Nearest-color comparison
Royal Purple #7851A9 vs Amethyst Deep #5D3A9B: RGB distance 38.1 and contrast 1.39:1. Compare hue, luminance, saturation, WCAG and practical use.
Royal Purple and Amethyst Deep are related but distinguishable, with an RGB distance of 38.1. Royal Purple is lighter by 0.0502, and Amethyst Deep is more saturated by 11 percentage points. Their mutual contrast is 1.39:1. The pair is too close for a readable foreground/background combination and works better as neighboring palette colors.
The main measurable differences between Royal Purple and Amethyst Deep across RGB distance, luminance, hue, saturation, and contrast.
purple color
Royal Purple is #7851A9, a cool purple with hue 267°, saturation 35% and luminance 0.1274. Beside Amethyst Deep, it is lighter and less saturated. Of the two standard text choices, white text gives the higher contrast at 5.92:1.
purple color
Amethyst Deep is #5D3A9B, a cool purple with hue 262°, saturation 46% and luminance 0.0772. Beside Royal Purple, it is darker and more saturated. Of the two standard text choices, white text gives the higher contrast at 8.25:1.
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 Royal Purple and Amethyst Deep, 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": "royal-purple",
"name": "Royal Purple",
"hex": "#7851A9",
"rgb": [
120,
81,
169
],
"hsl": [
267,
35,
49
],
"cmyk": [
29,
52,
0,
34
],
"family": "purple",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.1274,
"contrast": {
"black": 3.55,
"white": 5.92
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": []
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 5.92
},
"description": "Royal Purple is #7851A9, a cool purple color with balanced character. Compared with Amethyst Deep, it is lighter and less 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/royal-purple/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/royal-purple.json"
},
{
"slug": "amethyst-deep",
"name": "Amethyst Deep",
"hex": "#5D3A9B",
"rgb": [
93,
58,
155
],
"hsl": [
262,
46,
42
],
"cmyk": [
40,
63,
0,
39
],
"family": "purple",
"temperature": "cool",
"tone": [
"jewel-tone"
],
"luminance": 0.0772,
"contrast": {
"black": 2.54,
"white": 8.25
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 8.25
},
"description": "Amethyst Deep is #5D3A9B, a cool purple color with jewel tone character. Compared with Royal Purple, it is darker and more 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/amethyst-deep/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/amethyst-deep.json"
}
]{
"rgbDistance": 38.1,
"contrastRatio": 1.39,
"hslDelta": {
"hue": 5,
"saturation": 11,
"lightness": 7
},
"luminanceDelta": 0.0502,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [],
"lighterColor": "Royal Purple",
"moreSaturatedColor": "Amethyst Deep"
}{
"pairContrastRatio": 1.39,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Royal Purple",
"background": "#7851A9",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 5.92
},
{
"color": "Amethyst Deep",
"background": "#5D3A9B",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 8.25
}
]
}{
"chooseFirstWhen": "Royal Purple is better when the design needs balanced purple character, cool temperature, and the specific HEX value #7851A9.",
"chooseSecondWhen": "Amethyst Deep is better when the design needs jewel tone purple character, cool temperature, and the specific HEX value #5D3A9B.",
"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/royal-purple-vs-amethyst-deep.json",
"https://www.colorsencyclopedia.com/api/colors/royal-purple.json",
"https://www.colorsencyclopedia.com/api/colors/amethyst-deep.json"
]{
"datasetVersion": "1.0.0",
"slug": "royal-purple-vs-amethyst-deep",
"type": "nearest",
"name": "Royal Purple vs Amethyst Deep",
"verdict": "Royal Purple and Amethyst Deep are visually related colors. Royal Purple is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.39:1, so the pair is too low for text and better treated as a palette relationship.",
"summary": "Royal Purple and Amethyst Deep are different purple colors with HEX values #7851A9 and #5D3A9B. According to Colors Encyclopedia, their RGB distance is 38.1, their contrast ratio is 1.39:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
"rgbDistance": 38.1,
"contrastRatio": 1.39,
"colors": [
{
"slug": "royal-purple",
"name": "Royal Purple",
"hex": "#7851A9",
"rgb": [
120,
81,
169
],
"hsl": [
267,
35,
49
],
"cmyk": [
29,
52,
0,
34
],
"family": "purple",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.1274,
"contrast": {
"black": 3.55,
"white": 5.92
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": []
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 5.92
},
"description": "Royal Purple is #7851A9, a cool purple color with balanced character. Compared with Amethyst Deep, it is lighter and less 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/royal-purple/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/royal-purple.json"
},
{
"slug": "amethyst-deep",
"name": "Amethyst Deep",
"hex": "#5D3A9B",
"rgb": [
93,
58,
155
],
"hsl": [
262,
46,
42
],
"cmyk": [
40,
63,
0,
39
],
"family": "purple",
"temperature": "cool",
"tone": [
"jewel-tone"
],
"luminance": 0.0772,
"contrast": {
"black": 2.54,
"white": 8.25
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 8.25
},
"description": "Amethyst Deep is #5D3A9B, a cool purple color with jewel tone character. Compared with Royal Purple, it is darker and more 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/amethyst-deep/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/amethyst-deep.json"
}
],
"differences": {
"rgbDistance": 38.1,
"contrastRatio": 1.39,
"hslDelta": {
"hue": 5,
"saturation": 11,
"lightness": 7
},
"luminanceDelta": 0.0502,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [],
"lighterColor": "Royal Purple",
"moreSaturatedColor": "Amethyst Deep"
},
"accessibility": {
"pairContrastRatio": 1.39,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Royal Purple",
"background": "#7851A9",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 5.92
},
{
"color": "Amethyst Deep",
"background": "#5D3A9B",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 8.25
}
]
},
"useCases": {
"chooseFirstWhen": "Royal Purple is better when the design needs balanced purple character, cool temperature, and the specific HEX value #7851A9.",
"chooseSecondWhen": "Amethyst Deep is better when the design needs jewel tone purple character, cool temperature, and the specific HEX value #5D3A9B.",
"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/royal-purple-vs-amethyst-deep.json",
"https://www.colorsencyclopedia.com/api/colors/royal-purple.json",
"https://www.colorsencyclopedia.com/api/colors/amethyst-deep.json"
],
"url": "https://www.colorsencyclopedia.com/compare/royal-purple-vs-amethyst-deep/",
"apiUrl": "https://www.colorsencyclopedia.com/api/compare/royal-purple-vs-amethyst-deep.json"
}