Color
#3bb51c
#3bb51crgb(59, 181, 28)hsl(108, 73%, 41%)oklch(0.679 0.21 140.5)Colors that go with #3bb51c
Royal Blue, Taupe and Medium Orchid 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.
Royal Blue #4169e1
shippedRoyal Blue is paired with #3bb51c in 4 real palettes, including Brilliant's brand system and Console Light, as the accent.
Taupe #483c32
shippedTaupe is paired with #3bb51c in 5 real palettes, including Obsidian's brand system and Meadow, as the text colour against it.
Medium Orchid #ba55d3
complementaryMedium Orchid sits directly opposite #3bb51c on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Medium Purple #9370db
split-complementshippedMedium Purple is a split-complement of #3bb51c: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #3bb51c: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Cornflower Blue #6495ed
triadicshippedCornflower Blue completes a triad with #3bb51c — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Dark Orange #ff8c00
shippedDark Orange shows up next to #3bb51c in 3 real palettes, including Playground and Learning App, as the lead colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #3bb51c: 3 real palettes, including Playground and Unity's brand system, as the supporting colour.
Real palettes that use #3bb51c
Tints & shades
Harmonies
Contrast
| #3bb51c as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.69:1 | fail | fail | fail | |
Aaon black | 7.81:1 | pass | pass | pass | Passes AAA — no fix needed. |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3bb51c as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
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 #3bb51c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3bb51c-a4bea2-7c4edf-1f2d23-eff1e9?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