#399CDD
Blue
HEX
RGB
HSL
About #399CDD Blue
#399CDD is a blue color. In the RGB color model, it is composed of 57 red, 156 green, and 221 blue. In the HSL color space, it has a hue of 204°, saturation of 71%, and lightness of 55%.
This color has a medium lightness value, making it a balanced tone ideal for both text and UI elements. With high saturation, it appears vibrant and eye-catching.
CSS Code & Gradients
Use #399CDD in your CSS, SCSS, or Tailwind projects. Copy ready-to-use gradients.
Beautiful Gradients
Color Properties
204°
Hue
71%
Saturation
55%
Lightness
Blue
Color Harmonies
Colors that work well with #399CDD based on color theory.
Accessibility
WCAG 2.1 contrast ratio of #399CDD against white and black backgrounds.
Aa#399CDD on White
Contrast Ratio3.01:1
AA ✗AA Large ✓AAA ✗
Aa#399CDD on Black
Contrast Ratio6.97:1
AA ✓AA Large ✓AAA ✗
Color Conversion Table
Complete conversion of #399CDD across different color formats.
| Format | Value |
|---|---|
| HEX | #399CDD |
| RGB | rgb(57, 156, 221) |
| HSL | hsl(204, 71%, 55%) |
| RGB Decimal | 57, 156, 221 |
| RGB Percent | 22.4%, 61.2%, 86.7% |
| CMYK (approx.) | 74%, 29%, 0%, 13% |
Related Palettes
12 palettes using #399CDD or similar colors