Playground
Open in tool →Orange, blue and green — the colors of playground equipment; loud, cheerful, obviously for kids.
Color
Spline Primary
#4482fc
hex
#4482fcrgb
rgb(68, 130, 252)hsl
hsl(220, 97%, 63%)oklch
oklch(0.63 0.193 262.1)From Spline brand colorsRelative luminance 0.2422
Colors that go with Spline Primary
Charcoal, Red and Amber 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 Spline Primary: softer than #000 and cool enough to feel like part of the same palette.
Red #ff0000
triadicshippedRed completes a triad with Spline Primary — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Amber #ffbf00
shippedAmber is paired with Spline Primary in 9 real palettes, including Google's brand system and Heatwave, as the accent.
Blue #0000ff
shipped12 real palettes, including Readymag's brand system and Cargo's brand system put Blue beside Spline Primary, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with Spline Primary: 10 real palettes, including Carrefour's brand system and Behance's brand system, as the accent.
Crimson #dc143c
shippedCrimson is paired with Spline Primary in 9 real palettes, including Behance's brand system and WWE's brand system, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with Spline Primary: 10 real palettes, including Venmo's brand system and Patreon's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with Spline Primary: 15 real palettes, including Coursera's brand system and Venmo's brand system, as the accent.
Real palettes that use Spline Primary
Tints & shades
Harmonies
Contrast
| Spline Primary as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.59:1 | fail | pass | fail | |
Aaon black | 5.84:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with Spline Primary as the background.
Brands using this color
Palettes built around it
Fonts for this mood
Spline Primary reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around Spline Primary
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 #4482fc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/4482fc-9ca5c4-df694e-211f2d-e9f0f1?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