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Colour

#3181A1

  • #3181A1
  • Cyan
  • Dark
  • Nearest: Steel blue

#3181A1 is a cyan with RGB values 49, 129, 161 and HSL 197°, 53%, 41%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#3181A1#3181A1
HEX#3181A1
RGBrgb(49, 129, 161)
RGB (0–1)0.1922, 0.5059, 0.6314
RGB percentages19.2%, 50.6%, 63.1%
HSLhsl(197.1, 53.3%, 41.2%)
HSV / HSBhsv(197.1, 69.6%, 63.1%)
CMYK69.6%, 19.9%, 0%, 36.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,244,449
CSS custom property--colour: #3181A1;

Brightness & contrast

Relative luminance0.18927WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.79:1
Contrast with white4.39:1WCAG normal text: Fail
Contrast with black4.79:1WCAG normal text: AA
Greyscale equivalent#727272
Inverted#CE7E5E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#707FA3no red cones; affects about 1% of men; ΔE 17.4 from the original
Deuteranopia#6174A1no green cones; the most common form, about 1% of men; ΔE 18.6 from the original
Tritanopia#008A8Cno blue cones; rare, and affects men and women equally; ΔE 21.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.39:1WCAG large text: AA
Contrast with black, large text4.79:1WCAG large text: AAA

Named colours

Steel blue · ΔE 12.6Slate grey · ΔE 17.9Light slate grey · ΔE 18.1Cadetblue · ΔE 20.7Teal · ΔE 22Dark cyan · ΔE 22.8
Nearest named CSS colourSteel blue (#4682B4)ΔE 12.61, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A15131
Analogous#31A189, #3149A1
Triadic#A13181, #81A131
Split complementary#A13149, #A18931
Tetradic#8931A1, #A15131, #49A131

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B5DAE9
Lighter +30%#8EC6DD
Lighter +20%#67B3D1
Lighter +10%#409FC5
Darker −10%#25627A
Darker −20%#194253
Darker −30%#0D232C
Darker −40%#010405
More saturated +25%#178CBB
Less saturated −25%#4B7687

Channel breakdown

R49
G129
B161
Red49 (19.2%)
Green129 (50.6%)
Blue161 (63.1%)
Hue197.14°
Saturation (HSL)53.33%
Lightness41.18%
Dominant channelBlue
Hex per channelR 31 · G 81 · B A1

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Every value on this page was computed from “3181a1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.