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Recognised as Colour

#42366D

  • #42366D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#42366D is a blue with RGB values 66, 54, 109 and HSL 253°, 34%, 32%. It is a dark colour, so white text on it reaches 10.6:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#42366D#42366D
HEX#42366D
RGBrgb(66, 54, 109)
RGB (0–1)0.2588, 0.2118, 0.4275
RGB percentages25.9%, 21.2%, 42.7%
HSLhsl(253.1, 33.7%, 32%)
HSV / HSBhsv(253.1, 50.5%, 42.7%)
CMYK39.4%, 50.5%, 0%, 57.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,339,309
CSS custom property--colour: #42366D;

Brightness & contrast

Relative luminance0.04901WCAG 2.x, 0 is black and 1 is white
Perceived brightness66.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.61:1
Contrast with white10.61:1WCAG normal text: AAA
Contrast with black1.98:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#BDC992

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#223F6Fno red cones; affects about 1% of men; ΔE 13.3 from the original
Deuteranopia#233D6Cno green cones; the most common form, about 1% of men; ΔE 12.9 from the original
Tritanopia#37414Cno blue cones; rare, and affects men and women equally; ΔE 30.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.61:1WCAG large text: AAA
Contrast with black, large text1.98:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 14.1Midnight blue · ΔE 25.1Rebecca purple · ΔE 29.4Steel blue · ΔE 35.3Slate blue · ΔE 37.2Medium purple · ΔE 38.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14.12, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#616D36
Analogous#36456D, #5E366D
Triadic#6D4236, #366D42
Split complementary#6D5E36, #456D36
Tetradic#6D3645, #616D36, #366D5E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AA9FD0
Lighter +30%#8C7DBF
Lighter +20%#6D5BAE
Lighter +10%#57478F
Darker −10%#2D254B
Darker −20%#191429
Darker −30%#040307
Darker −40%#000000
More saturated +25%#372281
Less saturated −25%#4D4A59

Channel breakdown

R66
G54
B109
Red66 (25.9%)
Green54 (21.2%)
Blue109 (42.7%)
Hue253.09°
Saturation (HSL)33.74%
Lightness31.96%
Dominant channelBlue
Hex per channelR 42 · G 36 · B 6D

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Every value on this page was computed from “42366d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.