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Recognised as Colour

#645BC2

  • #645BC2
  • Blue
  • Dark
  • Nearest: Slate blue

#645BC2 is a blue with RGB values 100, 91, 194 and HSL 245°, 46%, 56%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#645BC2#645BC2
HEX#645BC2
RGBrgb(100, 91, 194)
RGB (0–1)0.3922, 0.3569, 0.7608
RGB percentages39.2%, 35.7%, 76.1%
HSLhsl(245.2, 45.8%, 55.9%)
HSV / HSBhsv(245.2, 53.1%, 76.1%)
CMYK48.5%, 53.1%, 0%, 23.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,577,090
CSS custom property--colour: #645BC2;

Brightness & contrast

Relative luminance0.14087WCAG 2.x, 0 is black and 1 is white
Perceived brightness110.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.5:1
Contrast with white5.5:1WCAG normal text: AA
Contrast with black3.82:1WCAG normal text: Fail
Greyscale equivalent#646464
Inverted#9BA43D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#266CC6no red cones; affects about 1% of men; ΔE 19.7 from the original
Deuteranopia#1F66C0no green cones; the most common form, about 1% of men; ΔE 18.8 from the original
Tritanopia#437286no blue cones; rare, and affects men and women equally; ΔE 55.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.5:1WCAG large text: AAA
Contrast with black, large text3.82:1WCAG large text: AA

Named colours

Slate blue · ΔE 7.1Medium purple · ΔE 12.5Royal blue · ΔE 13.5Rebecca purple · ΔE 17.6Medium slateblue · ΔE 17.9Dark slateblue · ΔE 18
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 7.12, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B9C25B
Analogous#5B85C2, #985BC2
Triadic#C2645B, #5BC264
Split complementary#C2985B, #85C25B
Tetradic#C25B85, #B9C25B, #5BC298

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F1F0F9
Lighter +30%#CDCBEB
Lighter +20%#AAA5DE
Lighter +10%#8780D0
Darker −10%#493FAB
Darker −20%#393285
Darker −30%#292460
Darker −40%#19163B
More saturated +25%#4D3FDE
Less saturated −25%#7B77A6

Channel breakdown

R100
G91
B194
Red100 (39.2%)
Green91 (35.7%)
Blue194 (76.1%)
Hue245.24°
Saturation (HSL)45.78%
Lightness55.88%
Dominant channelBlue
Hex per channelR 64 · G 5B · B C2

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Every value on this page was computed from “645bc2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.