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Colour

#2A66A3

  • #2A66A3
  • Blue
  • Dark
  • Nearest: Steel blue

#2A66A3 is a blue with RGB values 42, 102, 163 and HSL 210°, 59%, 40%. It is a dark colour, so white text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#2A66A3#2A66A3
HEX#2A66A3
RGBrgb(42, 102, 163)
RGB (0–1)0.1647, 0.4, 0.6392
RGB percentages16.5%, 40%, 63.9%
HSLhsl(210.2, 59%, 40.2%)
HSV / HSBhsv(210.2, 74.2%, 63.9%)
CMYK74.2%, 37.4%, 0%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,778,787
CSS custom property--colour: #2A66A3;

Brightness & contrast

Relative luminance0.12639WCAG 2.x, 0 is black and 1 is white
Perceived brightness98.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.95:1
Contrast with white5.95:1WCAG normal text: AA
Contrast with black3.53:1WCAG normal text: Fail
Greyscale equivalent#5E5E5E
Inverted#D5995C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4A6AA6no red cones; affects about 1% of men; ΔE 5.9 from the original
Deuteranopia#385FA2no green cones; the most common form, about 1% of men; ΔE 6.8 from the original
Tritanopia#00747Cno blue cones; rare, and affects men and women equally; ΔE 37.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.95:1WCAG large text: AAA
Contrast with black, large text3.53:1WCAG large text: AA

Named colours

Steel blue · ΔE 13.5Cornflower blue · ΔE 23.6Dark slateblue · ΔE 26.8Slate grey · ΔE 30.2Light slate grey · ΔE 30.9Dodgerblue · ΔE 31.3
Nearest named CSS colourSteel blue (#4682B4)ΔE 13.52, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A3672A
Analogous#2AA3A3, #2A2AA3
Triadic#A32A66, #66A32A
Split complementary#A32A2A, #A3A32A
Tetradic#A32AA3, #A3672A, #2AA32A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AFCCEA
Lighter +30%#86B3E0
Lighter +20%#5E99D5
Lighter +10%#357FCB
Darker −10%#204D7A
Darker −20%#153352
Darker −30%#0B1A29
Darker −40%#000001
More saturated +25%#1066BD
Less saturated −25%#446689

Channel breakdown

R42
G102
B163
Red42 (16.5%)
Green102 (40%)
Blue163 (63.9%)
Hue210.25°
Saturation (HSL)59.02%
Lightness40.2%
Dominant channelBlue
Hex per channelR 2A · G 66 · B A3

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Every value on this page was computed from “2a66a3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.