Nearest-color comparison
Medium Slate Blue #7B68EE vs Slate Blue #6A5ACD: RGB distance 39.7 and contrast 1.28:1. Compare hue, luminance, saturation, WCAG and practical use.
Medium Slate Blue and Slate Blue are related but distinguishable, with an RGB distance of 39.7. Medium Slate Blue is lighter by 0.055, and Medium Slate Blue is more saturated by 27 percentage points. Their mutual contrast is 1.28:1. The pair is too close for a readable foreground/background combination and works better as neighboring palette colors.
The main measurable differences between Medium Slate Blue and Slate Blue across RGB distance, luminance, hue, saturation, and contrast.
blue color
Medium Slate Blue is #7B68EE, a cool blue with hue 249°, saturation 80% and luminance 0.2028. Beside Slate Blue, it is lighter and more saturated. Of the two standard text choices, black text gives the higher contrast at 5.06:1.
blue color
Slate Blue is #6A5ACD, a cool blue with hue 248°, saturation 53% and luminance 0.1478. Beside Medium Slate Blue, it is darker and less saturated. Of the two standard text choices, white text gives the higher contrast at 5.31:1.
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 Medium Slate Blue and Slate Blue, 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": "medium-slate-blue",
"name": "Medium Slate Blue",
"hex": "#7B68EE",
"rgb": [
123,
104,
238
],
"hsl": [
249,
80,
67
],
"cmyk": [
48,
56,
0,
7
],
"family": "blue",
"temperature": "cool",
"tone": [
"vibrant"
],
"luminance": 0.2028,
"contrast": {
"black": 5.06,
"white": 4.15
},
"wcag": {
"AA": [
"#000000"
],
"AAA": []
},
"bestText": {
"text": "#000000",
"label": "black text",
"ratio": 5.06
},
"description": "Medium Slate Blue is #7B68EE, a cool blue color with vibrant character. Compared with Slate Blue, it is lighter and more saturated. 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/medium-slate-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/medium-slate-blue.json"
},
{
"slug": "slate-blue",
"name": "Slate Blue",
"hex": "#6A5ACD",
"rgb": [
106,
90,
205
],
"hsl": [
248,
53,
58
],
"cmyk": [
48,
56,
0,
20
],
"family": "blue",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.1478,
"contrast": {
"black": 3.96,
"white": 5.31
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": []
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 5.31
},
"description": "Slate Blue is #6A5ACD, a cool blue color with balanced character. Compared with Medium Slate Blue, it is darker and less saturated. Use it for web design, css color systems, and ui prototyping, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/slate-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-blue.json"
}
]{
"rgbDistance": 39.7,
"contrastRatio": 1.28,
"hslDelta": {
"hue": 1,
"saturation": 27,
"lightness": 9
},
"luminanceDelta": 0.055,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [],
"lighterColor": "Medium Slate Blue",
"moreSaturatedColor": "Medium Slate Blue"
}{
"pairContrastRatio": 1.28,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Medium Slate Blue",
"background": "#7B68EE",
"foreground": "#000000",
"label": "black text",
"ratio": 5.06
},
{
"color": "Slate Blue",
"background": "#6A5ACD",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 5.31
}
]
}{
"chooseFirstWhen": "Medium Slate Blue is better when the design needs vibrant blue character, cool temperature, and the specific HEX value #7B68EE.",
"chooseSecondWhen": "Slate Blue is better when the design needs balanced blue character, cool temperature, and the specific HEX value #6A5ACD.",
"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/medium-slate-blue-vs-slate-blue.json",
"https://www.colorsencyclopedia.com/api/colors/medium-slate-blue.json",
"https://www.colorsencyclopedia.com/api/colors/slate-blue.json"
]{
"datasetVersion": "1.0.0",
"slug": "medium-slate-blue-vs-slate-blue",
"type": "nearest",
"name": "Medium Slate Blue vs Slate Blue",
"verdict": "Medium Slate Blue and Slate Blue are visually related colors. Medium Slate Blue is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.28:1, so the pair is too low for text and better treated as a palette relationship.",
"summary": "Medium Slate Blue and Slate Blue are different blue colors with HEX values #7B68EE and #6A5ACD. According to Colors Encyclopedia, their RGB distance is 39.7, their contrast ratio is 1.28:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
"rgbDistance": 39.7,
"contrastRatio": 1.28,
"colors": [
{
"slug": "medium-slate-blue",
"name": "Medium Slate Blue",
"hex": "#7B68EE",
"rgb": [
123,
104,
238
],
"hsl": [
249,
80,
67
],
"cmyk": [
48,
56,
0,
7
],
"family": "blue",
"temperature": "cool",
"tone": [
"vibrant"
],
"luminance": 0.2028,
"contrast": {
"black": 5.06,
"white": 4.15
},
"wcag": {
"AA": [
"#000000"
],
"AAA": []
},
"bestText": {
"text": "#000000",
"label": "black text",
"ratio": 5.06
},
"description": "Medium Slate Blue is #7B68EE, a cool blue color with vibrant character. Compared with Slate Blue, it is lighter and more saturated. 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/medium-slate-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/medium-slate-blue.json"
},
{
"slug": "slate-blue",
"name": "Slate Blue",
"hex": "#6A5ACD",
"rgb": [
106,
90,
205
],
"hsl": [
248,
53,
58
],
"cmyk": [
48,
56,
0,
20
],
"family": "blue",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.1478,
"contrast": {
"black": 3.96,
"white": 5.31
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": []
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 5.31
},
"description": "Slate Blue is #6A5ACD, a cool blue color with balanced character. Compared with Medium Slate Blue, it is darker and less saturated. Use it for web design, css color systems, and ui prototyping, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/slate-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-blue.json"
}
],
"differences": {
"rgbDistance": 39.7,
"contrastRatio": 1.28,
"hslDelta": {
"hue": 1,
"saturation": 27,
"lightness": 9
},
"luminanceDelta": 0.055,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [],
"lighterColor": "Medium Slate Blue",
"moreSaturatedColor": "Medium Slate Blue"
},
"accessibility": {
"pairContrastRatio": 1.28,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Medium Slate Blue",
"background": "#7B68EE",
"foreground": "#000000",
"label": "black text",
"ratio": 5.06
},
{
"color": "Slate Blue",
"background": "#6A5ACD",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 5.31
}
]
},
"useCases": {
"chooseFirstWhen": "Medium Slate Blue is better when the design needs vibrant blue character, cool temperature, and the specific HEX value #7B68EE.",
"chooseSecondWhen": "Slate Blue is better when the design needs balanced blue character, cool temperature, and the specific HEX value #6A5ACD.",
"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/medium-slate-blue-vs-slate-blue.json",
"https://www.colorsencyclopedia.com/api/colors/medium-slate-blue.json",
"https://www.colorsencyclopedia.com/api/colors/slate-blue.json"
],
"url": "https://www.colorsencyclopedia.com/compare/medium-slate-blue-vs-slate-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/compare/medium-slate-blue-vs-slate-blue.json"
}