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Recognised as Colour

#2A3DB1

  • #2A3DB1
  • Blue
  • Dark
  • Nearest: Slate blue

#2A3DB1 is a blue with RGB values 42, 61, 177 and HSL 232°, 62%, 43%. It is a dark colour, so white text on it reaches 8.7:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#2A3DB1#2A3DB1
HEX#2A3DB1
RGBrgb(42, 61, 177)
RGB (0–1)0.1647, 0.2392, 0.6941
RGB percentages16.5%, 23.9%, 69.4%
HSLhsl(231.6, 61.6%, 42.9%)
HSV / HSBhsv(231.6, 76.3%, 69.4%)
CMYK76.3%, 65.5%, 0%, 30.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,768,305
CSS custom property--colour: #2A3DB1;

Brightness & contrast

Relative luminance0.07004WCAG 2.x, 0 is black and 1 is white
Perceived brightness79.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.75:1
Contrast with white8.75:1WCAG normal text: AAA
Contrast with black2.4:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#D5C24E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0051B5no red cones; affects about 1% of men; ΔE 16 from the original
Deuteranopia#0045AFno green cones; the most common form, about 1% of men; ΔE 9.1 from the original
Tritanopia#005C71no blue cones; rare, and affects men and women equally; ΔE 67 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.75:1WCAG large text: AAA
Contrast with black, large text2.4:1WCAG large text: Fail

Named colours

Slate blue · ΔE 14.8Royal blue · ΔE 18Rebecca purple · ΔE 18.6Midnight blue · ΔE 21.4Medium slateblue · ΔE 21.5Dark slateblue · ΔE 23
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 14.83, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B19E2A
Analogous#2A81B1, #5A2AB1
Triadic#B12A3D, #3DB12A
Split complementary#B15A2A, #81B12A
Tetradic#B12A81, #B19E2A, #2AB15A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B9C0EE
Lighter +30%#8F9BE5
Lighter +20%#6677DB
Lighter +10%#3D52D1
Darker −10%#202F88
Darker −20%#16215F
Darker −30%#0D1235
Darker −40%#03040C
More saturated +25%#0F29CC
Less saturated −25%#455196

Channel breakdown

R42
G61
B177
Red42 (16.5%)
Green61 (23.9%)
Blue177 (69.4%)
Hue231.56°
Saturation (HSL)61.64%
Lightness42.94%
Dominant channelBlue
Hex per channelR 2A · G 3D · B B1

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Every value on this page was computed from “2a3db1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.