Color
#3d015a
#3d015argb(61, 1, 90)hsl(280, 98%, 18%)oklch(0.279 0.14 309.8)Colors that go with #3d015a
Cobalt Blue, Denim and Royal 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.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #3d015a: 4 real palettes, including Blue Mono and Purina Pro Plan's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #3d015a: 7 real palettes, including Discover's brand system and Bank of America's brand system, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #3d015a in 5 real palettes, including Discord's brand system and Telehealth, as the lead colour.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #3d015a: 4 real palettes, including Discover's brand system and FedEx's brand system, as the accent.
Forest Green #228b22
complementaryForest Green sits directly opposite #3d015a on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped3 real palettes, including Sketch's brand system and Penpot's brand system put Blue beside #3d015a, as the accent.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #3d015a: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
shippedCrimson is paired with #3d015a in 3 real palettes, including Casper Sleep's brand system and Marvel's brand system, as the lead colour.
Real palettes that use #3d015a
Tints & shades
Harmonies
Contrast
| #3d015a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 15.55:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.35:1 | 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 #3d015a as the background.
Brands using this color
Fonts for this mood
#3d015a 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 #3d015a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3d015a-b99fc1-b8cb62-2d1f2c-ebe9f1?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