Nearest-color comparison
Iris #5A4FCF vs Slate Blue #6A5ACD: RGB distance 19.5 and contrast 1.15:1. Compare hue, luminance, saturation, WCAG and practical use.
Iris and Slate Blue are very close, with an RGB distance of 19.5. Slate Blue is lighter by 0.0251, and Iris is more saturated by 4 percentage points. Their mutual contrast is 1.15:1. The pair is too close for a readable foreground/background combination and works better as neighboring palette colors.
The main measurable differences between Iris and Slate Blue across RGB distance, luminance, hue, saturation, and contrast.
blue color
Iris is #5A4FCF, a cool blue with hue 245°, saturation 57% and luminance 0.1227. Beside Slate Blue, it is darker and more saturated. Of the two standard text choices, white text gives the higher contrast at 6.08:1.
blue color
Slate Blue is #6A5ACD, a cool blue with hue 248°, saturation 53% and luminance 0.1478. Beside Iris, it is lighter 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 Iris 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": "iris",
"name": "Iris",
"hex": "#5A4FCF",
"rgb": [
90,
79,
207
],
"hsl": [
245,
57,
56
],
"cmyk": [
57,
62,
0,
19
],
"family": "blue",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.1227,
"contrast": {
"black": 3.45,
"white": 6.08
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": []
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 6.08
},
"description": "Iris is #5A4FCF, a cool blue color with balanced character. Compared with Slate Blue, it is darker and more saturated. Use it for beauty branding, creative systems, and premium accents, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/iris/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/iris.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 Iris, it is lighter 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": 19.5,
"contrastRatio": 1.15,
"hslDelta": {
"hue": 3,
"saturation": 4,
"lightness": 2
},
"luminanceDelta": 0.0251,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [
"balanced"
],
"lighterColor": "Slate Blue",
"moreSaturatedColor": "Iris"
}{
"pairContrastRatio": 1.15,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Iris",
"background": "#5A4FCF",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 6.08
},
{
"color": "Slate Blue",
"background": "#6A5ACD",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 5.31
}
]
}{
"chooseFirstWhen": "Iris is better when the design needs balanced blue character, cool temperature, and the specific HEX value #5A4FCF.",
"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/iris-vs-slate-blue.json",
"https://www.colorsencyclopedia.com/api/colors/iris.json",
"https://www.colorsencyclopedia.com/api/colors/slate-blue.json"
]{
"datasetVersion": "1.0.0",
"slug": "iris-vs-slate-blue",
"type": "nearest",
"name": "Iris vs Slate Blue",
"verdict": "Iris and Slate Blue are very close colors. Slate Blue is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.15:1, so the pair is too low for text and better treated as a palette relationship.",
"summary": "Iris and Slate Blue are different blue colors with HEX values #5A4FCF and #6A5ACD. According to Colors Encyclopedia, their RGB distance is 19.5, their contrast ratio is 1.15:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
"rgbDistance": 19.5,
"contrastRatio": 1.15,
"colors": [
{
"slug": "iris",
"name": "Iris",
"hex": "#5A4FCF",
"rgb": [
90,
79,
207
],
"hsl": [
245,
57,
56
],
"cmyk": [
57,
62,
0,
19
],
"family": "blue",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.1227,
"contrast": {
"black": 3.45,
"white": 6.08
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": []
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 6.08
},
"description": "Iris is #5A4FCF, a cool blue color with balanced character. Compared with Slate Blue, it is darker and more saturated. Use it for beauty branding, creative systems, and premium accents, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/iris/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/iris.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 Iris, it is lighter 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": 19.5,
"contrastRatio": 1.15,
"hslDelta": {
"hue": 3,
"saturation": 4,
"lightness": 2
},
"luminanceDelta": 0.0251,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [
"balanced"
],
"lighterColor": "Slate Blue",
"moreSaturatedColor": "Iris"
},
"accessibility": {
"pairContrastRatio": 1.15,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Iris",
"background": "#5A4FCF",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 6.08
},
{
"color": "Slate Blue",
"background": "#6A5ACD",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 5.31
}
]
},
"useCases": {
"chooseFirstWhen": "Iris is better when the design needs balanced blue character, cool temperature, and the specific HEX value #5A4FCF.",
"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/iris-vs-slate-blue.json",
"https://www.colorsencyclopedia.com/api/colors/iris.json",
"https://www.colorsencyclopedia.com/api/colors/slate-blue.json"
],
"url": "https://www.colorsencyclopedia.com/compare/iris-vs-slate-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/compare/iris-vs-slate-blue.json"
}