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Recognised as Colour

#3D66CA

  • #3D66CA
  • Blue
  • Dark
  • Nearest: Royal blue

#3D66CA is a blue with RGB values 61, 102, 202 and HSL 223°, 57%, 52%. It is a dark colour, so white text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#3D66CA#3D66CA
HEX#3D66CA
RGBrgb(61, 102, 202)
RGB (0–1)0.2392, 0.4, 0.7922
RGB percentages23.9%, 40%, 79.2%
HSLhsl(222.6, 57.1%, 51.6%)
HSV / HSBhsv(222.6, 69.8%, 79.2%)
CMYK69.8%, 49.5%, 0%, 20.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,024,010
CSS custom property--colour: #3D66CA;

Brightness & contrast

Relative luminance0.14759WCAG 2.x, 0 is black and 1 is white
Perceived brightness109 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.31:1
Contrast with white5.31:1WCAG normal text: AA
Contrast with black3.95:1WCAG normal text: Fail
Greyscale equivalent#656565
Inverted#C29935

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2D72CEno red cones; affects about 1% of men; ΔE 9.1 from the original
Deuteranopia#0065C8no green cones; the most common form, about 1% of men; ΔE 5.6 from the original
Tritanopia#007E8Eno blue cones; rare, and affects men and women equally; ΔE 57.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.31:1WCAG large text: AAA
Contrast with black, large text3.95:1WCAG large text: AA

Named colours

Royal blue · ΔE 11.7Slate blue · ΔE 16.8Dodgerblue · ΔE 18.3Cornflower blue · ΔE 20.6Medium purple · ΔE 20.9Dark slateblue · ΔE 21.3
Nearest named CSS colourRoyal blue (#4169E1)ΔE 11.66, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CAA13D
Analogous#3DADCA, #5A3DCA
Triadic#CA3D66, #66CA3D
Split complementary#CA5A3D, #ADCA3D
Tetradic#CA3DAD, #CAA13D, #3DCA5A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DDE4F6
Lighter +30%#B5C5EB
Lighter +20%#8DA5E0
Lighter +10%#6586D5
Darker −10%#2D51A7
Darker −20%#233D7E
Darker −30%#182A56
Darker −40%#0D162E
More saturated +25%#1E59E9
Less saturated −25%#5C73AB

Channel breakdown

R61
G102
B202
Red61 (23.9%)
Green102 (40%)
Blue202 (79.2%)
Hue222.55°
Saturation (HSL)57.09%
Lightness51.57%
Dominant channelBlue
Hex per channelR 3D · G 66 · B CA

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Every value on this page was computed from “3d66ca” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.