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Recognised as Colour

#243BBD

  • #243BBD
  • Blue
  • Dark
  • Nearest: Slate blue

#243BBD is a blue with RGB values 36, 59, 189 and HSL 231°, 68%, 44%. It is a dark colour, so white text on it reaches 8.6:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#243BBD#243BBD
HEX#243BBD
RGBrgb(36, 59, 189)
RGB (0–1)0.1412, 0.2314, 0.7412
RGB percentages14.1%, 23.1%, 74.1%
HSLhsl(231, 68%, 44.1%)
HSV / HSBhsv(231, 81%, 74.1%)
CMYK81%, 68.8%, 0%, 25.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,374,589
CSS custom property--colour: #243BBD;

Brightness & contrast

Relative luminance0.07177WCAG 2.x, 0 is black and 1 is white
Perceived brightness80.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.62:1
Contrast with white8.62:1WCAG normal text: AAA
Contrast with black2.44:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#DBC442

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0053C1no red cones; affects about 1% of men; ΔE 18.3 from the original
Deuteranopia#0044BBno green cones; the most common form, about 1% of men; ΔE 9 from the original
Tritanopia#005F77no blue cones; rare, and affects men and women equally; ΔE 73.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.62:1WCAG large text: AAA
Contrast with black, large text2.44:1WCAG large text: Fail

Named colours

Slate blue · ΔE 18.3Medium slateblue · ΔE 20.6Dark blue · ΔE 20.7Royal blue · ΔE 20.9Navy · ΔE 21.6Rebecca purple · ΔE 23.2
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 18.29, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BDA624
Analogous#2487BD, #5A24BD
Triadic#BD243B, #3BBD24
Split complementary#BD5A24, #87BD24
Tetradic#BD2487, #BDA624, #24BD5A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BBC3F2
Lighter +30%#909EEA
Lighter +20%#6578E2
Lighter +10%#3A52DA
Darker −10%#1C2E92
Darker −20%#142067
Darker −30%#0C133C
Darker −40%#030612
More saturated +25%#0827D9
Less saturated −25%#404FA1

Channel breakdown

R36
G59
B189
Red36 (14.1%)
Green59 (23.1%)
Blue189 (74.1%)
Hue230.98°
Saturation (HSL)68%
Lightness44.12%
Dominant channelBlue
Hex per channelR 24 · G 3B · B BD

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Every value on this page was computed from “243bbd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.