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Colour

#2A3779

  • #2A3779
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2A3779 is a blue with RGB values 42, 55, 121 and HSL 230°, 48%, 32%. It is a dark colour, so white text on it reaches 10.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2A3779#2A3779
HEX#2A3779
RGBrgb(42, 55, 121)
RGB (0–1)0.1647, 0.2157, 0.4745
RGB percentages16.5%, 21.6%, 47.5%
HSLhsl(230.1, 48.5%, 32%)
HSV / HSBhsv(230.1, 65.3%, 47.5%)
CMYK65.3%, 54.5%, 0%, 52.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,766,713
CSS custom property--colour: #2A3779;

Brightness & contrast

Relative luminance0.04605WCAG 2.x, 0 is black and 1 is white
Perceived brightness63 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.93:1
Contrast with white10.93:1WCAG normal text: AAA
Contrast with black1.92:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#D5C886

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0E407Bno red cones; affects about 1% of men; ΔE 9.6 from the original
Deuteranopia#003978no green cones; the most common form, about 1% of men; ΔE 6.9 from the original
Tritanopia#004652no blue cones; rare, and affects men and women equally; ΔE 41.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.93:1WCAG large text: AAA
Contrast with black, large text1.92:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 10.5Midnight blue · ΔE 20.1Rebecca purple · ΔE 27.7Slate blue · ΔE 32.8Steel blue · ΔE 35.1Royal blue · ΔE 35.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 10.54, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#796C2A
Analogous#2A5E79, #452A79
Triadic#792A37, #37792A
Split complementary#79452A, #5E792A
Tetradic#792A5E, #796C2A, #2A7945

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#95A0DA
Lighter +30%#6F7ECD
Lighter +20%#495DC0
Lighter +10%#37489F
Darker −10%#1D2653
Darker −20%#10152D
Darker −30%#030307
Darker −40%#000000
More saturated +25%#16298D
Less saturated −25%#3E4565

Channel breakdown

R42
G55
B121
Red42 (16.5%)
Green55 (21.6%)
Blue121 (47.5%)
Hue230.13°
Saturation (HSL)48.47%
Lightness31.96%
Dominant channelBlue
Hex per channelR 2A · G 37 · B 79

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Every value on this page was computed from “2a3779” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.