Curious Blue

Q: How do I use #00A4EF in CSS?

You can use #00A4EF in CSS with: background-color: #00A4EF; or color: #00A4EF; or as an RGB value: rgb(0, 164, 239). For print design, use CMYK: 100%, 31%, 0%, 6%.

#00A4EF aka “Microsoft Blue” by Microsoft

Curious Blue is a cool medium color with the hex code #00A4EF. Also known as "Microsoft Blue" by Microsoft . This vibrant hue can be represented as RGB 0, 164, 239 in digital design or CMYK 100%, 31%, 0%, 6% for print applications. Find matching Pantone color. Currently, 1 brand uses this color in their visual identity, making it a proven choice for professional branding and web design.

Curious Blue color values

HEX: #00A4EF
RGB: 0, 164, 239
HSL: 199°, 100%, 47%
CMYK: 100, 31, 0, 6

Shades & tints

Darker Lighter

About this color

Curious Blue sits at 199° on the color wheel with 100% saturation and 47% lightness, placing it in the blue segment of the spectrum. With saturation at 100%, this is a high-chroma color: the kind that anchors palettes and demands considered placement. Its mid-range lightness positions it as a mid-tone: neither a background color nor a deep accent, but something in between.

In digital environments, Curious Blue is rendered as rgb(0, 164, 239), where the blue channel is highest at 239, producing a strongly blue character. The mid-range lightness and strong saturation make this versatile for both foreground and background roles, depending on what it is paired against.

For print, Curious Blue translates to a CMYK breakdown of 100C 31M 0Y 6K. The low-to-moderate black value (6%) means the color's character in print comes primarily from its cyan ink content (100%), with black serving as a supporting shadow tone. In brand applications, this exact value is specified as Microsoft Blue.

Color harmonies

Complementary

Analogous

Triadic

Split-Complementary

How to use Curious Blue

CSS Variable

:root {
  --brand-primary: #00A4EF;
  --brand-primary-rgb: 0, 164, 239;
}

Define as a CSS custom property for consistent theming across your site.

Tailwind Config

colors: {
  brand: '#00A4EF',
}

Add to your Tailwind config to use classes like bg-brand.

Print Design (CMYK)

C: 100%
M: 31%
Y: 0%
K: 6%

Use these CMYK values in Adobe Illustrator, InDesign, or print specifications.

RGB for Screens

rgb(0, 164, 239)
rgba(0, 164, 239, 0.8)

Use RGB notation for compatibility or add alpha channel for transparency.

Brands using Curious Blue

1 brand uses this color in their identity

Microsoft

Technology • In-house Microsoft

Brands using similar hue

24 brand s with colors near 199° on the color wheel

Frequently asked questions

What color is #00A4EF?

#00A4EF is Curious Blue, a cool medium color with RGB values of 0, 164, 239. It has a hue of 199°, 100% saturation, and 47% lightness in the HSL color space.

What is the RGB value of #00A4EF?

The RGB color code for #00A4EF is rgb(0, 164, 239). This means it contains 0 red, 164 green, and 239 blue in the RGB color model.

Is Curious Blue a warm or cool color?

Curious Blue (#00A4EF) is a cool color with a hue between 120-300° on the color wheel.

How do I use #00A4EF in CSS?

You can use #00A4EF in CSS with: background-color: #00A4EF; or color: #00A4EF; or as an RGB value: rgb(0, 164, 239). For print design, use CMYK: 100%, 31%, 0%, 6%.