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Recognised as Colour

#645F9F

  • #645F9F
  • Blue
  • Dark
  • Nearest: Dark slateblue

#645F9F is a blue with RGB values 100, 95, 159 and HSL 245°, 25%, 50%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#645F9F#645F9F
HEX#645F9F
RGBrgb(100, 95, 159)
RGB (0–1)0.3922, 0.3725, 0.6235
RGB percentages39.2%, 37.3%, 62.4%
HSLhsl(244.7, 25.2%, 49.8%)
HSV / HSBhsv(244.7, 40.3%, 62.4%)
CMYK37.1%, 40.3%, 0%, 37.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,578,079
CSS custom property--colour: #645F9F;

Brightness & contrast

Relative luminance0.13397WCAG 2.x, 0 is black and 1 is white
Perceived brightness105.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.71:1
Contrast with white5.71:1WCAG normal text: AA
Contrast with black3.68:1WCAG normal text: Fail
Greyscale equivalent#656565
Inverted#9BA060

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4A68A1no red cones; affects about 1% of men; ΔE 11.8 from the original
Deuteranopia#49659Dno green cones; the most common form, about 1% of men; ΔE 11.5 from the original
Tritanopia#546B77no blue cones; rare, and affects men and women equally; ΔE 34 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.71:1WCAG large text: AAA
Contrast with black, large text3.68:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 16.9Steel blue · ΔE 23.9Cornflower blue · ΔE 25.5Medium purple · ΔE 27.3Slate blue · ΔE 29.9Rebecca purple · ΔE 30
Nearest named CSS colourDark slateblue (#483D8B)ΔE 16.93, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9A9F5F
Analogous#5F7A9F, #845F9F
Triadic#9F645F, #5F9F64
Split complementary#9F845F, #7A9F5F
Tetradic#9F5F7A, #9A9F5F, #5F9F84

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DFDEEC
Lighter +30%#C1BFD8
Lighter +20%#A29FC5
Lighter +10%#837FB2
Darker −10%#504C7F
Darker −20%#3C395F
Darker −30%#28263F
Darker −40%#14131F
More saturated +25%#493FBF
Less saturated −25%#7F7F7F

Channel breakdown

R100
G95
B159
Red100 (39.2%)
Green95 (37.3%)
Blue159 (62.4%)
Hue244.69°
Saturation (HSL)25.2%
Lightness49.8%
Dominant channelBlue
Hex per channelR 64 · G 5F · B 9F

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Every value on this page was computed from “645f9f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.