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Colour

#405BFF

  • #405BFF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#405BFF is a blue with RGB values 64, 91, 255 and HSL 232°, 100%, 63%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#405BFF#405BFF
HEX#405BFF
RGBrgb(64, 91, 255)
RGB (0–1)0.251, 0.3569, 1
RGB percentages25.1%, 35.7%, 100%
HSLhsl(231.5, 100%, 62.5%)
HSV / HSBhsv(231.5, 74.9%, 100%)
CMYK74.9%, 64.3%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,217,855
CSS custom property--colour: #405BFF;

Brightness & contrast

Relative luminance0.15792WCAG 2.x, 0 is black and 1 is white
Perceived brightness116.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.05:1
Contrast with white5.05:1WCAG normal text: AA
Contrast with black4.16:1WCAG normal text: Fail
Greyscale equivalent#616161
Inverted#BFA400

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0078FFno red cones; affects about 1% of men; ΔE 24.3 from the original
Deuteranopia#0066FCno green cones; the most common form, about 1% of men; ΔE 11.8 from the original
Tritanopia#0087A5no blue cones; rare, and affects men and women equally; ΔE 88.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.05:1WCAG large text: AAA
Contrast with black, large text4.16:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 19.8Blue violet · ΔE 26.5Royal blue · ΔE 26.7Slate blue · ΔE 27.8Dark orchid · ΔE 31.2Medium blue · ΔE 31.7
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 19.79, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFE440
Analogous#40BBFF, #8440FF
Triadic#FF405B, #5BFF40
Split complementary#FF8440, #BBFF40
Tetradic#FF40BB, #FFE440, #40FF84

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#D9DEFF
Lighter +20%#A6B3FF
Lighter +10%#7387FF
Darker −10%#0D2FFF
Darker −20%#001FD9
Darker −30%#0017A6
Darker −40%#001073
More saturated +25%#405BFF
Less saturated −25%#586CE7

Channel breakdown

R64
G91
B255
Red64 (25.1%)
Green91 (35.7%)
Blue255 (100%)
Hue231.52°
Saturation (HSL)100%
Lightness62.55%
Dominant channelBlue
Hex per channelR 40 · G 5B · B FF

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