Neobank
Open in tool →Purple-and-lime is the challenger-bank uniform — high energy, and clearly not a legacy bank.
Color
#b4e727
#b4e727
hex
#b4e727rgb
rgb(180, 231, 39)hsl
hsl(76, 80%, 53%)oklch
oklch(0.862 0.206 124.6)Closest name: Inchworm (#b2ec5d)Relative luminance 0.67
Colors that go with #b4e727
Blue, Crimson and Red 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.
Blue #0000ff
shipped5 real palettes, including Robinhood's brand system and MongoDB's brand system put Blue beside #b4e727, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #b4e727 in 6 real palettes, including Wise's brand system and Lay's's brand system, as the accent.
Red #ff0000
shippedRed is paired with #b4e727 in 5 real palettes, including Wise's brand system and Gatorade's brand system, as the lead colour.
Taupe #483c32
shippedTaupe is paired with #b4e727 in 5 real palettes, including Crayon Box and 7-Eleven's brand system, as the text colour against it.
Plum #dda0dd
complementaryPlum sits directly opposite #b4e727 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Violet #ee82ee
split-complementshippedViolet is a split-complement of #b4e727: 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 #b4e727: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Deep Pink #ff1493
shipped3 real palettes, including Night Market and Arcade put Deep Pink beside #b4e727, as the supporting colour.
Real palettes that use #b4e727
Tints & shades
Harmonies
Contrast
| #b4e727 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.46:1 | fail | fail | fail | |
Aaon black | 14.4:1 | 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 #b4e727 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
mcpConnect your agent — build around #b4e727
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 #b4e727 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/b4e727-b3bea2-4e6edf-232d1f-f1efe9?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