Nearest-color comparison
Slate Navy #30475E vs Dark Slate Gray #2F4F4F: RGB distance 17 and contrast 1.07:1. Compare hue, luminance, saturation, WCAG and practical use.
Slate Navy and Dark Slate Gray are very close, with an RGB distance of 17. Dark Slate Gray is lighter by 0.0082, and Slate Navy is more saturated by 7 percentage points. Their mutual contrast is 1.07:1. The pair is too close for a readable foreground/background combination and works better as neighboring palette colors.
The main measurable differences between Slate Navy and Dark Slate Gray across RGB distance, luminance, hue, saturation, and contrast.
blue color
Slate Navy is #30475E, a cool blue with hue 210°, saturation 32% and luminance 0.0594. Beside Dark Slate Gray, it is darker and more saturated. Of the two standard text choices, white text gives the higher contrast at 9.6:1.
cyan color
Dark Slate Gray is #2F4F4F, a cool cyan with hue 180°, saturation 25% and luminance 0.0676. Beside Slate Navy, it is lighter and less saturated. Of the two standard text choices, white text gives the higher contrast at 8.93:1.
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 Slate Navy and Dark Slate Gray, 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": "slate-navy",
"name": "Slate Navy",
"hex": "#30475E",
"rgb": [
48,
71,
94
],
"hsl": [
210,
32,
28
],
"cmyk": [
49,
24,
0,
63
],
"family": "blue",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.0594,
"contrast": {
"black": 2.19,
"white": 9.6
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 9.6
},
"description": "Slate Navy is #30475E, a cool blue color with balanced character. Compared with Dark Slate Gray, it is darker and more saturated. Use it for interfaces, brand systems, and technical design, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/slate-navy/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-navy.json"
},
{
"slug": "dark-slate-gray",
"name": "Dark Slate Gray",
"hex": "#2F4F4F",
"rgb": [
47,
79,
79
],
"hsl": [
180,
25,
25
],
"cmyk": [
41,
0,
0,
69
],
"family": "cyan",
"temperature": "cool",
"tone": [
"muted"
],
"luminance": 0.0676,
"contrast": {
"black": 2.35,
"white": 8.93
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 8.93
},
"description": "Dark Slate Gray is #2F4F4F, a cool cyan color with muted character. Compared with Slate Navy, 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/dark-slate-gray/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/dark-slate-gray.json"
}
]{
"rgbDistance": 17,
"contrastRatio": 1.07,
"hslDelta": {
"hue": 30,
"saturation": 7,
"lightness": 3
},
"luminanceDelta": 0.0082,
"sameFamily": false,
"sameTemperature": true,
"sharedTones": [],
"lighterColor": "Dark Slate Gray",
"moreSaturatedColor": "Slate Navy"
}{
"pairContrastRatio": 1.07,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Slate Navy",
"background": "#30475E",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 9.6
},
{
"color": "Dark Slate Gray",
"background": "#2F4F4F",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 8.93
}
]
}{
"chooseFirstWhen": "Slate Navy is better when the design needs balanced blue character, cool temperature, and the specific HEX value #30475E.",
"chooseSecondWhen": "Dark Slate Gray is better when the design needs muted cyan character, cool temperature, and the specific HEX value #2F4F4F.",
"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/slate-navy-vs-dark-slate-gray.json",
"https://www.colorsencyclopedia.com/api/colors/slate-navy.json",
"https://www.colorsencyclopedia.com/api/colors/dark-slate-gray.json"
]{
"datasetVersion": "1.0.0",
"slug": "slate-navy-vs-dark-slate-gray",
"type": "nearest",
"name": "Slate Navy vs Dark Slate Gray",
"verdict": "Slate Navy and Dark Slate Gray are very close colors. Dark Slate Gray is the lighter option. They share similar temperature behavior. Their mutual contrast is 1.07:1, so the pair is too low for text and better treated as a palette relationship.",
"summary": "Slate Navy and Dark Slate Gray are different blue and cyan colors with HEX values #30475E and #2F4F4F. According to Colors Encyclopedia, their RGB distance is 17, their contrast ratio is 1.07:1, and the comparison helps choose between tone, temperature, and accessibility behavior.",
"rgbDistance": 17,
"contrastRatio": 1.07,
"colors": [
{
"slug": "slate-navy",
"name": "Slate Navy",
"hex": "#30475E",
"rgb": [
48,
71,
94
],
"hsl": [
210,
32,
28
],
"cmyk": [
49,
24,
0,
63
],
"family": "blue",
"temperature": "cool",
"tone": [
"balanced"
],
"luminance": 0.0594,
"contrast": {
"black": 2.19,
"white": 9.6
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 9.6
},
"description": "Slate Navy is #30475E, a cool blue color with balanced character. Compared with Dark Slate Gray, it is darker and more saturated. Use it for interfaces, brand systems, and technical design, with white text as the safer foreground option.",
"url": "https://www.colorsencyclopedia.com/colors/slate-navy/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/slate-navy.json"
},
{
"slug": "dark-slate-gray",
"name": "Dark Slate Gray",
"hex": "#2F4F4F",
"rgb": [
47,
79,
79
],
"hsl": [
180,
25,
25
],
"cmyk": [
41,
0,
0,
69
],
"family": "cyan",
"temperature": "cool",
"tone": [
"muted"
],
"luminance": 0.0676,
"contrast": {
"black": 2.35,
"white": 8.93
},
"wcag": {
"AA": [
"#FFFFFF",
"#F5F5F5"
],
"AAA": [
"#FFFFFF",
"#F5F5F5"
]
},
"bestText": {
"text": "#FFFFFF",
"label": "white text",
"ratio": 8.93
},
"description": "Dark Slate Gray is #2F4F4F, a cool cyan color with muted character. Compared with Slate Navy, 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/dark-slate-gray/",
"apiUrl": "https://www.colorsencyclopedia.com/api/colors/dark-slate-gray.json"
}
],
"differences": {
"rgbDistance": 17,
"contrastRatio": 1.07,
"hslDelta": {
"hue": 30,
"saturation": 7,
"lightness": 3
},
"luminanceDelta": 0.0082,
"sameFamily": false,
"sameTemperature": true,
"sharedTones": [],
"lighterColor": "Dark Slate Gray",
"moreSaturatedColor": "Slate Navy"
},
"accessibility": {
"pairContrastRatio": 1.07,
"textRecommendation": "Do not use this pair for text; use it for neighboring palette colors, decoration, or low-emphasis surfaces.",
"safeText": [
{
"color": "Slate Navy",
"background": "#30475E",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 9.6
},
{
"color": "Dark Slate Gray",
"background": "#2F4F4F",
"foreground": "#FFFFFF",
"label": "white text",
"ratio": 8.93
}
]
},
"useCases": {
"chooseFirstWhen": "Slate Navy is better when the design needs balanced blue character, cool temperature, and the specific HEX value #30475E.",
"chooseSecondWhen": "Dark Slate Gray is better when the design needs muted cyan character, cool temperature, and the specific HEX value #2F4F4F.",
"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/slate-navy-vs-dark-slate-gray.json",
"https://www.colorsencyclopedia.com/api/colors/slate-navy.json",
"https://www.colorsencyclopedia.com/api/colors/dark-slate-gray.json"
],
"url": "https://www.colorsencyclopedia.com/compare/slate-navy-vs-dark-slate-gray/",
"apiUrl": "https://www.colorsencyclopedia.com/api/compare/slate-navy-vs-dark-slate-gray.json"
}