Palettes / Colors / #331F88
#331F88 — Blue
#331F88 is a blue color we call Blue, closest to the named color MidnightBlue (#191970). It belongs to the blue family.
Color name
Closest CSS keyword: midnightblue (#191970) — not an exact match. CSS midnightblue gives you #191970, a different color; use #331F88 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.
#331F88 is a cool blue color associated with trust, calm and professionalism. It is saturated enough to be the accent — buttons, highlights and calls to action — while neutrals do the quiet work around it.
Its strongest partner is its complement #76891F; it also sits naturally between #1F4189 and #681F89. In the palettes below you can see it working alongside real color combinations from our collection.
Color values
| HEX | #331F88 |
|---|---|
| RGB | 51, 31, 136 |
| HSL | 251°, 63%, 33% |
| HSV | 251°, 77%, 53% |
| CMYK | 63%, 77%, 0%, 47% |
| XYZ | 6.30, 3.46, 23.63 |
| Yxy | 3.46, 0.1887, 0.1037 |
| CIE-Lab | 21.80, 39.39, -55.01 |
| Hunter Lab | 18.60, 29.33, -65.72 |
RGB & CMYK percentages
Red 20% · Green 12% · Blue 53%
Cyan 63% · Magenta 77% · Yellow 0% · Key 47%
CMYK values are unprofiled approximations for screen reference — not a print-proofing guarantee.
Previews
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CSS code for #331F88
.text { color: #331F88; }
.background { background-color: #331F88; }
.border { border: 3px solid #331F88; }
.text-rgb { color: rgb(51, 31, 136); }
.text-hsl { color: hsl(251, 63%, 33%); }
.text-shadow-hex { text-shadow: 4px 4px 2px #331F88; }
.text-shadow-rgba { text-shadow: 4px 4px 2px rgba(51, 31, 136, 0.8); }
.box-shadow-hex { box-shadow: 1px 1px 3px 2px #331F88; }
.box-shadow-rgba { box-shadow: 1px 1px 3px 2px rgba(51, 31, 136, 0.8); }
HTML: <p style="color:#331F88">Text here</p> · <div style="background-color:#331F88">Div content here</div>
Shades of #331F88
Tints of #331F88
Tones of #331F88
Color harmonies
Complementary — #76891F:
Analogous:
Triadic:
Contrast & accessibility
| Against white text | 12.41:1 AAA |
|---|---|
| Against black text | 1.69:1 Fails |
Best text color on #331F88: #FFFFFF.
Semi-transparent (opacity) text on #331F88
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 #331F88: ·
How #331F88 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 #331F88 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 #331F88?
#331F88 is Blue, a blue color (RGB 51, 31, 136). Its closest standard named color is MidnightBlue.
What is the RGB and HSL of #331F88?
#331F88 is RGB 51, 31, 136 — HSL 251°, 63%, 33% — CMYK 63%, 77%, 0%, 47%.
What colors go with #331F88?
Its complement is #76891F; analogous partners are #1F4189 and #681F89. It also appears in 6+ palettes in our collection.
Can I use #331F88 for text?
White text on #331F88 has a contrast ratio of 12.41:1 (passes WCAG AA); black text gives 1.69:1.