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Recognised as Colour

#645FAD

  • #645FAD
  • Blue
  • Dark
  • Nearest: Dark slateblue

#645FAD is a blue with RGB values 100, 95, 173 and HSL 244°, 32%, 53%. It is a dark colour, so white text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#645FAD#645FAD
HEX#645FAD
RGBrgb(100, 95, 173)
RGB (0–1)0.3922, 0.3725, 0.6784
RGB percentages39.2%, 37.3%, 67.8%
HSLhsl(243.8, 32.2%, 52.5%)
HSV / HSBhsv(243.8, 45.1%, 67.8%)
CMYK42.2%, 45.1%, 0%, 32.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,578,093
CSS custom property--colour: #645FAD;

Brightness & contrast

Relative luminance0.13911WCAG 2.x, 0 is black and 1 is white
Perceived brightness108.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.55:1
Contrast with white5.55:1WCAG normal text: AA
Contrast with black3.78:1WCAG normal text: Fail
Greyscale equivalent#666666
Inverted#9BA052

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#426BB0no red cones; affects about 1% of men; ΔE 14.4 from the original
Deuteranopia#3F66ABno green cones; the most common form, about 1% of men; ΔE 13.5 from the original
Tritanopia#4E6F7Dno blue cones; rare, and affects men and women equally; ΔE 42.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.55:1WCAG large text: AAA
Contrast with black, large text3.78:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 13.9Medium purple · ΔE 20.4Slate blue · ΔE 21.8Cornflower blue · ΔE 23.3Rebecca purple · ΔE 24.4Royal blue · ΔE 24.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.9, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A8AD5F
Analogous#5F81AD, #8B5FAD
Triadic#AD645F, #5FAD64
Split complementary#AD8B5F, #81AD5F
Tetradic#AD5F81, #A8AD5F, #5FAD8B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E7E6F2
Lighter +30%#C6C4E1
Lighter +20%#A5A2D0
Lighter +10%#8581BE
Darker −10%#4E4A8F
Darker −20%#3C386E
Darker −30%#29274C
Darker −40%#17162A
More saturated +25%#4A41CB
Less saturated −25%#7E7D8F

Channel breakdown

R100
G95
B173
Red100 (39.2%)
Green95 (37.3%)
Blue173 (67.8%)
Hue243.85°
Saturation (HSL)32.23%
Lightness52.55%
Dominant channelBlue
Hex per channelR 64 · G 5F · B AD

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Every value on this page was computed from “645fad” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.