Color
#b3f401
#b3f401rgb(179, 244, 1)hsl(76, 99%, 48%)oklch(0.89 0.228 126.7)Colors that go with #b3f401
Red, Plum and Violet 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.
Red #ff0000
shippedRed is paired with #b3f401 in 4 real palettes, including Wise's brand system and Heineken's brand system, as the lead colour.
Plum #dda0dd
complementaryPlum sits directly opposite #b3f401 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 #b3f401: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Blue #0000ff
shipped3 real palettes, including Robinhood's brand system and Snapchat's brand system put Blue beside #b3f401, as the supporting colour.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #b3f401: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Crimson #dc143c
shippedCrimson is paired with #b3f401 in 3 real palettes, including Wise's brand system and Ferrari's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #b3f401: 3 real palettes, including Star Wars's brand system and JetBrains's brand system, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #b3f401 in 3 real palettes, including Calvin Klein's brand system and Tommy Hilfiger's brand system, as the lead colour.
Real palettes that use #b3f401
Tints & shades
Harmonies
Contrast
| #b3f401 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.32:1 | fail | fail | fail | |
Aaon black | 15.86:1 | 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 #b3f401 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 #b3f401 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/b3f401-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