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Recognised as Colour

#2A518D

  • #2A518D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2A518D is a blue with RGB values 42, 81, 141 and HSL 216°, 54%, 36%. It is a dark colour, so white text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2A518D#2A518D
HEX#2A518D
RGBrgb(42, 81, 141)
RGB (0–1)0.1647, 0.3176, 0.5529
RGB percentages16.5%, 31.8%, 55.3%
HSLhsl(216.4, 54.1%, 35.9%)
HSV / HSBhsv(216.4, 70.2%, 55.3%)
CMYK70.2%, 42.6%, 0%, 44.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,773,389
CSS custom property--colour: #2A518D;

Brightness & contrast

Relative luminance0.083WCAG 2.x, 0 is black and 1 is white
Perceived brightness81.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.89:1
Contrast with white7.89:1WCAG normal text: AAA
Contrast with black2.66:1WCAG normal text: Fail
Greyscale equivalent#4D4D4D
Inverted#D5AE72

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#35568Fno red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#254D8Cno green cones; the most common form, about 1% of men; ΔE 2.7 from the original
Tritanopia#005F68no blue cones; rare, and affects men and women equally; ΔE 37.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.89:1WCAG large text: AAA
Contrast with black, large text2.66:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 19.7Steel blue · ΔE 21.8Cornflower blue · ΔE 29.9Midnight blue · ΔE 33.1Slate grey · ΔE 33.8Light slate grey · ΔE 35.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 19.73, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8D662A
Analogous#2A828D, #352A8D
Triadic#8D2A51, #518D2A
Split complementary#8D352A, #838D2A
Tetradic#8D2A82, #8D662A, #2A8D35

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A0BAE3
Lighter +30%#799ED7
Lighter +20%#5282CB
Lighter +10%#3668B4
Darker −10%#1E3A66
Darker −20%#13243E
Darker −30%#070D17
Darker −40%#000000
More saturated +25%#134CA4
Less saturated −25%#415676

Channel breakdown

R42
G81
B141
Red42 (16.5%)
Green81 (31.8%)
Blue141 (55.3%)
Hue216.36°
Saturation (HSL)54.1%
Lightness35.88%
Dominant channelBlue
Hex per channelR 2A · G 51 · B 8D

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Every value on this page was computed from “2a518d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.