Nearest-color comparison
Dark Slate Blue #483D8B vs Iolite #5A4C8D: RGB distance 23.5 and contrast 1.23:1. Compare hue, luminance, saturation, WCAG and practical use.
Dark Slate Blue and Iolite are very close, with an RGB distance of 23.5. Iolite is lighter by 0.0269, and Dark Slate Blue is more saturated by 9 percentage points. Their mutual contrast is 1.23:1. The pair is too close for a readable foreground/background combination and works better as neighboring palette colors.
The main measurable differences between Dark Slate Blue and Iolite across RGB distance, luminance, hue, saturation, and contrast.
blue color
Dark Slate Blue is #483D8B, a cool blue with hue 248°, saturation 39% and luminance 0.0658. Beside Iolite, it is darker and more saturated. Of the two standard text choices, white text gives the higher contrast at 9.07:1.
blue color
Iolite is #5A4C8D, a cool blue with hue 253°, saturation 30% and luminance 0.0927. Beside Dark Slate Blue, it is lighter and less saturated. Of the two standard text choices, white text gives the higher contrast at 7.36:1.
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 Dark Slate Blue and Iolite, 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": "dark-slate-blue",
"name": "Dark Slate Blue",
"hex": "#483D8B",
"rgb": [
72,
61,
139
],
"hsl": [
248,
39,
39
],
"cmyk": [
48,
56,
0,
45
],
"family": "blue",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.0658,
"contrast": {
"black": 2.32,
"white": 9.07
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 9.07
},
"description": "Dark Slate Blue is #483D8B, a cool blue color with balanced character. Compared with Iolite, it is darker and more 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/dark-slate-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/dark-slate-blue.json"
},
{
"slug": "iolite",
"name": "Iolite",
"hex": "#5A4C8D",
"rgb": [
90,
76,
141
],
"hsl": [
253,
30,
43
],
"cmyk": [
36,
46,
0,
45
],
"family": "blue",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.0927,
"contrast": {
"black": 2.85,
"white": 7.36
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 7.36
},
"description": "Iolite is #5A4C8D, a cool blue color with balanced character. Compared with Dark Slate Blue, it is lighter and less saturated. Use it for jewel-tone palettes, luxury branding, and premium interface accents, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/iolite/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/iolite.json"
}
]{
"rgbDistance": 23.5,
"contrastRatio": 1.23,
"hslDelta": {
"hue": 5,
"saturation": 9,
"lightness": 4
},
"luminanceDelta": 0.0269,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [
"balanced"
],
"lighterColor": "Iolite",
"moreSaturatedColor": "Dark Slate Blue"
}{
"pairContrastRatio": 1.23,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Dark Slate Blue",
"background": "#483D8B",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 9.07
},
{
"color": "Iolite",
"background": "#5A4C8D",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 7.36
}
]
}{
"chooseFirstWhen": "Dark Slate Blue is better when the design needs balanced blue character, cool temperature, and the specific HEX value #483D8B.",
"chooseSecondWhen": "Iolite is better when the design needs balanced blue character, cool temperature, and the specific HEX value #5A4C8D.",
"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/dark-slate-blue-vs-iolite.json",
"https://www.colorsencyclopedia.com/api/colors/dark-slate-blue.json",
"https://www.colorsencyclopedia.com/api/colors/iolite.json"
]{
"datasetVersion": "1.0.0",
"slug": "dark-slate-blue-vs-iolite",
"type": "nearest",
"name": "Dark Slate Blue vs Iolite",
"verdict": "Dark Slate Blue and Iolite are very close colors. Iolite is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.23:1, so the pair is too low for text and better treated as a palette relationship.",
"summary": "Dark Slate Blue and Iolite are different blue colors with HEX values #483D8B and #5A4C8D. According to Colors Encyclopedia, their RGB distance is 23.5, their contrast ratio is 1.23:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
"rgbDistance": 23.5,
"contrastRatio": 1.23,
"colors": [
{
"slug": "dark-slate-blue",
"name": "Dark Slate Blue",
"hex": "#483D8B",
"rgb": [
72,
61,
139
],
"hsl": [
248,
39,
39
],
"cmyk": [
48,
56,
0,
45
],
"family": "blue",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.0658,
"contrast": {
"black": 2.32,
"white": 9.07
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 9.07
},
"description": "Dark Slate Blue is #483D8B, a cool blue color with balanced character. Compared with Iolite, it is darker and more 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/dark-slate-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/dark-slate-blue.json"
},
{
"slug": "iolite",
"name": "Iolite",
"hex": "#5A4C8D",
"rgb": [
90,
76,
141
],
"hsl": [
253,
30,
43
],
"cmyk": [
36,
46,
0,
45
],
"family": "blue",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.0927,
"contrast": {
"black": 2.85,
"white": 7.36
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 7.36
},
"description": "Iolite is #5A4C8D, a cool blue color with balanced character. Compared with Dark Slate Blue, it is lighter and less saturated. Use it for jewel-tone palettes, luxury branding, and premium interface accents, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/iolite/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/iolite.json"
}
],
"differences": {
"rgbDistance": 23.5,
"contrastRatio": 1.23,
"hslDelta": {
"hue": 5,
"saturation": 9,
"lightness": 4
},
"luminanceDelta": 0.0269,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [
"balanced"
],
"lighterColor": "Iolite",
"moreSaturatedColor": "Dark Slate Blue"
},
"accessibility": {
"pairContrastRatio": 1.23,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Dark Slate Blue",
"background": "#483D8B",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 9.07
},
{
"color": "Iolite",
"background": "#5A4C8D",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 7.36
}
]
},
"useCases": {
"chooseFirstWhen": "Dark Slate Blue is better when the design needs balanced blue character, cool temperature, and the specific HEX value #483D8B.",
"chooseSecondWhen": "Iolite is better when the design needs balanced blue character, cool temperature, and the specific HEX value #5A4C8D.",
"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/dark-slate-blue-vs-iolite.json",
"https://www.colorsencyclopedia.com/api/colors/dark-slate-blue.json",
"https://www.colorsencyclopedia.com/api/colors/iolite.json"
],
"url": "https://www.colorsencyclopedia.com/compare/dark-slate-blue-vs-iolite/",
"apiUrl": "https://www.colorsencyclopedia.com/api/compare/dark-slate-blue-vs-iolite.json"
}