Recognised as Colour
#391F99
- #391F99
- Blue
- Dark
- Nearest: Indigo
#391F99 is a blue with RGB values 57, 31, 153 and HSL 253°, 66%, 36%. It is a dark colour, so white text on it reaches 11.5:1 contrast (AAA for normal text). The nearest named colour is Indigo.
Colour values
#391F99#391F99
HEX#391F99
RGBrgb(57, 31, 153)
RGB (0–1)0.2235, 0.1216, 0.6
RGB percentages22.4%, 12.2%, 60%
HSLhsl(252.8, 66.3%, 36.1%)
HSV / HSBhsv(252.8, 79.7%, 60%)
CMYK62.7%, 79.7%, 0%, 40%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,743,641
CSS custom property--colour: #391F99;
Brightness & contrast
Relative luminance0.0415WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.48:1
Contrast with white11.48:1WCAG normal text: AAA
Contrast with black1.83:1WCAG normal text: Fail
Greyscale equivalent#2D2D2D
Inverted#C6E066
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.48:1WCAG large text: AAA
Contrast with black, large text1.83:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#7F991F
Analogous#1F4299, #761F99
Triadic#99391F, #1F9939
Split complementary#99761F, #42991F
Tetradic#991F42, #7F991F, #1F9976
Tints, shades & saturation
Channel breakdown
R57
G31
B153
Red57 (22.4%)
Green31 (12.2%)
Blue153 (60%)
Hue252.79°
Saturation (HSL)66.3%
Lightness36.08%
Dominant channelBlue
Hex per channelR 39 · G 1F · B 99
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Nerdulate something else
Nothing in mind? Surprise me · today’s page