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Recognised as Colour

#423D91

  • #423D91
  • Blue
  • Dark
  • Nearest: Dark slateblue

#423D91 is a blue with RGB values 66, 61, 145 and HSL 244°, 41%, 40%. It is a dark colour, so white text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#423D91#423D91
HEX#423D91
RGBrgb(66, 61, 145)
RGB (0–1)0.2588, 0.2392, 0.5686
RGB percentages25.9%, 23.9%, 56.9%
HSLhsl(243.6, 40.8%, 40.4%)
HSV / HSBhsv(243.6, 57.9%, 56.9%)
CMYK54.5%, 57.9%, 0%, 43.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,341,137
CSS custom property--colour: #423D91;

Brightness & contrast

Relative luminance0.0654WCAG 2.x, 0 is black and 1 is white
Perceived brightness76.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.1:1
Contrast with white9.1:1WCAG normal text: AAA
Contrast with black2.31:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#BDC26E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004B94no red cones; affects about 1% of men; ΔE 16.6 from the original
Deuteranopia#00458Fno green cones; the most common form, about 1% of men; ΔE 14.6 from the original
Tritanopia#205061no blue cones; rare, and affects men and women equally; ΔE 48.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.1:1WCAG large text: AAA
Contrast with black, large text2.31:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 3.9Midnight blue · ΔE 16.1Rebecca purple · ΔE 16.4Slate blue · ΔE 21Royal blue · ΔE 25.8Medium purple · ΔE 26.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 3.92, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8C913D
Analogous#3D6291, #6C3D91
Triadic#91423D, #3D9142
Split complementary#916C3D, #62913D
Tetradic#913D62, #8C913D, #3D916C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BBB9E1
Lighter +30%#9895D2
Lighter +20%#7671C3
Lighter +10%#534DB4
Darker −10%#322E6D
Darker −20%#211F49
Darker −30%#111025
Darker −40%#010101
More saturated +25%#2B23AB
Less saturated −25%#595777

Channel breakdown

R66
G61
B145
Red66 (25.9%)
Green61 (23.9%)
Blue145 (56.9%)
Hue243.57°
Saturation (HSL)40.78%
Lightness40.39%
Dominant channelBlue
Hex per channelR 42 · G 3D · B 91

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Every value on this page was computed from “423d91” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.