Nerdulator> put something in

Recognised as Colour

#311C87

  • #311C87
  • Blue
  • Dark
  • Nearest: Indigo

#311C87 is a blue with RGB values 49, 28, 135 and HSL 252°, 66%, 32%. It is a dark colour, so white text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Indigo.

Colour values

#311C87#311C87
HEX#311C87
RGBrgb(49, 28, 135)
RGB (0–1)0.1922, 0.1098, 0.5294
RGB percentages19.2%, 11%, 52.9%
HSLhsl(251.8, 65.6%, 32%)
HSV / HSBhsv(251.8, 79.3%, 52.9%)
CMYK63.7%, 79.3%, 0%, 47.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,218,567
CSS custom property--colour: #311C87;

Brightness & contrast

Relative luminance0.03233WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.75:1
Contrast with white12.75:1WCAG normal text: AAA
Contrast with black1.65:1WCAG normal text: Fail
Greyscale equivalent#282828
Inverted#CEE378

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00368Ano red cones; affects about 1% of men; ΔE 20.9 from the original
Deuteranopia#002F85no green cones; the most common form, about 1% of men; ΔE 17.6 from the original
Tritanopia#003B51no blue cones; rare, and affects men and women equally; ΔE 61.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.75:1WCAG large text: AAA
Contrast with black, large text1.65:1WCAG large text: Fail

Named colours

Indigo · ΔE 11.6Midnight blue · ΔE 11.8Navy · ΔE 13.9Rebecca purple · ΔE 15Dark blue · ΔE 17.5Dark slateblue · ΔE 22.2
Nearest named CSS colourIndigo (#4B0082)ΔE 11.56, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#72871C
Analogous#1C3D87, #661C87
Triadic#87311C, #1C8731
Split complementary#87671C, #3C871C
Tetradic#871C3D, #72871C, #1C8766

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9B89E6
Lighter +30%#775EDE
Lighter +20%#5434D5
Lighter +10%#4025B1
Darker −10%#22135D
Darker −20%#120A33
Darker −30%#030208
Darker −40%#000000
More saturated +25%#25089B
Less saturated −25%#3D3073

Channel breakdown

R49
G28
B135
Red49 (19.2%)
Green28 (11%)
Blue135 (52.9%)
Hue251.78°
Saturation (HSL)65.64%
Lightness31.96%
Dominant channelBlue
Hex per channelR 31 · G 1C · B 87

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

Every value on this page was computed from “311c87” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.