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Recognised as Colour

#283DD3

  • #283DD3
  • Blue
  • Dark
  • Nearest: Medium slateblue

#283DD3 is a blue with RGB values 40, 61, 211 and HSL 233°, 68%, 49%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Medium slateblue.

Colour values

#283DD3#283DD3
HEX#283DD3
RGBrgb(40, 61, 211)
RGB (0–1)0.1569, 0.2392, 0.8275
RGB percentages15.7%, 23.9%, 82.7%
HSLhsl(232.6, 68.1%, 49.2%)
HSV / HSBhsv(232.6, 81%, 82.7%)
CMYK81%, 71.1%, 0%, 17.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,637,267
CSS custom property--colour: #283DD3;

Brightness & contrast

Relative luminance0.08492WCAG 2.x, 0 is black and 1 is white
Perceived brightness88 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.78:1
Contrast with white7.78:1WCAG normal text: AAA
Contrast with black2.7:1WCAG normal text: Fail
Greyscale equivalent#434343
Inverted#D7C22C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005BD7no red cones; affects about 1% of men; ΔE 22.3 from the original
Deuteranopia#004AD0no green cones; the most common form, about 1% of men; ΔE 12.1 from the original
Tritanopia#006884no blue cones; rare, and affects men and women equally; ΔE 82.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.78:1WCAG large text: AAA
Contrast with black, large text2.7:1WCAG large text: Fail

Named colours

Medium slateblue · ΔE 22.1Dark blue · ΔE 22.8Blue violet · ΔE 25Slate blue · ΔE 25.1Navy · ΔE 25.9Medium blue · ΔE 26.8
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 22.08, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D3BE28
Analogous#2892D3, #6928D3
Triadic#D3283D, #3DD328
Split complementary#D36928, #92D328
Tetradic#D32893, #D3BE28, #28D369

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D1D5F6
Lighter +30%#A6AFEE
Lighter +20%#7B88E6
Lighter +10%#5062DE
Darker −10%#2031A8
Darker −20%#18247D
Darker −30%#101852
Darker −40%#070B28
More saturated +25%#0925F2
Less saturated −25%#4755B4

Channel breakdown

R40
G61
B211
Red40 (15.7%)
Green61 (23.9%)
Blue211 (82.7%)
Hue232.63°
Saturation (HSL)68.13%
Lightness49.22%
Dominant channelBlue
Hex per channelR 28 · G 3D · B D3

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Every value on this page was computed from “283dd3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.