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Recognised as Colour

#2A4577

  • #2A4577
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2A4577 is a blue with RGB values 42, 69, 119 and HSL 219°, 48%, 32%. It is a dark colour, so white text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2A4577#2A4577
HEX#2A4577
RGBrgb(42, 69, 119)
RGB (0–1)0.1647, 0.2706, 0.4667
RGB percentages16.5%, 27.1%, 46.7%
HSLhsl(219, 47.8%, 31.6%)
HSV / HSBhsv(219, 64.7%, 46.7%)
CMYK64.7%, 42%, 0%, 53.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,770,295
CSS custom property--colour: #2A4577;

Brightness & contrast

Relative luminance0.0608WCAG 2.x, 0 is black and 1 is white
Perceived brightness70.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.48:1
Contrast with white9.48:1WCAG normal text: AAA
Contrast with black2.22:1WCAG normal text: Fail
Greyscale equivalent#434343
Inverted#D5BA88

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2F4A79no red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#244276no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#005058no blue cones; rare, and affects men and women equally; ΔE 32.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.48:1WCAG large text: AAA
Contrast with black, large text2.22:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 21.8Steel blue · ΔE 25.4Slate grey · ΔE 32.7Midnight blue · ΔE 33.5Dark slate grey · ΔE 33.7Light slate grey · ΔE 34.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 21.79, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#775C2A
Analogous#2A6B77, #362A77
Triadic#772A45, #45772A
Split complementary#77362A, #6B772A
Tetradic#772A6B, #775C2A, #2A7736

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#94ACD9
Lighter +30%#6E8FCC
Lighter +20%#4872BF
Lighter +10%#375B9D
Darker −10%#1D2F51
Darker −20%#0F192C
Darker −30%#020306
Darker −40%#000000
More saturated +25%#163F8B
Less saturated −25%#3E4B63

Channel breakdown

R42
G69
B119
Red42 (16.5%)
Green69 (27.1%)
Blue119 (46.7%)
Hue218.96°
Saturation (HSL)47.83%
Lightness31.57%
Dominant channelBlue
Hex per channelR 2A · G 45 · B 77

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Every value on this page was computed from “2a4577” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.