Colors / blue
Windows Blue #3778BF
#3778BFoklch(0.5649 0.1288 252.8)
Windows Blue (#3778BF) is a medium moderately saturated blue. In OKLCH it has lightness 56.5%, chroma 0.129 and hue 252.8°; its relative luminance is 18.0%. White text reads best on it (APCA Lc 77, WCAG 4.56:1). It prints well on coated paper (FOGRA39, ΔE00 0.6).
#3778BF in every format
| HEX | #3778BF |
| RGB | rgb(55 120 191) |
| HSL | hsl(211.3 55.3% 48.2%) |
| HSB / HSV | hsb(211.3 71.2% 74.9%) |
| HWB | hwb(211.3 21.6% 25.1%) |
| CMYK (formula) | cmyk(71/37/0/25) |
| CMYK (FOGRA39 coated) | cmyk(78/48/0/0) |
| CIELAB (D50) | lab(48.85 -2.76 -44.09) |
| LCh | lch(48.85 44.18 266.4) |
| OKLab | oklab(0.5649 -0.0381 -0.1230) |
| OKLCH | oklch(0.5649 0.1288 252.8) |
| CIE XYZ (D65) | color(xyz-d65 0.17695 0.18006 0.51835) |
| CIE xyY | xyY(0.2021 0.2057 0.1801) |
| Display P3 | color(display-p3 0.2823 0.4648 0.7278) |
| Linear sRGB | color(srgb-linear 0.03820 0.18782 0.52100) |
| CSS name | — |
Text on #3778BF
White textWCAG 4.56:1 · APCA Lc 77
Black textWCAG 4.60:1 · APCA Lc 33
Color blindness
Tints and shades
#D9F1FF
#B1DBFF
#81C2FF
#67A8F3
#4E8FD8
#3577BD
#1B5FA3
#00478A
#003071
#001B54
#000734