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Recognised as Colour

#3173AB

  • #3173AB
  • Blue
  • Dark
  • Nearest: Steel blue

#3173AB is a blue with RGB values 49, 115, 171 and HSL 208°, 55%, 43%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#3173AB#3173AB
HEX#3173AB
RGBrgb(49, 115, 171)
RGB (0–1)0.1922, 0.451, 0.6706
RGB percentages19.2%, 45.1%, 67.1%
HSLhsl(207.5, 55.5%, 43.1%)
HSV / HSBhsv(207.5, 71.3%, 67.1%)
CMYK71.3%, 32.7%, 0%, 32.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,240,875
CSS custom property--colour: #3173AB;

Brightness & contrast

Relative luminance0.15855WCAG 2.x, 0 is black and 1 is white
Perceived brightness108.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.03:1
Contrast with white5.03:1WCAG normal text: AA
Contrast with black4.17:1WCAG normal text: Fail
Greyscale equivalent#696969
Inverted#CE8C54

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5A75ADno red cones; affects about 1% of men; ΔE 8.8 from the original
Deuteranopia#496AAAno green cones; the most common form, about 1% of men; ΔE 10 from the original
Tritanopia#008087no blue cones; rare, and affects men and women equally; ΔE 34.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.03:1WCAG large text: AAA
Contrast with black, large text4.17:1WCAG large text: AA

Named colours

Steel blue · ΔE 7.1Cornflower blue · ΔE 23.1Slate grey · ΔE 26.1Light slate grey · ΔE 26.5Deep skyblue · ΔE 30.9Dodgerblue · ΔE 32.5
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.14, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AB6931
Analogous#31ABA6, #3136AB
Triadic#AB3173, #73AB31
Split complementary#AB3136, #ABA631
Tetradic#A631AB, #AB6931, #36AB31

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BCD6EC
Lighter +30%#95BEE0
Lighter +20%#6DA5D5
Lighter +10%#458DCA
Darker −10%#265883
Darker −20%#1A3E5C
Darker −30%#0F2334
Darker −40%#04080C
More saturated +25%#1575C6
Less saturated −25%#4D7190

Channel breakdown

R49
G115
B171
Red49 (19.2%)
Green115 (45.1%)
Blue171 (67.1%)
Hue207.54°
Saturation (HSL)55.45%
Lightness43.14%
Dominant channelBlue
Hex per channelR 31 · G 73 · B AB

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Every value on this page was computed from “3173ab” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.