Color
#381b69
#381b69rgb(56, 27, 105)hsl(262, 59%, 26%)oklch(0.312 0.128 294.9)Colors that go with #381b69
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 #381b69: softer than #000 and cool enough to feel like part of the same palette.
Royal Blue #4169e1
analogousshippedRoyal Blue is #381b69'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 #381b69: 4 real palettes, including SoFi's brand system and Open House, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #381b69: 4 real palettes, including Blue Mono and Purina Pro Plan's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #381b69 in 5 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #381b69: 14 real palettes, including Bank of America's brand system and Panasonic's brand system, as the accent.
Light Pink #ffb6c1
shippedLight Pink shows up next to #381b69 in 4 real palettes, including Macaron and Railway's brand system, as the lead colour.
Orange Red #ff4500
shippedOrange Red is paired with #381b69 in 5 real palettes, including Tide's brand system and Monzo's brand system, as the accent.
Real palettes that use #381b69
Tints & shades
Harmonies
Contrast
| #381b69 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 13.74:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.53:1 | 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 #381b69 as the background.
Brands using this color
Fonts for this mood
#381b69 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 #381b69 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/381b69-af9cc4-dfce4e-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