Nearest-color comparison

Red vs Signal Red

Red and Signal Red are different red colors with HEX values #FF0000 and #E60000. According to Colors Encyclopedia, their RGB distance is 25, their contrast ratio is 1.2:1, and the comparison helps choose between tone, temperature, and accessibility behavior.

Red and Signal Red are visually related colors. Red is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.2:1, so the pair is too low for text and better treated as a palette relationship.

Differences Use cases Accessibility JSON

Red#FF0000

Signal Red#E60000

Quick Difference Summary

The main measurable differences between Red and Signal Red across RGB distance, luminance, hue, saturation, and contrast.

RGB distance25

Pair contrast1.2:1

Luminance delta0.0444

Hue delta0 deg

Lighter colorRed

More saturatedRed

Side-by-Side Color Profiles

red color

Red

Red is #FF0000, a warm red color with vibrant character. Compared with Signal Red, it is lighter and similar in saturation. Use it for web design, css color systems, and ui prototyping, with black text as the safer foreground option.

HEX#FF0000 RGB255, 0, 0 HSL0, 100, 50 CMYK0, 100, 100, 0 Luminance0.2126 Best textblack text

Color page WCAG HEX atlas

red color

Signal Red

Signal Red is #E60000, a warm red color with vibrant character. Compared with Red, it is darker and similar in saturation. Use it for neon accents, event graphics, and high-energy digital design, with white text as the safer foreground option.

HEX#E60000 RGB230, 0, 0 HSL0, 100, 45 CMYK0, 100, 100, 10 Luminance0.1682 Best textwhite text

Color page WCAG HEX atlas

When to Use Red or Signal Red

Choose RedRed is better when the design needs vibrant red character, warm temperature, and the specific HEX value #FF0000.

Choose Signal RedSignal Red is better when the design needs vibrant red character, warm temperature, and the specific HEX value #E60000.

Use togetherUse these colors together as related palette neighbors, subtle material differences, or tonal alternatives rather than readable foreground/background pairs.

Technical Comparison Table

PropertyRedSignal Red

HEX#FF0000#E60000

RGB255, 0, 0230, 0, 0

HSL0, 100, 500, 100, 45

CMYK0, 100, 100, 00, 100, 100, 10

FamilyRedRed

TemperatureWarmWarm

ToneVibrantVibrant

Luminance0.21260.1682

Black contrast5.25:14.36:1

White contrast4:14.81:1

Shared tonesVibrant

Accessibility and Contrast

Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.

Redblack text - 5.25:1

Signal Redwhite text - 4.81:1

Related Palette Strip

A compact visual strip showing the two compared colors with nearby harmony and variant context.

Red#FF0000

Signal Red#E60000

#FF5C5C#FF5C5C

#FF4242#FF4242

Cyan#00FFFF

#00E5E6#00E5E6

colorsBoth named color records with HEX, RGB, HSL, CMYK, luminance, WCAG, and links

differencesRGB distance, HSL deltas, luminance delta, contrast, and shared attributes

accessibilityPair contrast and safer text choices for each color

useCasesWhen to choose each color and when to use them together

relatedApiMachine-readable comparison and color endpoints

Structured sections

Colors

[
  {
    "slug": "red",
    "name": "Red",
    "hex": "#FF0000",
    "rgb": [
      255,
      0,
      0
    ],
    "hsl": [
      0,
      100,
      50
    ],
    "cmyk": [
      0,
      100,
      100,
      0
    ],
    "family": "red",
    "temperature": "warm",
    "tone": [
      "vibrant"
    ],
    "luminance": 0.2126,
    "contrast": {
      "black": 5.25,
      "white": 4
    },
    "wcag": {
      "AA": [
        "#000000"
      ],
      "AAA": []
    },
    "bestText": {
      "text": "#000000",
      "label": "black text",
      "ratio": 5.25
    },
    "description": "Red is #FF0000, a warm red color with vibrant character. Compared with Signal Red, it is lighter and similar in saturation. Use it for web design, css color systems, and ui prototyping, with black text as the safer foreground option.",
    "url": "https://www.colorsencyclopedia.com/colors/red/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/red.json"
  },
  {
    "slug": "signal-red",
    "name": "Signal Red",
    "hex": "#E60000",
    "rgb": [
      230,
      0,
      0
    ],
    "hsl": [
      0,
      100,
      45
    ],
    "cmyk": [
      0,
      100,
      100,
      10
    ],
    "family": "red",
    "temperature": "warm",
    "tone": [
      "vibrant"
    ],
    "luminance": 0.1682,
    "contrast": {
      "black": 4.36,
      "white": 4.81
    },
    "wcag": {
      "AA": [
        "#FFFFFF"
      ],
      "AAA": []
    },
    "bestText": {
      "text": "#FFFFFF",
      "label": "white text",
      "ratio": 4.81
    },
    "description": "Signal Red is #E60000, a warm red color with vibrant character. Compared with Red, it is darker and similar in saturation. Use it for neon accents, event graphics, and high-energy digital design, with white text as the safer foreground option.",
    "url": "https://www.colorsencyclopedia.com/colors/signal-red/",
    "apiUrl": "https://www.colorsencyclopedia.com/api/colors/signal-red.json"
  }
]

Differences

{
  "rgbDistance": 25,
  "contrastRatio": 1.2,
  "hslDelta": {
    "hue": 0,
    "saturation": 0,
    "lightness": 5
  },
  "luminanceDelta": 0.0444,
  "sameFamily": true,
  "sameTemperature": true,
  "sharedTones": [
    "vibrant"
  ],
  "lighterColor": "Red",
  "moreSaturatedColor": "Red"
}

Accessibility

{
  "pairContrastRatio": 1.2,
  "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
  "safeText": [
    {
      "color": "Red",
      "background": "#FF0000",
      "foreground": "#000000",
      "label": "black text",
      "ratio": 5.25
    },
    {
      "color": "Signal Red",
      "background": "#E60000",
      "foreground": "#FFFFFF",
      "label": "white text",
      "ratio": 4.81
    }
  ]
}

Use cases

{
  "chooseFirstWhen": "Red is better when the design needs vibrant red character, warm temperature, and the specific HEX value #FF0000.",
  "chooseSecondWhen": "Signal Red is better when the design needs vibrant red character, warm temperature, and the specific HEX value #E60000.",
  "useTogetherWhen": "Use these colors together as related palette neighbors, subtle material differences, or tonal alternatives rather than readable foreground/background pairs."
}

Related API

[
  "https://www.colorsencyclopedia.com/api/compare/red-vs-signal-red.json",
  "https://www.colorsencyclopedia.com/api/colors/red.json",
  "https://www.colorsencyclopedia.com/api/colors/signal-red.json"
]

Full JSON dataset

{
  "datasetVersion": "1.0.0",
  "slug": "red-vs-signal-red",
  "type": "nearest",
  "name": "Red vs Signal Red",
  "verdict": "Red and Signal Red are visually related colors. Red is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.2:1, so the pair is too low for text and better treated as a palette relationship.",
  "summary": "Red and Signal Red are different red colors with HEX values #FF0000 and #E60000. According to Colors Encyclopedia, their RGB distance is 25, their contrast ratio is 1.2:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
  "rgbDistance": 25,
  "contrastRatio": 1.2,
  "colors": [
    {
      "slug": "red",
      "name": "Red",
      "hex": "#FF0000",
      "rgb": [
        255,
        0,
        0
      ],
      "hsl": [
        0,
        100,
        50
      ],
      "cmyk": [
        0,
        100,
        100,
        0
      ],
      "family": "red",
      "temperature": "warm",
      "tone": [
        "vibrant"
      ],
      "luminance": 0.2126,
      "contrast": {
        "black": 5.25,
        "white": 4
      },
      "wcag": {
        "AA": [
          "#000000"
        ],
        "AAA": []
      },
      "bestText": {
        "text": "#000000",
        "label": "black text",
        "ratio": 5.25
      },
      "description": "Red is #FF0000, a warm red color with vibrant character. Compared with Signal Red, it is lighter and similar in saturation. Use it for web design, css color systems, and ui prototyping, with black text as the safer foreground option.",
      "url": "https://www.colorsencyclopedia.com/colors/red/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/red.json"
    },
    {
      "slug": "signal-red",
      "name": "Signal Red",
      "hex": "#E60000",
      "rgb": [
        230,
        0,
        0
      ],
      "hsl": [
        0,
        100,
        45
      ],
      "cmyk": [
        0,
        100,
        100,
        10
      ],
      "family": "red",
      "temperature": "warm",
      "tone": [
        "vibrant"
      ],
      "luminance": 0.1682,
      "contrast": {
        "black": 4.36,
        "white": 4.81
      },
      "wcag": {
        "AA": [
          "#FFFFFF"
        ],
        "AAA": []
      },
      "bestText": {
        "text": "#FFFFFF",
        "label": "white text",
        "ratio": 4.81
      },
      "description": "Signal Red is #E60000, a warm red color with vibrant character. Compared with Red, it is darker and similar in saturation. Use it for neon accents, event graphics, and high-energy digital design, with white text as the safer foreground option.",
      "url": "https://www.colorsencyclopedia.com/colors/signal-red/",
      "apiUrl": "https://www.colorsencyclopedia.com/api/colors/signal-red.json"
    }
  ],
  "differences": {
    "rgbDistance": 25,
    "contrastRatio": 1.2,
    "hslDelta": {
      "hue": 0,
      "saturation": 0,
      "lightness": 5
    },
    "luminanceDelta": 0.0444,
    "sameFamily": true,
    "sameTemperature": true,
    "sharedTones": [
      "vibrant"
    ],
    "lighterColor": "Red",
    "moreSaturatedColor": "Red"
  },
  "accessibility": {
    "pairContrastRatio": 1.2,
    "textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
    "safeText": [
      {
        "color": "Red",
        "background": "#FF0000",
        "foreground": "#000000",
        "label": "black text",
        "ratio": 5.25
      },
      {
        "color": "Signal Red",
        "background": "#E60000",
        "foreground": "#FFFFFF",
        "label": "white text",
        "ratio": 4.81
      }
    ]
  },
  "useCases": {
    "chooseFirstWhen": "Red is better when the design needs vibrant red character, warm temperature, and the specific HEX value #FF0000.",
    "chooseSecondWhen": "Signal Red is better when the design needs vibrant red character, warm temperature, and the specific HEX value #E60000.",
    "useTogetherWhen": "Use these colors together as related palette neighbors, subtle material differences, or tonal alternatives rather than readable foreground/background pairs."
  },
  "relatedApi": [
    "https://www.colorsencyclopedia.com/api/compare/red-vs-signal-red.json",
    "https://www.colorsencyclopedia.com/api/colors/red.json",
    "https://www.colorsencyclopedia.com/api/colors/signal-red.json"
  ],
  "url": "https://www.colorsencyclopedia.com/compare/red-vs-signal-red/",
  "apiUrl": "https://www.colorsencyclopedia.com/api/compare/red-vs-signal-red.json"
}