Nearest-color comparison
Rubber #2A2725 vs Slate Black #26282A: RGB distance 6.5 and contrast 1:1. Compare hue, luminance, saturation, WCAG and practical use.
Rubber and Slate Black are very close, with an RGB distance of 6.5. Slate Black is lighter by 0.0002, and Rubber is more saturated by 1 percentage points. Their mutual contrast is 1:1. The pair is too close for a readable foreground/background combination and works better as neighboring palette colors.
The main measurable differences between Rubber and Slate Black across RGB distance, luminance, hue, saturation, and contrast.
gray color
Rubber is #2A2725, a neutral gray with hue 24°, saturation 6% and luminance 0.0208. Beside Slate Black, it is darker and more saturated. Of the two standard text choices, white text gives the higher contrast at 14.83:1.
gray color
Slate Black is #26282A, a neutral gray with hue 210°, saturation 5% and luminance 0.021. Beside Rubber, it is lighter and less saturated. Of the two standard text choices, white text gives the higher contrast at 14.79:1.
Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.
Downloadable color comparison infographic
Save a high-resolution comparison infographic with both HEX colors, visual distance, mutual contrast, and accessibility guidance.
A compact visual strip showing the two compared colors with nearby harmony and variant context.
Machine-readable data
Structured comparison data for Rubber and Slate Black, including color systems, RGB distance, HSL deltas, contrast, accessibility guidance, use cases, and API links.
Colors Encyclopedia
colorsBoth named color records with HEX, RGB, HSL, CMYK, luminance, WCAG, and linksdifferencesRGB distance, HSL deltas, luminance delta, contrast, and shared attributesaccessibilityPair contrast and safer text choices for each coloruseCasesWhen to choose each color and when to use them togetherrelatedApiMachine-readable comparison and color endpoints[
{
"slug": "rubber",
"name": "Rubber",
"hex": "#2A2725",
"rgb": [
42,
39,
37
],
"hsl": [
24,
6,
15
],
"cmyk": [
0,
7,
12,
84
],
"family": "gray",
"temperature": "neutral",
"tone": [
"dark"
],
"luminance": 0.0208,
"contrast": {
"black": 1.42,
"white": 14.83
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 14.83
},
"description": "Rubber is #2A2725, a neutral gray color with dark character. Compared with Slate Black, it is darker and more saturated. Use it for industrial design, safety systems, and hardware palettes, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/rubber/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/rubber.json"
},
{
"slug": "slate-black",
"name": "Slate Black",
"hex": "#26282A",
"rgb": [
38,
40,
42
],
"hsl": [
210,
5,
16
],
"cmyk": [
10,
5,
0,
84
],
"family": "gray",
"temperature": "neutral",
"tone": [
"dark"
],
"luminance": 0.021,
"contrast": {
"black": 1.42,
"white": 14.79
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 14.79
},
"description": "Slate Black is #26282A, a neutral gray color with dark character. Compared with Rubber, it is lighter and less saturated. Use it for backgrounds, typography, and product surfaces, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/slate-black/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-black.json"
}
]{
"rgbDistance": 6.5,
"contrastRatio": 1,
"hslDelta": {
"hue": 186,
"saturation": 1,
"lightness": 1
},
"luminanceDelta": 0.0002,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [
"dark"
],
"lighterColor": "Slate Black",
"moreSaturatedColor": "Rubber"
}{
"pairContrastRatio": 1,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Rubber",
"background": "#2A2725",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 14.83
},
{
"color": "Slate Black",
"background": "#26282A",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 14.79
}
]
}{
"chooseFirstWhen": "Rubber is better when the design needs dark gray character, neutral temperature, and the specific HEX value #2A2725.",
"chooseSecondWhen": "Slate Black is better when the design needs dark gray character, neutral temperature, and the specific HEX value #26282A.",
"useTogetherWhen": "Use these colors together as related palette neighbors, subtle material differences, or tonal alternatives rather than readable foreground/background pairs."
}[
"https://www.colorsencyclopedia.com/api/compare/rubber-vs-slate-black.json",
"https://www.colorsencyclopedia.com/api/colors/rubber.json",
"https://www.colorsencyclopedia.com/api/colors/slate-black.json"
]{
"datasetVersion": "1.0.0",
"slug": "rubber-vs-slate-black",
"type": "nearest",
"name": "Rubber vs Slate Black",
"verdict": "Rubber and Slate Black are very close colors. Slate Black is the lighter option. They share similar temperature behavior. Their mutual contrast is 1:1, so the pair is too low for text and better treated as a palette relationship.",
"summary": "Rubber and Slate Black are different gray colors with HEX values #2A2725 and #26282A. According to Colors Encyclopedia, their RGB distance is 6.5, their contrast ratio is 1:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
"rgbDistance": 6.5,
"contrastRatio": 1,
"colors": [
{
"slug": "rubber",
"name": "Rubber",
"hex": "#2A2725",
"rgb": [
42,
39,
37
],
"hsl": [
24,
6,
15
],
"cmyk": [
0,
7,
12,
84
],
"family": "gray",
"temperature": "neutral",
"tone": [
"dark"
],
"luminance": 0.0208,
"contrast": {
"black": 1.42,
"white": 14.83
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 14.83
},
"description": "Rubber is #2A2725, a neutral gray color with dark character. Compared with Slate Black, it is darker and more saturated. Use it for industrial design, safety systems, and hardware palettes, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/rubber/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/rubber.json"
},
{
"slug": "slate-black",
"name": "Slate Black",
"hex": "#26282A",
"rgb": [
38,
40,
42
],
"hsl": [
210,
5,
16
],
"cmyk": [
10,
5,
0,
84
],
"family": "gray",
"temperature": "neutral",
"tone": [
"dark"
],
"luminance": 0.021,
"contrast": {
"black": 1.42,
"white": 14.79
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 14.79
},
"description": "Slate Black is #26282A, a neutral gray color with dark character. Compared with Rubber, it is lighter and less saturated. Use it for backgrounds, typography, and product surfaces, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/slate-black/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-black.json"
}
],
"differences": {
"rgbDistance": 6.5,
"contrastRatio": 1,
"hslDelta": {
"hue": 186,
"saturation": 1,
"lightness": 1
},
"luminanceDelta": 0.0002,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [
"dark"
],
"lighterColor": "Slate Black",
"moreSaturatedColor": "Rubber"
},
"accessibility": {
"pairContrastRatio": 1,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Rubber",
"background": "#2A2725",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 14.83
},
{
"color": "Slate Black",
"background": "#26282A",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 14.79
}
]
},
"useCases": {
"chooseFirstWhen": "Rubber is better when the design needs dark gray character, neutral temperature, and the specific HEX value #2A2725.",
"chooseSecondWhen": "Slate Black is better when the design needs dark gray character, neutral temperature, and the specific HEX value #26282A.",
"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/rubber-vs-slate-black.json",
"https://www.colorsencyclopedia.com/api/colors/rubber.json",
"https://www.colorsencyclopedia.com/api/colors/slate-black.json"
],
"url": "https://www.colorsencyclopedia.com/compare/rubber-vs-slate-black/",
"apiUrl": "https://www.colorsencyclopedia.com/api/compare/rubber-vs-slate-black.json"
}