Nearest-color comparison
Ink Blue #003F5C vs Prussian Blue #003153: RGB distance 16.6 and contrast 1.19:1. Compare hue, luminance, saturation, WCAG and practical use.
Ink Blue and Prussian Blue are very close, with an RGB distance of 16.6. Ink Blue is lighter by 0.0151, and their saturation is equal. Their mutual contrast is 1.19:1. The pair is too close for a readable foreground/background combination and works better as neighboring palette colors.
The main measurable differences between Ink Blue and Prussian Blue across RGB distance, luminance, hue, saturation, and contrast.
blue color
Ink Blue is #003F5C, a cool blue with hue 199°, saturation 100% and luminance 0.0433. Beside Prussian Blue, it is lighter and equally saturated. Of the two standard text choices, white text gives the higher contrast at 11.25:1.
blue color
Prussian Blue is #003153, a cool blue with hue 205°, saturation 100% and luminance 0.0282. Beside Ink Blue, it is darker and equally saturated. Of the two standard text choices, white text gives the higher contrast at 13.43:1.
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 Ink Blue and Prussian 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": "ink-blue",
"name": "Ink Blue",
"hex": "#003F5C",
"rgb": [
0,
63,
92
],
"hsl": [
199,
100,
18
],
"cmyk": [
100,
32,
0,
64
],
"family": "blue",
"temperature": "cool",
"tone": [
"dark",
"jewel-tone"
],
"luminance": 0.0433,
"contrast": {
"black": 1.87,
"white": 11.25
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 11.25
},
"description": "Ink Blue is #003F5C, a cool blue color with dark and jewel tone character. Compared with Prussian Blue, it is lighter and similar in saturation. Use it for interfaces, brand systems, and technical design, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/ink-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/ink-blue.json"
},
{
"slug": "prussian-blue",
"name": "Prussian Blue",
"hex": "#003153",
"rgb": [
0,
49,
83
],
"hsl": [
205,
100,
16
],
"cmyk": [
100,
41,
0,
67
],
"family": "blue",
"temperature": "cool",
"tone": [
"dark",
"jewel-tone"
],
"luminance": 0.0282,
"contrast": {
"black": 1.56,
"white": 13.43
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 13.43
},
"description": "Prussian Blue is #003153, a cool blue color with dark and jewel tone character. Compared with Ink Blue, it is darker and similar in saturation. Use it for interfaces, brand systems, and technical design, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/prussian-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/prussian-blue.json"
}
]{
"rgbDistance": 16.6,
"contrastRatio": 1.19,
"hslDelta": {
"hue": 6,
"saturation": 0,
"lightness": 2
},
"luminanceDelta": 0.0151,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [
"dark",
"jewel-tone"
],
"lighterColor": "Ink Blue",
"moreSaturatedColor": "Ink Blue"
}{
"pairContrastRatio": 1.19,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Ink Blue",
"background": "#003F5C",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 11.25
},
{
"color": "Prussian Blue",
"background": "#003153",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 13.43
}
]
}{
"chooseFirstWhen": "Ink Blue is better when the design needs dark and jewel tone blue character, cool temperature, and the specific HEX value #003F5C.",
"chooseSecondWhen": "Prussian Blue is better when the design needs dark and jewel tone blue character, cool temperature, and the specific HEX value #003153.",
"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/ink-blue-vs-prussian-blue.json",
"https://www.colorsencyclopedia.com/api/colors/ink-blue.json",
"https://www.colorsencyclopedia.com/api/colors/prussian-blue.json"
]{
"datasetVersion": "1.0.0",
"slug": "ink-blue-vs-prussian-blue",
"type": "nearest",
"name": "Ink Blue vs Prussian Blue",
"verdict": "Ink Blue and Prussian Blue are very close colors. Ink Blue is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.19:1, so the pair is too low for text and better treated as a palette relationship.",
"summary": "Ink Blue and Prussian Blue are different blue colors with HEX values #003F5C and #003153. According to Colors Encyclopedia, their RGB distance is 16.6, their contrast ratio is 1.19:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
"rgbDistance": 16.6,
"contrastRatio": 1.19,
"colors": [
{
"slug": "ink-blue",
"name": "Ink Blue",
"hex": "#003F5C",
"rgb": [
0,
63,
92
],
"hsl": [
199,
100,
18
],
"cmyk": [
100,
32,
0,
64
],
"family": "blue",
"temperature": "cool",
"tone": [
"dark",
"jewel-tone"
],
"luminance": 0.0433,
"contrast": {
"black": 1.87,
"white": 11.25
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 11.25
},
"description": "Ink Blue is #003F5C, a cool blue color with dark and jewel tone character. Compared with Prussian Blue, it is lighter and similar in saturation. Use it for interfaces, brand systems, and technical design, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/ink-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/ink-blue.json"
},
{
"slug": "prussian-blue",
"name": "Prussian Blue",
"hex": "#003153",
"rgb": [
0,
49,
83
],
"hsl": [
205,
100,
16
],
"cmyk": [
100,
41,
0,
67
],
"family": "blue",
"temperature": "cool",
"tone": [
"dark",
"jewel-tone"
],
"luminance": 0.0282,
"contrast": {
"black": 1.56,
"white": 13.43
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 13.43
},
"description": "Prussian Blue is #003153, a cool blue color with dark and jewel tone character. Compared with Ink Blue, it is darker and similar in saturation. Use it for interfaces, brand systems, and technical design, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/prussian-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/prussian-blue.json"
}
],
"differences": {
"rgbDistance": 16.6,
"contrastRatio": 1.19,
"hslDelta": {
"hue": 6,
"saturation": 0,
"lightness": 2
},
"luminanceDelta": 0.0151,
"sameFamily": true,
"sameTemperature": true,
"sharedTones": [
"dark",
"jewel-tone"
],
"lighterColor": "Ink Blue",
"moreSaturatedColor": "Ink Blue"
},
"accessibility": {
"pairContrastRatio": 1.19,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Ink Blue",
"background": "#003F5C",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 11.25
},
{
"color": "Prussian Blue",
"background": "#003153",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 13.43
}
]
},
"useCases": {
"chooseFirstWhen": "Ink Blue is better when the design needs dark and jewel tone blue character, cool temperature, and the specific HEX value #003F5C.",
"chooseSecondWhen": "Prussian Blue is better when the design needs dark and jewel tone blue character, cool temperature, and the specific HEX value #003153.",
"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/ink-blue-vs-prussian-blue.json",
"https://www.colorsencyclopedia.com/api/colors/ink-blue.json",
"https://www.colorsencyclopedia.com/api/colors/prussian-blue.json"
],
"url": "https://www.colorsencyclopedia.com/compare/ink-blue-vs-prussian-blue/",
"apiUrl": "https://www.colorsencyclopedia.com/api/compare/ink-blue-vs-prussian-blue.json"
}