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Recognised as Colour

#3683AB

  • #3683AB
  • Blue
  • Dark
  • Nearest: Steel blue

#3683AB is a blue with RGB values 54, 131, 171 and HSL 201°, 52%, 44%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#3683AB#3683AB
HEX#3683AB
RGBrgb(54, 131, 171)
RGB (0–1)0.2118, 0.5137, 0.6706
RGB percentages21.2%, 51.4%, 67.1%
HSLhsl(200.5, 52%, 44.1%)
HSV / HSBhsv(200.5, 68.4%, 67.1%)
CMYK68.4%, 23.4%, 0%, 32.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,572,651
CSS custom property--colour: #3683AB;

Brightness & contrast

Relative luminance0.19957WCAG 2.x, 0 is black and 1 is white
Perceived brightness119.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.99:1
Contrast with white4.21:1WCAG normal text: Fail
Contrast with black4.99:1WCAG normal text: AA
Greyscale equivalent#767676
Inverted#C97C54

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7082ADno red cones; affects about 1% of men; ΔE 15.3 from the original
Deuteranopia#6076AAno green cones; the most common form, about 1% of men; ΔE 16.8 from the original
Tritanopia#008E90no blue cones; rare, and affects men and women equally; ΔE 26.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.21:1WCAG large text: AA
Contrast with black, large text4.99:1WCAG large text: AAA

Named colours

Steel blue · ΔE 7.7Light slate grey · ΔE 19.4Slate grey · ΔE 19.5Cadetblue · ΔE 24.5Deep skyblue · ΔE 26.3Teal · ΔE 27.1
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.68, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AB5E36
Analogous#36AB99, #3648AB
Triadic#AB3683, #83AB36
Split complementary#AB3648, #AB9936
Tetradic#9936AB, #AB5E36, #48AB36

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C1DDEC
Lighter +30%#9BC8DF
Lighter +20%#74B3D3
Lighter +10%#4D9DC7
Darker −10%#2A6584
Darker −20%#1E485D
Darker −30%#112A37
Darker −40%#050C10
More saturated +25%#1A8CC7
Less saturated −25%#527A8F

Channel breakdown

R54
G131
B171
Red54 (21.2%)
Green131 (51.4%)
Blue171 (67.1%)
Hue200.51°
Saturation (HSL)52%
Lightness44.12%
Dominant channelBlue
Hex per channelR 36 · G 83 · B AB

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Every value on this page was computed from “3683ab” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.