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Recognised as Colour

#515ACD

  • #515ACD
  • Blue
  • Dark
  • Nearest: Slate blue

#515ACD is a blue with RGB values 81, 90, 205 and HSL 236°, 55%, 56%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#515ACD#515ACD
HEX#515ACD
RGBrgb(81, 90, 205)
RGB (0–1)0.3176, 0.3529, 0.8039
RGB percentages31.8%, 35.3%, 80.4%
HSLhsl(235.6, 55.4%, 56.1%)
HSV / HSBhsv(235.6, 60.5%, 80.4%)
CMYK60.5%, 56.1%, 0%, 19.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,331,661
CSS custom property--colour: #515ACD;

Brightness & contrast

Relative luminance0.13469WCAG 2.x, 0 is black and 1 is white
Perceived brightness107.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.69:1
Contrast with white5.69:1WCAG normal text: AA
Contrast with black3.69:1WCAG normal text: Fail
Greyscale equivalent#606060
Inverted#AEA532

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#006CD1no red cones; affects about 1% of men; ΔE 18.1 from the original
Deuteranopia#0061CBno green cones; the most common form, about 1% of men; ΔE 13.1 from the original
Tritanopia#00758Bno blue cones; rare, and affects men and women equally; ΔE 65.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.69:1WCAG large text: AAA
Contrast with black, large text3.69:1WCAG large text: AA

Named colours

Slate blue · ΔE 6.1Royal blue · ΔE 7.9Medium slateblue · ΔE 13.9Medium purple · ΔE 16.8Rebecca purple · ΔE 20.9Dark slateblue · ΔE 23.2
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 6.07, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CDC451
Analogous#5198CD, #8651CD
Triadic#CD515A, #5ACD51
Split complementary#CD8651, #98CD51
Tetradic#CD5198, #CDC451, #51CD86

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EFF0FB
Lighter +30%#C8CBEF
Lighter +20%#A0A5E4
Lighter +10%#7980D8
Darker −10%#343EB7
Darker −20%#29308F
Darker −30%#1E2367
Darker −40%#121640
More saturated +25%#3542E9
Less saturated −25%#6D72B1

Channel breakdown

R81
G90
B205
Red81 (31.8%)
Green90 (35.3%)
Blue205 (80.4%)
Hue235.65°
Saturation (HSL)55.36%
Lightness56.08%
Dominant channelBlue
Hex per channelR 51 · G 5A · B CD

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Every value on this page was computed from “515acd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.