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Recognised as Colour

#2A45BC

  • #2A45BC
  • Blue
  • Dark
  • Nearest: Slate blue

#2A45BC is a blue with RGB values 42, 69, 188 and HSL 229°, 63%, 45%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#2A45BC#2A45BC
HEX#2A45BC
RGBrgb(42, 69, 188)
RGB (0–1)0.1647, 0.2706, 0.7373
RGB percentages16.5%, 27.1%, 73.7%
HSLhsl(228.9, 63.5%, 45.1%)
HSV / HSBhsv(228.9, 77.7%, 73.7%)
CMYK77.7%, 63.3%, 0%, 26.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,770,364
CSS custom property--colour: #2A45BC;

Brightness & contrast

Relative luminance0.08379WCAG 2.x, 0 is black and 1 is white
Perceived brightness85.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.85:1
Contrast with white7.85:1WCAG normal text: AAA
Contrast with black2.68:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#D5BA43

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0059C0no red cones; affects about 1% of men; ΔE 15.9 from the original
Deuteranopia#004BBAno green cones; the most common form, about 1% of men; ΔE 7.5 from the original
Tritanopia#00647Ano blue cones; rare, and affects men and women equally; ΔE 67.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.85:1WCAG large text: AAA
Contrast with black, large text2.68:1WCAG large text: Fail

Named colours

Slate blue · ΔE 13.3Royal blue · ΔE 14.8Medium slateblue · ΔE 19.1Rebecca purple · ΔE 20.7Dark slateblue · ΔE 24.6Midnight blue · ΔE 24.6
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 13.29, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BCA12A
Analogous#2A8EBC, #582ABC
Triadic#BC2A45, #45BC2A
Split complementary#BC582A, #8EBC2A
Tetradic#BC2A8E, #BCA12A, #2ABC58

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C1CAF1
Lighter +30%#97A6E8
Lighter +20%#6E82DE
Lighter +10%#445FD5
Darker −10%#213692
Darker −20%#172669
Darker −30%#0E173F
Darker −40%#050815
More saturated +25%#0D33D9
Less saturated −25%#47579F

Channel breakdown

R42
G69
B188
Red42 (16.5%)
Green69 (27.1%)
Blue188 (73.7%)
Hue228.9°
Saturation (HSL)63.48%
Lightness45.1%
Dominant channelBlue
Hex per channelR 2A · G 45 · B BC

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Every value on this page was computed from “2a45bc” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.