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Recognised as Colour

#405BD3

  • #405BD3
  • Blue
  • Dark
  • Nearest: Royal blue

#405BD3 is a blue with RGB values 64, 91, 211 and HSL 229°, 63%, 54%. It is a dark colour, so white text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#405BD3#405BD3
HEX#405BD3
RGBrgb(64, 91, 211)
RGB (0–1)0.251, 0.3569, 0.8275
RGB percentages25.1%, 35.7%, 82.7%
HSLhsl(229, 62.6%, 53.9%)
HSV / HSBhsv(229, 69.7%, 82.7%)
CMYK69.7%, 56.9%, 0%, 17.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,217,811
CSS custom property--colour: #405BD3;

Brightness & contrast

Relative luminance0.13275WCAG 2.x, 0 is black and 1 is white
Perceived brightness105.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.75:1
Contrast with white5.75:1WCAG normal text: AA
Contrast with black3.66:1WCAG normal text: Fail
Greyscale equivalent#5E5E5E
Inverted#BFA42C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#006DD7no red cones; affects about 1% of men; ΔE 15.7 from the original
Deuteranopia#005FD1no green cones; the most common form, about 1% of men; ΔE 8.2 from the original
Tritanopia#00788Eno blue cones; rare, and affects men and women equally; ΔE 67.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.75:1WCAG large text: AAA
Contrast with black, large text3.66:1WCAG large text: AA

Named colours

Royal blue · ΔE 6Slate blue · ΔE 9.6Medium slateblue · ΔE 14.3Medium purple · ΔE 20.1Rebecca purple · ΔE 24.2Dodgerblue · ΔE 25.8
Nearest named CSS colourRoyal blue (#4169E1)ΔE 5.98, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D3B840
Analogous#40A4D3, #6F40D3
Triadic#D3405B, #5BD340
Split complementary#D36F40, #A4D340
Tetradic#D340A4, #D3B840, #40D36F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E6E9F9
Lighter +30%#BCC6F0
Lighter +20%#93A2E6
Lighter +10%#697FDD
Darker −10%#2A44B6
Darker −20%#20348D
Darker −30%#172563
Darker −40%#0D153A
More saturated +25%#2348F0
Less saturated −25%#5D6EB6

Channel breakdown

R64
G91
B211
Red64 (25.1%)
Green91 (35.7%)
Blue211 (82.7%)
Hue228.98°
Saturation (HSL)62.55%
Lightness53.92%
Dominant channelBlue
Hex per channelR 40 · G 5B · B D3

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Every value on this page was computed from “405bd3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.