Arcade
Open in tool →Hot pink, cyan and acid yellow on near-black — cabinet-glow neon; the black surface is what makes the colours light up.
Color
#fbff05
#fbff05
hex
#fbff05rgb
rgb(251, 255, 5)hsl
hsl(61, 100%, 51%)oklch
oklch(0.965 0.211 110.9)Closest name: Bat-Signal (#feff00)Relative luminance 0.9204
Colors that go with #fbff05
Lilac, Violet and Deep Sky 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.
Lilac #c8a2c8
complementaryshippedLilac sits directly opposite #fbff05 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 #fbff05: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Deep Sky Blue #00bfff
split-complementshippedDeep Sky Blue is a split-complement of #fbff05: 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 Bumble's brand system put Blue beside #fbff05, as the supporting colour.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #fbff05: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Deep Pink #ff1493
shipped3 real palettes, including Arcade and JetBrains's brand system put Deep Pink beside #fbff05, as the lead colour.
Amber #ffbf00
shippedAmber is paired with #fbff05 in two real palettes: Gumroad's brand system and Binance's brand system, as the accent.
Crimson #dc143c
shippedCrimson is paired with #fbff05 in two real palettes: Lay's's brand system and Tequila Sunrise, as the accent.
Real palettes that use #fbff05
Tints & shades
Harmonies
Contrast
| #fbff05 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.08:1 | fail | fail | fail | |
Aaon black | 19.41:1 | 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 #fbff05 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 #fbff05
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 #fbff05 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/fbff05-babea2-4e92df-272d1f-f1ede9?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