Brand color
Substack Secondary
#0083d5rgb(0, 131, 213)hsl(203, 100%, 42%)oklch(0.593 0.156 247)Substack Secondary on this page is the real value, not a screenshot: exact hex, RGB, HSL and OKLCH, ten tints and ten shades, classic harmonies, and WCAG contrast with fixes — plus the 1 public brand that uses it and the palettes it appears in.
Colors that go with Substack Secondary
Charcoal, Crimson and Copper 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 Substack Secondary: softer than #000 and cool enough to feel like part of the same palette.
Crimson #dc143c
triadicshippedCrimson completes a triad with Substack Secondary — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Copper #b87333
complementaryshippedCopper sits directly opposite Substack Secondary 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 Substack Secondary in 12 real palettes, including Wired's brand system and Walmart's brand system, as the accent.
Blue #0000ff
shipped13 real palettes, including Readymag's brand system and Qualcomm's brand system put Blue beside Substack Secondary, as the supporting colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with Substack Secondary: 10 real palettes, including Hershey's's brand system and General Mills's brand system, as the supporting colour.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with Substack Secondary: 9 real palettes, including Telegram's brand system and Patreon's brand system, as the lead colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with Substack Secondary: 5 real palettes, including Honda's brand system and AT&T's brand system, as the supporting colour.
Real palettes that use Substack Secondary
Tints & shades
Harmonies
Contrast
| Substack Secondary as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.03:1 | fail | pass | fail | |
Aaon black | 5.21:1 | 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 Substack Secondary as the background.
Brands using this color
Fonts for this mood
Substack Secondary reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
Point 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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #0083d5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/0083d5-9cb0c4-df4e5d-1f222d-e9f1f0?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