Fresh Juice
Open in tool →Orange, mango and mint — a sugar rush; keep the type black so it stays legible under all that color.
Color
#ff643d
#ff643d
hex
#ff643drgb
rgb(255, 100, 61)hsl
hsl(12, 100%, 62%)oklch
oklch(0.696 0.197 35.2)Closest name: tomato (#ff6347)Relative luminance 0.3071
Colors that go with #ff643d
Charcoal, Light Sea Green 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 body-text near-black for #ff643d: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Light Sea Green #20b2aa
complementaryshippedLight Sea Green sits directly opposite #ff643d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #ff643d in 7 real palettes, including Ember and Heatwave, as the accent.
Blue #0000ff
shipped7 real palettes, including Readymag's brand system and Monzo's brand system put Blue beside #ff643d, as the supporting colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #ff643d: 4 real palettes, including Alpine and Diner, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #ff643d: 4 real palettes, including Tide's brand system and NASA's brand system, as the lead colour.
Cornflower Blue #6495ed
split-complementshippedCornflower Blue is a split-complement of #ff643d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Crimson #dc143c
shippedCrimson is paired with #ff643d in 7 real palettes, including Burger King's brand system and Pizza Hut's brand system, as the lead colour.
Real palettes that use #ff643d
Tints & shades
Harmonies
Contrast
| #ff643d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.94:1 | fail | fail | fail | |
Aaon black | 7.14:1 | 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 #ff643d as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#ff643d reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #ff643d
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 #ff643d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/ff643d-c4a99c-62cbad-2d281f-f1e9ec?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