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Recognised as Colour

#3A40AC

  • #3A40AC
  • Blue
  • Dark
  • Nearest: Slate blue

#3A40AC is a blue with RGB values 58, 64, 172 and HSL 237°, 50%, 45%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#3A40AC#3A40AC
HEX#3A40AC
RGBrgb(58, 64, 172)
RGB (0–1)0.2275, 0.251, 0.6745
RGB percentages22.7%, 25.1%, 67.5%
HSLhsl(236.8, 49.6%, 45.1%)
HSV / HSBhsv(236.8, 66.3%, 67.5%)
CMYK66.3%, 62.8%, 0%, 32.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,817,644
CSS custom property--colour: #3A40AC;

Brightness & contrast

Relative luminance0.07545WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.37:1
Contrast with white8.37:1WCAG normal text: AAA
Contrast with black2.51:1WCAG normal text: Fail
Greyscale equivalent#474747
Inverted#C5BF53

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0053AFno red cones; affects about 1% of men; ΔE 17.3 from the original
Deuteranopia#0049AAno green cones; the most common form, about 1% of men; ΔE 11.9 from the original
Tritanopia#005B70no blue cones; rare, and affects men and women equally; ΔE 62.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.37:1WCAG large text: AAA
Contrast with black, large text2.51:1WCAG large text: Fail

Named colours

Slate blue · ΔE 12.8Rebecca purple · ΔE 15.4Royal blue · ΔE 17.4Dark slateblue · ΔE 17.9Midnight blue · ΔE 19.4Medium slateblue · ΔE 22
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 12.83, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#ACA63A
Analogous#3A79AC, #6D3AAC
Triadic#AC3A40, #40AC3A
Split complementary#AC6D3A, #79AC3A
Tetradic#AC3A79, #ACA63A, #3AAC6D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C6C8EC
Lighter +30%#A0A3DF
Lighter +20%#7A7FD2
Lighter +10%#545AC5
Darker −10%#2D3286
Darker −20%#202460
Darker −30%#13153A
Darker −40%#070713
More saturated +25%#1D26C9
Less saturated −25%#575A8F

Channel breakdown

R58
G64
B172
Red58 (22.7%)
Green64 (25.1%)
Blue172 (67.5%)
Hue236.84°
Saturation (HSL)49.57%
Lightness45.1%
Dominant channelBlue
Hex per channelR 3A · G 40 · B AC

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Every value on this page was computed from “3a40ac” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.