Laser
Open in tool →Laser green, violet and cyan — the synthwave/gaming set; keep the type near-white and let one neon own each screen.
Color
#42e9ff
#42e9ff
hex
#42e9ffrgb
rgb(66, 233, 255)hsl
hsl(187, 100%, 63%)oklch
oklch(0.86 0.134 208.2)Closest name: Aqua (#0ff0fe)Relative luminance 0.6666
Colors that go with #42e9ff
Charcoal, Deep Sky 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 text near-black for #42e9ff: softer than #000 and cool enough to feel like part of the same palette.
Deep Sky Blue #00bfff
analogousshippedDeep Sky Blue is #42e9ff's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Taupe #483c32
shippedTaupe is paired with #42e9ff in 9 real palettes, including Boeing's brand system and Macaron, as the text colour against it.
Wheat #f5deb3
shippedDesigners have shipped Wheat with #42e9ff: 4 real palettes, including Mint Chip and Sorbet, as the accent.
Salmon #fa8072
complementarySalmon sits directly opposite #42e9ff on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Dark Orange #ff8c00
split-complementshippedDark Orange is a split-complement of #42e9ff: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Crimson #dc143c
shippedCrimson is paired with #42e9ff in 3 real palettes, including Formula 1's brand system and Frost & Ember, as the supporting colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #42e9ff: 3 real palettes, including Bluesky Social's brand system and Opensea's brand system, as the lead colour.
Real palettes that use #42e9ff
Tints & shades
Harmonies
Contrast
| #42e9ff as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.47:1 | fail | fail | fail | |
Aaon black | 14.33:1 | 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 #42e9ff 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
Fonts for this mood
#42e9ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #42e9ff
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 #42e9ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/42e9ff-a2b8be-df4e83-1f262d-e9f1ee?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