Color
#3f28bd
#3f28bdrgb(63, 40, 189)hsl(249, 65%, 45%)oklch(0.42 0.215 278.8)Colors that go with #3f28bd
Charcoal, Sea Green and Steel 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 #3f28bd: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #3f28bd — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Steel Blue #4682b4
analogousshippedSteel Blue is #3f28bd's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Blue #0000ff
shippedBlue is paired with #3f28bd in 5 real palettes, including Zillow's brand system and Procter & Gamble'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 #3f28bd in 6 real palettes, including Blue Mono and Qualcomm's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Crimson #dc143c
shippedCrimson is paired with #3f28bd in 8 real palettes, including Behance's brand system and Dunkin''s brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Denim #1560bd
shippedDenim is paired with #3f28bd in 5 real palettes, including Intel's brand system and Google's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Dodger Blue #1e90ff
shippedDodger Blue is paired with #3f28bd in 4 real palettes, including Coursera's brand system and Cargo's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #3f28bd
Tints & shades
Harmonies
Contrast
| #3f28bd as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 9.33:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.25:1 | 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 #3f28bd 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
#3f28bd 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 #3f28bd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3f28bd-a79cc4-dfae4e-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