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Colour

#3D81E1

  • #3D81E1
  • Blue
  • Dark
  • Nearest: Cornflower blue

#3D81E1 is a blue with RGB values 61, 129, 225 and HSL 215°, 73%, 56%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#3D81E1#3D81E1
HEX#3D81E1
RGBrgb(61, 129, 225)
RGB (0–1)0.2392, 0.5059, 0.8824
RGB percentages23.9%, 50.6%, 88.2%
HSLhsl(215.1, 73.2%, 56.1%)
HSV / HSBhsv(215.1, 72.9%, 88.2%)
CMYK72.9%, 42.7%, 0%, 11.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,030,945
CSS custom property--colour: #3D81E1;

Brightness & contrast

Relative luminance0.22129WCAG 2.x, 0 is black and 1 is white
Perceived brightness129 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.43:1
Contrast with white3.87:1WCAG normal text: Fail
Contrast with black5.43:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#C27E1E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#528AE5no red cones; affects about 1% of men; ΔE 5 from the original
Deuteranopia#347BDFno green cones; the most common form, about 1% of men; ΔE 3.6 from the original
Tritanopia#0098A6no blue cones; rare, and affects men and women equally; ΔE 54.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.87:1WCAG large text: AA
Contrast with black, large text5.43:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 9.8Dodgerblue · ΔE 9.8Royal blue · ΔE 19.6Medium purple · ΔE 26.5Slate blue · ΔE 26.9Steel blue · ΔE 27.3
Nearest named CSS colourCornflower blue (#6495ED)ΔE 9.79, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E19D3D
Analogous#3DD3E1, #4B3DE1
Triadic#E13D81, #81E13D
Split complementary#E14B3D, #D3E13D
Tetradic#E13DD3, #E19D3D, #3DE14B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EEF4FC
Lighter +30%#C2D7F5
Lighter +20%#95BAEF
Lighter +10%#699EE8
Darker −10%#1F67CC
Darker −20%#19519F
Darker −30%#123A73
Darker −40%#0B2447
More saturated +25%#217CFD
Less saturated −25%#5986C5

Channel breakdown

R61
G129
B225
Red61 (23.9%)
Green129 (50.6%)
Blue225 (88.2%)
Hue215.12°
Saturation (HSL)73.21%
Lightness56.08%
Dominant channelBlue
Hex per channelR 3D · G 81 · B E1

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Every value on this page was computed from “3d81e1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.