d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Blue #0000ff
shippedBlue is paired with #331d5d in 9 real palettes, including Sketch's brand system and Monzo's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Cadet Blue #5f9ea0
shippedCadet Blue is paired with #331d5d in 6 real palettes, including Open House and Coastal, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Cobalt Blue #0047ab
shippedCobalt Blue is paired with #331d5d in 5 real palettes, including Blue Mono and Purina Pro Plan's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Cornflower Blue #6495ed
shippedCornflower Blue is paired with #331d5d in 6 real palettes, including Blue Mono and Peacock's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #331d5d
Tints & shades
Harmonies
Contrast
| #331d5d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 14.24:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.47:1 | 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 #331d5d 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
#331d5d reads as cool, dark, luxury. 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 #331d5d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/331d5d-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