Terminal
Open in tool →Green for success, blue for links, pink for emphasis — the dark-mode developer family, tuned to sit on near-black without glare.
Color
#3bbf51
#3bbf51
hex
#3bbf51rgb
rgb(59, 191, 81)hsl
hsl(130, 53%, 49%)oklch
oklch(0.71 0.189 145.9)Closest name: Intoxicate (#11bb55)Relative luminance 0.3879
Colors that go with #3bbf51
Charcoal, Royal Blue and Taupe 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 body-text near-black for #3bbf51: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Royal Blue #4169e1
shippedRoyal Blue is paired with #3bbf51 in 6 real palettes, including Brilliant's brand system and Monster Energy's brand system, as the accent.
Taupe #483c32
shippedTaupe is paired with #3bbf51 in 7 real palettes, including Obsidian's brand system and Meadow, as the text colour against it.
Hot Pink #ff69b4
split-complementshippedHot Pink is a split-complement of #3bbf51: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Fuchsia #ff00ff
complementaryFuchsia sits directly opposite #3bbf51 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Cornflower Blue #6495ed
triadicshippedCornflower Blue completes a triad with #3bbf51 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #3bbf51 in 3 real palettes, including Undergrowth and Forest Floor, as the supporting colour.
Dark Orange #ff8c00
shippedDark Orange shows up next to #3bbf51 in 3 real palettes, including Playground and Learning App, as the lead colour.
Real palettes that use #3bbf51
Tints & shades
Harmonies
Contrast
| #3bbf51 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.4:1 | fail | fail | fail | |
Aaon black | 8.76:1 | 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 #3bbf51 as the background.
Brands using this color
Palettes built around it
mcpConnect your agent — build around #3bbf51
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #3bbf51 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/3bbf51-a2beaa-b14edf-1f2d28-ecf1e9?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