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Recognised as Colour

#3397FF

  • #3397FF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#3397FF is a blue with RGB values 51, 151, 255 and HSL 211°, 100%, 60%. It is a dark colour, so black text on it reaches 7:1 contrast (AAA for normal text). The nearest named colour is Dodgerblue.

Colour values

#3397FF#3397FF
HEX#3397FF
RGBrgb(51, 151, 255)
RGB (0–1)0.2, 0.5922, 1
RGB percentages20%, 59.2%, 100%
HSLhsl(210.6, 100%, 60%)
HSV / HSBhsv(210.6, 80%, 100%)
CMYK80%, 40.8%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,381,247
CSS custom property--colour: #3397FF;

Brightness & contrast

Relative luminance0.30057WCAG 2.x, 0 is black and 1 is white
Perceived brightness146.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.01:1
Contrast with white3:1WCAG normal text: Fail
Contrast with black7.01:1WCAG normal text: AAA
Greyscale equivalent#898989
Inverted#CC6800

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#639FFFno red cones; affects about 1% of men; ΔE 7.4 from the original
Deuteranopia#408DFDno green cones; the most common form, about 1% of men; ΔE 7.7 from the original
Tritanopia#00B0BFno blue cones; rare, and affects men and women equally; ΔE 57 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3:1WCAG large text: Fail
Contrast with black, large text7.01:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 5.1Cornflower blue · ΔE 10.5Royal blue · ΔE 24.2Steel blue · ΔE 31.1Medium purple · ΔE 31.7Deep skyblue · ΔE 32.1
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 5.14, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF9B33
Analogous#33FDFF, #3533FF
Triadic#FF3397, #97FF33
Split complementary#FF3533, #FDFF33
Tetradic#FF33FD, #FF9B33, #33FF35

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#CCE5FF
Lighter +20%#99CBFF
Lighter +10%#66B1FF
Darker −10%#007DFF
Darker −20%#0064CC
Darker −30%#004B99
Darker −40%#003266
More saturated +25%#3397FF
Less saturated −25%#4C97E6

Channel breakdown

R51
G151
B255
Red51 (20%)
Green151 (59.2%)
Blue255 (100%)
Hue210.59°
Saturation (HSL)100%
Lightness60%
Dominant channelBlue
Hex per channelR 33 · G 97 · B FF

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Every value on this page was computed from “3397ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.