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Recognised as Colour

#423DB8

  • #423DB8
  • Blue
  • Dark
  • Nearest: Slate blue

#423DB8 is a blue with RGB values 66, 61, 184 and HSL 242°, 50%, 48%. It is a dark colour, so white text on it reaches 8.1:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#423DB8#423DB8
HEX#423DB8
RGBrgb(66, 61, 184)
RGB (0–1)0.2588, 0.2392, 0.7216
RGB percentages25.9%, 23.9%, 72.2%
HSLhsl(242.4, 50.2%, 48%)
HSV / HSBhsv(242.4, 66.8%, 72.2%)
CMYK64.1%, 66.8%, 0%, 27.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,341,176
CSS custom property--colour: #423DB8;

Brightness & contrast

Relative luminance0.07956WCAG 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 8.1:1
Contrast with white8.1:1WCAG normal text: AAA
Contrast with black2.59:1WCAG normal text: Fail
Greyscale equivalent#474747
Inverted#BDC247

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0055BCno red cones; affects about 1% of men; ΔE 20.6 from the original
Deuteranopia#004AB6no green cones; the most common form, about 1% of men; ΔE 14.9 from the original
Tritanopia#005D75no blue cones; rare, and affects men and women equally; ΔE 69.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.1:1WCAG large text: AAA
Contrast with black, large text2.59:1WCAG large text: Fail

Named colours

Slate blue · ΔE 13.7Rebecca purple · ΔE 17.5Medium slateblue · ΔE 18.4Royal blue · ΔE 19.4Indigo · ΔE 21.1Navy · ΔE 22.3
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 13.66, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B3B83D
Analogous#3D75B8, #803DB8
Triadic#B8423D, #3DB842
Split complementary#B8803D, #75B83D
Tetradic#B83D75, #B3B83D, #3DB880

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D2D1F0
Lighter +30%#ADABE3
Lighter +20%#8885D6
Lighter +10%#635ECA
Darker −10%#343092
Darker −20%#27246B
Darker −30%#191745
Darker −40%#0B0A1F
More saturated +25%#261ED7
Less saturated −25%#5E5C99

Channel breakdown

R66
G61
B184
Red66 (25.9%)
Green61 (23.9%)
Blue184 (72.2%)
Hue242.44°
Saturation (HSL)50.2%
Lightness48.04%
Dominant channelBlue
Hex per channelR 42 · G 3D · B B8

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Every value on this page was computed from “423db8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.