What accessibility standards does it check?

It checks against both WCAG 2.1 Level AA (minimum 4.5:1 for normal text, 3:1 for large text) and Level AAA (7:1 for normal text, 4.5:1 for large text).

Color Contrast Checker MCP Server for Google ADK 8 tools — connect in under 2 minutes

Name: Color Contrast Checker
Availability: InStock
Author: Vinkius

google.github.io/adk-docs/tools/mcp-tools

Built by Vinkius GDPR 8 Tools SDK

Google Agent Development Kit (ADK) is Google's framework for building production AI agents. Add Color Contrast Checker as an MCP tool provider through Vinkius and your ADK agents can call every tool with full schema introspection.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

from google.adk.agents import Agent
from google.adk.tools.mcp_tool import McpToolset
from google.adk.tools.mcp_tool.mcp_session_manager import (
    StreamableHTTPConnectionParams,
)

# Your Vinkius token. get it at cloud.vinkius.com
mcp_tools = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp",
    )
)

agent = Agent(
    model="gemini-2.5-pro",
    name="color_contrast_checker_agent",
    instruction=(
        "You help users interact with Color Contrast Checker "
        "using 8 available tools."
    ),
    tools=[mcp_tools],
)

Fully ManagedVinkius Servers

60%Token savings

High SecurityEnterprise-grade

IAMAccess control

EU AI ActCompliant

DLPData protection

V8 IsolateSandboxed

Ed25519Audit chain

<40msKill switch

Stream every event to Splunk, Datadog, or your own webhook in real-time

* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Color Contrast Checker MCP Server

Connect Color Contrast Checker to your AI agent and validate WCAG accessibility compliance for any color combination.

Google ADK natively supports Color Contrast Checker as an MCP tool provider. declare Vinkius Edge URL and the framework handles discovery, validation, and execution automatically. Combine 8 tools with Gemini's long-context reasoning for complex multi-tool workflows, with production-ready session management and evaluation built in.

What you can do

Custom Contrast Checks — Test any foreground/background color pair against WCAG AA and AAA standards
Preset Scenarios — Quickly check text on white, text on black, white text on colors, and black text on colors
Dark Mode Validation — Verify color contrast for dark mode UI designs
Light Mode Validation — Ensure readability in light theme interfaces
Accessibility Reporting — Get instant pass/fail reports with contrast ratios

The Color Contrast Checker MCP Server exposes 8 tools through the Vinkius. Connect it to Google ADK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Color Contrast Checker to Google ADK via MCP

Follow these steps to integrate the Color Contrast Checker MCP Server with Google ADK.

Install Google ADK

Run pip install google-adk

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Create the agent

Save the code above and integrate into your ADK workflow

Explore tools

The agent will discover 8 tools from Color Contrast Checker via MCP

Why Use Google ADK with the Color Contrast Checker MCP Server

Google ADK provides unique advantages when paired with Color Contrast Checker through the Model Context Protocol.

Google ADK natively supports MCP tool servers. declare a tool provider and the framework handles discovery, validation, and execution

Built on Gemini models, ADK provides long-context reasoning ideal for complex multi-tool workflows with Color Contrast Checker

Production-ready features like session management, evaluation, and deployment come built-in. not bolted on

Seamless integration with Google Cloud services means you can combine Color Contrast Checker tools with BigQuery, Vertex AI, and Cloud Functions

Color Contrast Checker + Google ADK Use Cases

Practical scenarios where Google ADK combined with the Color Contrast Checker MCP Server delivers measurable value.

Enterprise data agents: ADK agents query Color Contrast Checker and cross-reference results with internal databases for comprehensive analysis

Multi-modal workflows: combine Color Contrast Checker tool responses with Gemini's vision and language capabilities in a single agent

Automated compliance checks: schedule ADK agents to query Color Contrast Checker regularly and flag policy violations or configuration drift

Internal tool platforms: build self-service agent platforms where teams connect their own MCP servers including Color Contrast Checker

Color Contrast Checker MCP Tools for Google ADK (8)

These 8 tools become available when you connect Color Contrast Checker to Google ADK via MCP:

check_black_text_on_bg

Check contrast of pure black text against a specific background

check_color_contrast

1 contrast ratio for a specific foreground and background color pair to audit visual accessibility. Check the WCAG contrast ratio between a foreground and background color

check_danger_text_contrast

Check contrast of standard danger/error red text on a background

check_dark_mode_surface

Check contrast against a standard dark mode surface

check_light_mode_surface

Check contrast against a standard light mode surface

check_text_on_pure_black

Check contrast of a text color against a pure black background

check_text_on_pure_white

Check contrast of a text color against a pure white background

check_white_text_on_bg

Check contrast of pure white text against a specific background

Example Prompts for Color Contrast Checker in Google ADK

Ready-to-use prompts you can give your Google ADK agent to start working with Color Contrast Checker immediately.

"Check if #3B82F6 works on a white background for body text."

Troubleshooting Color Contrast Checker MCP Server with Google ADK

Common issues when connecting Color Contrast Checker to Google ADK through the Vinkius, and how to resolve them.

McpToolset not found

Update: pip install --upgrade google-adk

Color Contrast Checker + Google ADK FAQ

Common questions about integrating Color Contrast Checker MCP Server with Google ADK.

How does Google ADK connect to MCP servers?

Import the MCP toolset class and pass the server URL. ADK discovers and registers all tools automatically, making them available to your agent's tool-use loop.

Can ADK agents use multiple MCP servers?

Yes. Declare multiple MCP tool providers in your agent configuration. ADK merges all tool schemas and the agent can call tools from any server in a single turn.

Which Gemini models work best with MCP tools?

Gemini 2.0 Flash and Pro models both support function calling required for MCP tools. Flash is recommended for latency-sensitive use cases, Pro for complex reasoning.