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Colour

#6661FF

  • #6661FF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#6661FF is a blue with RGB values 102, 97, 255 and HSL 242°, 100%, 69%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#6661FF#6661FF
HEX#6661FF
RGBrgb(102, 97, 255)
RGB (0–1)0.4, 0.3804, 1
RGB percentages40%, 38%, 100%
HSLhsl(241.9, 100%, 69%)
HSV / HSBhsv(241.9, 62%, 100%)
CMYK60%, 62%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,709,759
CSS custom property--colour: #6661FF;

Brightness & contrast

Relative luminance0.18594WCAG 2.x, 0 is black and 1 is white
Perceived brightness126.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.72:1
Contrast with white4.45:1WCAG normal text: Fail
Contrast with black4.72:1WCAG normal text: AA
Greyscale equivalent#6D6D6D
Inverted#999E00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#007EFFno red cones; affects about 1% of men; ΔE 27.5 from the original
Deuteranopia#0071FCno green cones; the most common form, about 1% of men; ΔE 19.6 from the original
Tritanopia#0089A7no blue cones; rare, and affects men and women equally; ΔE 85.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.45:1WCAG large text: AA
Contrast with black, large text4.72:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 14Slate blue · ΔE 23.4Royal blue · ΔE 24.1Blue violet · ΔE 24.9Dark orchid · ΔE 26.8Medium purple · ΔE 30
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 13.96, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FAFF61
Analogous#61ABFF, #B561FF
Triadic#FF6661, #61FF66
Split complementary#FFB561, #ABFF61
Tetradic#FF61AB, #FAFF61, #61FFB5

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FAFAFF
Lighter +20%#C9C7FF
Lighter +10%#9794FF
Darker −10%#352EFF
Darker −20%#0800FA
Darker −30%#0600C7
Darker −40%#050094
More saturated +25%#6661FF
Less saturated −25%#7875EB

Channel breakdown

R102
G97
B255
Red102 (40%)
Green97 (38%)
Blue255 (100%)
Hue241.9°
Saturation (HSL)100%
Lightness69.02%
Dominant channelBlue
Hex per channelR 66 · G 61 · B FF

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Every value on this page was computed from “6661ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.