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Recognised as Colour

#2A66BB

  • #2A66BB
  • Blue
  • Dark
  • Nearest: Cornflower blue

#2A66BB is a blue with RGB values 42, 102, 187 and HSL 215°, 63%, 45%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#2A66BB#2A66BB
HEX#2A66BB
RGBrgb(42, 102, 187)
RGB (0–1)0.1647, 0.4, 0.7333
RGB percentages16.5%, 40%, 73.3%
HSLhsl(215.2, 63.3%, 44.9%)
HSV / HSBhsv(215.2, 77.5%, 73.3%)
CMYK77.5%, 45.5%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,778,811
CSS custom property--colour: #2A66BB;

Brightness & contrast

Relative luminance0.13583WCAG 2.x, 0 is black and 1 is white
Perceived brightness103.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.65:1
Contrast with white5.65:1WCAG normal text: AA
Contrast with black3.72:1WCAG normal text: Fail
Greyscale equivalent#5F5F5F
Inverted#D59944

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#396EBEno red cones; affects about 1% of men; ΔE 4.7 from the original
Deuteranopia#1961B9no green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#007A87no blue cones; rare, and affects men and women equally; ΔE 49.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.65:1WCAG large text: AAA
Contrast with black, large text3.72:1WCAG large text: AA

Named colours

Cornflower blue · ΔE 18.4Dodgerblue · ΔE 20.5Dark slateblue · ΔE 21.3Royal blue · ΔE 21.6Steel blue · ΔE 25.3Slate blue · ΔE 26
Nearest named CSS colourCornflower blue (#6495ED)ΔE 18.42, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BB7F2A
Analogous#2AAEBB, #372ABB
Triadic#BB2A66, #66BB2A
Split complementary#BB372A, #AEBB2A
Tetradic#BB2AAE, #BB7F2A, #2ABB37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C0D4F1
Lighter +30%#96B8E8
Lighter +20%#6D9CDE
Lighter +10%#437FD5
Darker −10%#214F91
Darker −20%#173968
Darker −30%#0E223E
Darker −40%#050B14
More saturated +25%#0D61D8
Less saturated −25%#476B9E

Channel breakdown

R42
G102
B187
Red42 (16.5%)
Green102 (40%)
Blue187 (73.3%)
Hue215.17°
Saturation (HSL)63.32%
Lightness44.9%
Dominant channelBlue
Hex per channelR 2A · G 66 · B BB

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Every value on this page was computed from “2a66bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.