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Colour

#3399FF

  • #3399FF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#3399FF is a blue with RGB values 51, 153, 255 and HSL 210°, 100%, 60%. It is a dark colour, so black text on it reaches 7.1:1 contrast (AAA for normal text). The nearest named colour is Dodgerblue.

Colour values

#3399FF#3399FF
HEX#3399FF
HEX (short)#39F
RGBrgb(51, 153, 255)
RGB (0–1)0.2, 0.6, 1
RGB percentages20%, 60%, 100%
HSLhsl(210, 100%, 60%)
HSV / HSBhsv(210, 80%, 100%)
CMYK80%, 40%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,381,759
CSS custom property--colour: #3399FF;

Brightness & contrast

Relative luminance0.30706WCAG 2.x, 0 is black and 1 is white
Perceived brightness148.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.14:1
Contrast with white2.94:1WCAG normal text: Fail
Contrast with black7.14:1WCAG normal text: AAA
Greyscale equivalent#8B8B8B
Inverted#CC6600

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#67A0FFno red cones; affects about 1% of men; ΔE 7.7 from the original
Deuteranopia#448EFDno green cones; the most common form, about 1% of men; ΔE 8.7 from the original
Tritanopia#00B1C0no blue cones; rare, and affects men and women equally; ΔE 55.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.94:1WCAG large text: Fail
Contrast with black, large text7.14:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 6.7Cornflower blue · ΔE 10Royal blue · ΔE 25.6Steel blue · ΔE 30.1Deep skyblue · ΔE 30.6Medium purple · ΔE 32.7
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 6.66, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF9933
Analogous#33FFFF, #3333FF
Triadic#FF3399, #99FF33
Split complementary#FF3333, #FFFF33
Tetradic#FF33FF, #FF9933, #33FF33

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#CCE6FF
Lighter +20%#99CCFF
Lighter +10%#66B3FF
Darker −10%#0080FF
Darker −20%#0066CC
Darker −30%#004D99
Darker −40%#003366
More saturated +25%#3399FF
Less saturated −25%#4C99E6

Channel breakdown

R51
G153
B255
Red51 (20%)
Green153 (60%)
Blue255 (100%)
Hue210°
Saturation (HSL)100%
Lightness60%
Dominant channelBlue
Hex per channelR 33 · G 99 · B FF

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Every value on this page was computed from “3399ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.