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Recognised as Colour

#665D97

  • #665D97
  • Blue
  • Dark
  • Nearest: Dark slateblue

#665D97 is a blue with RGB values 102, 93, 151 and HSL 249°, 24%, 48%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#665D97#665D97
HEX#665D97
RGBrgb(102, 93, 151)
RGB (0–1)0.4, 0.3647, 0.5922
RGB percentages40%, 36.5%, 59.2%
HSLhsl(249.3, 23.8%, 47.8%)
HSV / HSBhsv(249.3, 38.4%, 59.2%)
CMYK32.5%, 38.4%, 0%, 40.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,708,631
CSS custom property--colour: #665D97;

Brightness & contrast

Relative luminance0.12888WCAG 2.x, 0 is black and 1 is white
Perceived brightness103.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.87:1
Contrast with white5.87:1WCAG normal text: AA
Contrast with black3.58:1WCAG normal text: Fail
Greyscale equivalent#636363
Inverted#99A268

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4C6699no red cones; affects about 1% of men; ΔE 12.3 from the original
Deuteranopia#4C6396no green cones; the most common form, about 1% of men; ΔE 11.3 from the original
Tritanopia#5A6873no blue cones; rare, and affects men and women equally; ΔE 30.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.87:1WCAG large text: AAA
Contrast with black, large text3.58:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 18.6Steel blue · ΔE 23.8Cornflower blue · ΔE 28.2Slate grey · ΔE 29.8Medium purple · ΔE 30.1Light slate grey · ΔE 30.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 18.58, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8E975D
Analogous#5D7197, #835D97
Triadic#97665D, #5D9766
Split complementary#97835D, #71975D
Tetradic#975D71, #8E975D, #5D9783

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DBD9E7
Lighter +30%#BDB9D4
Lighter +20%#A09AC0
Lighter +10%#827AAD
Darker −10%#514A77
Darker −20%#3B3658
Darker −30%#262338
Darker −40%#110F19
More saturated +25%#513EB5
Less saturated −25%#7A7A7A

Channel breakdown

R102
G93
B151
Red102 (40%)
Green93 (36.5%)
Blue151 (59.2%)
Hue249.31°
Saturation (HSL)23.77%
Lightness47.84%
Dominant channelBlue
Hex per channelR 66 · G 5D · B 97

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Every value on this page was computed from “665d97” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.