Palettes / Colors / #355DBB
#355DBB — Blue
#355DBB is a blue color we call Blue, closest to the named color SteelBlue (#4682B4). It belongs to the blue family.
Color name
Closest CSS keyword: steelblue (#4682B4) — not an exact match. CSS steelblue gives you #4682B4, a different color; use #355DBB 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.
#355DBB 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 #BB9335; it also sits naturally between #35A0BB and #5035BB. In the palettes below you can see it working alongside real color combinations from our collection.
Color values
| HEX | #355DBB |
|---|---|
| RGB | 53, 93, 187 |
| HSL | 222°, 56%, 47% |
| HSV | 222°, 72%, 73% |
| CMYK | 72%, 50%, 0%, 27% |
| XYZ | 14.35, 12.17, 48.61 |
| Yxy | 12.17, 0.1910, 0.1620 |
| CIE-Lab | 41.49, 18.45, -53.73 |
| Hunter Lab | 34.89, 14.46, -62.38 |
RGB & CMYK percentages
Red 21% · Green 36% · Blue 73%
Cyan 72% · Magenta 50% · Yellow 0% · Key 27%
CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.
Previews
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CSS code for #355DBB
.text { color: #355DBB; }
.background { background-color: #355DBB; }
.border { border: 3px solid #355DBB; }
.text-rgb { color: rgb(53, 93, 187); }
.text-hsl { color: hsl(222, 56%, 47%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #355DBB; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(53, 93, 187, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #355DBB; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(53, 93, 187, 0.8); }
HTML: <p style="color:#355DBB">Text here</p> · <div style="background-color:#355DBB">Div content here</div>
Shades of #355DBB
Tints of #355DBB
Tones of #355DBB
Color harmonies
Complementary — #BB9335:
Analogous:
Triadic:
Contrast & accessibility
| Against white text | 6.11:1 AA |
|---|---|
| Against black text | 3.43:1 AA large only |
Best text color on #355DBB: #FFFFFF.
Semi-transparent (opacity) text on #355DBB
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 #355DBB: ·
How #355DBB 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 #355DBB 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 #355DBB?
#355DBB is Blue, a blue color (RGB 53, 93, 187). Its closest standard named color is SteelBlue.
What is the RGB and HSL of #355DBB?
#355DBB is RGB 53, 93, 187 — HSL 222°, 56%, 47% — CMYK 72%, 50%, 0%, 27%.
What colors go with #355DBB?
Its complement is #BB9335; analogous partners are #35A0BB and #5035BB. It also appears in 6+ palettes in our collection.
Can I use #355DBB for text?
White text on #355DBB has a contrast ratio of 6.11:1 (passes WCAG AA); black text gives 3.43:1.