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Everything here lives under Settings → Customization, and it belongs to you, not to your organizations. Your clients inherit your brand; they can’t change it and they never see this section.
A new account starts Dialtu-purple with no logo. Nothing is pre-filled for you. Setting your colours and uploading a logo should be the first thing you do — before you invite anyone, because invitation emails carry your branding.
Customization sub-tabs: Brand, Theme, Brandable texts, Custom domains, Sending domain and Localization

Six sub-tabs, and everything on this page belongs to you

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Brand

Five things, all optional except the name. Images: SVG, PNG, JPG or WebP, up to 2 MB. The favicon also accepts ICO. Wide formats work best for the logo.
Upload a PNG or JPG and you get a crop step, which exports a clean transparent PNG at the right size — 600×200 for the logo, 512×512 for the isotype, 256×256 for the favicon. SVG and ICO files are used exactly as you upload them, with no crop step.
Brand sub-tab with empty logo, isotype and favicon upload boxes, plus the workspace name and support email fields

Three image slots, the workspace name, and your support address

The three slots above are empty, which is exactly how a new account arrives. Until you upload something, your users see a generated letter tile rather than a mark of yours.
If you upload no favicon, your users get an automatically generated tile — the first letter of your workspace name on your primary colour. They never see the Dialtu mark.

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Theme

Three colours drive everything: Primary, Secondary and Accent. The rest of the palette — around forty variables in all — is derived automatically unless you turn that off.

Generate palette from colour

Paste one hex value and get a full palette built around it.

Harmony presets

Complementary, analogous, triadic or tetradic.
Open Advanced variables to set any of the remaining colours by hand. You can save several named themes and keep two pointers: the active theme, which everyone sees, and the default, which Reset returns to.
Theme sub-tab showing the active theme, primary secondary and accent colours, product colours, the saved themes list and the contrast check

Brand colours up top, product colours below, saved themes underneath

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Where your colours end up

Save the theme once and your primary and accent colours follow you everywhere — the dashboard, the hosted login page, and your invitation emails. There’s no second place to set them.
Only primary and accent cross over. Surface, text and status colours stay in the dashboard.

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About the contrast check

The editor shows live WCAG AA pass/fail badges as you pick colours.
They’re advice, not a gate. A theme that fails contrast still saves. Read the badges — nothing else will stop you shipping a palette your users struggle to read.
There’s no separate dark-mode palette. One set of colours serves both modes.

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Brandable texts

Override wording in the interface, per language. Use it for the vocabulary your industry expects — renaming things your clients call something else.
Brandable texts sub-tab with a search box, a module filter and collapsible groups for the WhatsApp, Settings and Insight Agents modules

Grouped by module, searchable, with a reset for everything

Leave a field blank and the platform’s own wording is used for that language. Reset all overrides puts everything back at once.

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Localization

The last sub-tab, and the only one a non-partner account also gets. Two settings:
  • Default timezone — pre-fills new clients, agents and campaigns. Anyone can still override it on an individual record.
  • AI content language — the language used for AI-written content such as the Atlas executive summary and contact memory. Set it to Auto and each piece follows its own context: the reader’s interface language for a summary, the conversation’s language for memory.
Localization sub-tab with the default timezone selector and the AI content language selector

Timezone and AI content language

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What you can’t change

The headline and strapline beside the sign-in form are fixed, brand-neutral English. They don’t mention Dialtu, but you can’t edit them or translate them.
The favicon applies to the dashboard tab only. The hosted login page doesn’t currently pick it up, even though the panel reads as though it does.
The yourname.dialtu.com address is fixed at setup and can’t be renamed afterwards. If you want a different address, attach a domain of your own.
Your organizations all share your brand. There’s no per-client logo or palette — they sign in through your login page, under your name.

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Next step

Domains

Put the app on your own web address and send invitations from your own domain.