Palettes / Colors / #285366
#285366 — Muted Blue
#285366 is a blue color we call Muted Blue, closest to the named color DarkSlateGray (#2F4F4F). It belongs to the blue family.
Color name
Closest CSS keyword: darkslategray (#2F4F4F) — not an exact match. CSS darkslategray gives you #2F4F4F, a different color; use #285366 when you need this exact shade.
Sources: common names follow widely used color-name references; CSS keywords and their hex values follow the CSS Color specification.
#285366 is a cool blue color associated with trust, calm and professionalism. It sits comfortably in the middle: usable for large areas in soft schemes, or as a supporting color beside something stronger.
Its strongest partner is its complement #673B28; it also sits naturally between #28675A and #283567. In the palettes below you can see it working alongside real color combinations from our collection.
Color values
| HEX | #285366 |
|---|---|
| RGB | 40, 83, 102 |
| HSL | 198°, 44%, 28% |
| HSV | 198°, 61%, 40% |
| CMYK | 61%, 19%, 0%, 60% |
| XYZ | 6.37, 7.60, 13.70 |
| Yxy | 7.60, 0.2301, 0.2746 |
| CIE-Lab | 33.13, -8.70, -15.52 |
| Hunter Lab | 27.56, -5.62, -12.13 |
RGB & CMYK percentages
Red 16% · Green 33% · Blue 40%
Cyan 61% · Magenta 19% · Yellow 0% · Key 60%
CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.
Previews
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CSS code for #285366
.text { color: #285366; }
.background { background-color: #285366; }
.border { border: 3px solid #285366; }
.text-rgb { color: rgb(40, 83, 102); }
.text-hsl { color: hsl(198, 44%, 28%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #285366; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(40, 83, 102, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #285366; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(40, 83, 102, 0.8); }
HTML: <p style="color:#285366">Text here</p> · <div style="background-color:#285366">Div content here</div>
Shades of #285366
Tints of #285366
Tones of #285366
Color harmonies
Complementary — #673B28:
Analogous:
Triadic:
Contrast & accessibility
| Against white text | 8.34:1 AAA |
|---|---|
| Against black text | 2.52:1 Fails |
Best text color on #285366: #FFFFFF.
Semi-transparent (opacity) text on #285366
Text set with opacity blends into the background, so its real contrast is lower than the solid ratios above. Choose a text color and an opacity to see the blended color and its true ratio:
Smaller body text shows the effect best.
Blended color: · Contrast against #285366: ·
How #285366 looks with color blindness
Simulated with standard Machado color-vision-deficiency matrices — useful when this color carries meaning in charts, maps or interfaces:
Closest design-system colors
The nearest matches in the Tailwind CSS, Material Design and Bootstrap palettes — handy when you need a framework class instead of a raw hex:
Palettes with a similar color
These palettes use a close neighbour of #285366 rather than the exact color:
Similar colors
The closest colors that actually appear in our palette collection — click any to open its page:
Browse neighbouring colors
Frequently asked questions
What color is #285366?
#285366 is Muted Blue, a blue color (RGB 40, 83, 102). Its closest standard named color is DarkSlateGray.
What is the RGB and HSL of #285366?
#285366 is RGB 40, 83, 102 — HSL 198°, 44%, 28% — CMYK 61%, 19%, 0%, 60%.
What colors go with #285366?
Its complement is #673B28; analogous partners are #28675A and #283567. It also appears in 6+ palettes in our collection.
Can I use #285366 for text?
White text on #285366 has a contrast ratio of 8.34:1 (passes WCAG AA); black text gives 2.52:1.