Codes & values
- Color Name
Indigo 500 - Color ID
KDF-C-04149685 - HEX
#3F51B5 - RGB
rgb(63, 81, 181) - RGBA
rgba(63, 81, 181, 1) - HSL
hsl(231, 48%, 48%) - HSLA
hsla(231, 48%, 48%, 1) - HSV / HSB
hsv(231, 65%, 71%) - CMYK
cmyk(65%, 55%, 0%, 29%) - Light / Dark
mid
Quick answers
- What is the HEX code for Indigo 500?
- #3F51B5
- What is Indigo 500 RGB?
- rgb(63, 81, 181)
- What is Indigo 500 HSL?
- hsl(231, 48%, 48%)
- What is Indigo 500 CMYK?
- cmyk(65%, 55%, 0%, 29%)
What is Indigo 500?
Indigo 500 is a curated blue family color at #3F51B5. It appears in our library with tags for ui, web, design, button. This mid-range shade works as a primary brand or UI accent when contrast with text is verified. Temperature lean: cool — calmer, often used for tech, healthcare, and finance trust..
Indigo 500 HEX code
The HEX code for Indigo 500 is #3F51B5. Paste it into CSS as color: #3F51B5; or background-color: #3F51B5;. Design tools accept the same six-digit value without the # prefix (3f51b5).
Indigo 500 RGB
Indigo 500 in RGB is rgb(63, 81, 181) (channels R 63, G 81, B 181). Use RGB when you need opacity via rgba(63, 81, 181, 1).
Indigo 500 HSL & HSV
HSL is hsl(231, 48%, 48%) — useful for generating lighter/darker variants by adjusting lightness. HSV/HSB is hsv(231, 65%, 71%), closer to how many digital pickers expose hue, saturation, and brightness.
Indigo 500 CMYK
Approximate CMYK for Indigo 500 is cmyk(65%, 55%, 0%, 29%). Screen HEX/RGB values are device-dependent; for print, always soft-proof in your print profile rather than relying on a web conversion alone.
Shades of Indigo 500
Darker shades (mixed toward black): #354497, #2A3679, #20295B, #151B3C, #0A0D1E. Use deeper shades for hover states, borders, and dark-mode accents.
Tints of Indigo 500
Lighter tints (mixed toward white): #5F6EC1, #7F8BCE, #9FA8DA, #BFC5E6, #DFE2F3. Tints work well for soft backgrounds, chips, and secondary buttons.
Colors that go with Indigo 500
Complementary pairing: #3F51B5, #B5A33F. Analogous neighbors: #3F8CB5, #3F51B5, #683FB5. Triadic accents: #3F51B5, #B53F51, #51B53F. Always check text contrast when pairing.
Indigo 500 color combinations
A practical combo: primary #3F51B5, complementary accent #B5A33F, and a neutral charcoal or off-white for text and surfaces. Split-complementary options: #3F51B5, #B5683F, #8CB53F.
Indigo 500 in web design
Blue remains the default trust color for SaaS, finance, and health UI. Royal and navy blues anchor headers; sky blues soften backgrounds and links.
Indigo 500 in branding
Brand blues communicate reliability. Royal blue and navy remain corporate staples; electric blue reads more startup. Contrast vs white is 6.87:1 (passes WCAG AA for normal text); vs black 3.06:1.
Frequently asked questions
- What is the HEX code for Indigo 500?
- Indigo 500: #3F51B5.
- What is Indigo 500 RGB?
- Indigo 500: rgb(63, 81, 181).
- What is Indigo 500 HSL?
- Indigo 500: hsl(231, 48%, 48%).
- What is Indigo 500 CMYK?
- Indigo 500: cmyk(65%, 55%, 0%, 29%).
- What colors go with Indigo 500?
- Try complementary #3F51B5, #B5A33F or analogous #3F8CB5, #3F51B5, #683FB5.
- Is Indigo 500 good for text on white?
- Yes — contrast 6.87:1 meets WCAG AA for normal text.
Accessibility snapshot
Contrast vs white: 6.87:1 (AA body text pass). Contrast vs black: 3.06:1. Complementary swatch: #3F51B5, #B5A33F.
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