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Recognised as Colour

#1640DB

  • #1640DB
  • Blue
  • Dark
  • Nearest: Medium slateblue

#1640DB is a blue with RGB values 22, 64, 219 and HSL 227°, 82%, 47%. It is a dark colour, so white text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Medium slateblue.

Colour values

#1640DB#1640DB
HEX#1640DB
RGBrgb(22, 64, 219)
RGB (0–1)0.0863, 0.251, 0.8588
RGB percentages8.6%, 25.1%, 85.9%
HSLhsl(227.2, 81.7%, 47.3%)
HSV / HSBhsv(227.2, 90%, 85.9%)
CMYK90%, 70.8%, 0%, 14.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,458,395
CSS custom property--colour: #1640DB;

Brightness & contrast

Relative luminance0.08952WCAG 2.x, 0 is black and 1 is white
Perceived brightness89.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.53:1
Contrast with white7.53:1WCAG normal text: AAA
Contrast with black2.79:1WCAG normal text: Fail
Greyscale equivalent#424242
Inverted#E9BF24

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005EE0no red cones; affects about 1% of men; ΔE 21.5 from the original
Deuteranopia#004BD8no green cones; the most common form, about 1% of men; ΔE 10.1 from the original
Tritanopia#006D89no blue cones; rare, and affects men and women equally; ΔE 85.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.53:1WCAG large text: AAA
Contrast with black, large text2.79:1WCAG large text: Fail

Named colours

Medium slateblue · ΔE 23.4Dark blue · ΔE 25Blue violet · ΔE 25.3Medium blue · ΔE 25.7Slate blue · ΔE 27.4Royal blue · ΔE 28.3
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 23.43, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DBB116
Analogous#16A3DB, #4E16DB
Triadic#DB1640, #40DB16
Split complementary#DB4E16, #A3DB16
Tetradic#DB16A3, #DBB116, #16DB4E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C4CFF9
Lighter +30%#96AAF4
Lighter +20%#6784F0
Lighter +10%#395FEB
Darker −10%#1132AD
Darker −20%#0D257E
Darker −30%#081750
Darker −40%#030A22
More saturated +25%#0033F1
Less saturated −25%#3451BD

Channel breakdown

R22
G64
B219
Red22 (8.6%)
Green64 (25.1%)
Blue219 (85.9%)
Hue227.21°
Saturation (HSL)81.74%
Lightness47.25%
Dominant channelBlue
Hex per channelR 16 · G 40 · B DB

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Every value on this page was computed from “1640db” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.