Color
#3fd991
#3fd991rgb(63, 217, 145)hsl(152, 67%, 55%)oklch(0.788 0.164 158.2)Colors that go with #3fd991
Charcoal, Blue and Cornflower 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 #3fd991: softer than #000 and cool enough to feel like part of the same palette.
Blue #0000ff
shipped5 real palettes, including Minecraft's brand system and Unity's brand system put Blue beside #3fd991, as the accent.
Cornflower Blue #6495ed
triadicshippedCornflower Blue completes a triad with #3fd991 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Crimson #dc143c
shippedCrimson is paired with #3fd991 in 4 real palettes, including Formula 1's brand system and Wise's brand system, as the supporting colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #3fd991: 4 real palettes, including Remix's brand system and Prime Video's brand system, as the lead colour.
Mustard Yellow #ffdb58
shipped4 real palettes, including Fresh Juice and Citrus Grove put Mustard Yellow beside #3fd991, as the supporting colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #3fd991 in 4 real palettes, including Docker's brand system and Brilliant's brand system, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #3fd991 in 14 real palettes, including 7-Eleven's brand system and WhatsApp's brand system, as the lead colour.
Real palettes that use #3fd991
Tints & shades
Harmonies
Contrast
| #3fd991 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.82:1 | fail | fail | fail | |
Aaon black | 11.55:1 | 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 #3fd991 as the background.
Brands using this color
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 #3fd991 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/3fd991-a2beb4-d459ce-1f2d2d-e9f1ea?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