Indigo SaaS
Open in tool →The dependable indigo-and-emerald B2B pairing: indigo for primary actions, emerald reserved for success states.
Color
#647378
#647378
hex
#647378rgb
rgb(100, 115, 120)hsl
hsl(195, 9%, 43%)oklch
oklch(0.545 0.02 219.8)Closest name: Batman (#656e72)Relative luminance 0.1633
Colors that go with #647378
Charcoal, Champagne and Cobalt 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black that reads cleanly against #647378 without the hard edge of pure #000.
Champagne #f7e7ce
shipped7 real palettes, including Forest Floor and Coffee Bar put Champagne beside #647378, as that palette's text colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #647378: 5 real palettes, including Ink & Paper and Fintech Trust, as the accent.
Copper #b87333
shippedDesigners have shipped Copper with #647378: 7 real palettes, including Riverbed and Wellness, as the accent.
Crimson #dc143c
shippedCrimson is paired with #647378 in 8 real palettes, including Retro Pop and Redfin's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #647378: 11 real palettes, including Campus and The New York Times's brand system, as the lead colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #647378: 5 real palettes, including Newsprint and Wendy's's brand system, as the lead colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #647378 in 7 real palettes, including Mid-Century and Sapphire & Gold, as the accent.
Real palettes that use #647378
Tints & shades
Harmonies
Contrast
| #647378 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.92:1 | pass | pass | fail |
|
Aaon black | 4.27:1 | fail | 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 #647378 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
#647378 reads as muted, minimal. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #647378
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 #647378 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/647378-9cb5c4-df4e70-1f242d-e9f1ef?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