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Recognised as Colour

#4255D9

  • #4255D9
  • Blue
  • Dark
  • Nearest: Medium slateblue

#4255D9 is a blue with RGB values 66, 85, 217 and HSL 232°, 67%, 55%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#4255D9#4255D9
HEX#4255D9
RGBrgb(66, 85, 217)
RGB (0–1)0.2588, 0.3333, 0.851
RGB percentages25.9%, 33.3%, 85.1%
HSLhsl(232.5, 66.5%, 55.5%)
HSV / HSBhsv(232.5, 69.6%, 85.1%)
CMYK69.6%, 60.8%, 0%, 14.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,347,353
CSS custom property--colour: #4255D9;

Brightness & contrast

Relative luminance0.12665WCAG 2.x, 0 is black and 1 is white
Perceived brightness104.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.94:1
Contrast with white5.94:1WCAG normal text: AA
Contrast with black3.53:1WCAG normal text: Fail
Greyscale equivalent#5A5A5A
Inverted#BDAA26

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#006BDDno red cones; affects about 1% of men; ΔE 18.5 from the original
Deuteranopia#005DD6no green cones; the most common form, about 1% of men; ΔE 11.1 from the original
Tritanopia#00768Fno blue cones; rare, and affects men and women equally; ΔE 73 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.94:1WCAG large text: AAA
Contrast with black, large text3.53:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 11.9Royal blue · ΔE 12.2Slate blue · ΔE 12.4Medium purple · ΔE 23.5Rebecca purple · ΔE 25.4Dark orchid · ΔE 30.6
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 11.91, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D9C642
Analogous#42A1D9, #7B42D9
Triadic#D94255, #55D942
Split complementary#D97A42, #A1D942
Tetradic#D942A1, #D9C642, #42D97A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ECEEFB
Lighter +30%#C1C8F3
Lighter +20%#97A1EA
Lighter +10%#6C7BE2
Darker −10%#273AC1
Darker −20%#1E2D97
Darker −30%#16216C
Darker −40%#0D1442
More saturated +25%#2640F5
Less saturated −25%#5E6ABD

Channel breakdown

R66
G85
B217
Red66 (25.9%)
Green85 (33.3%)
Blue217 (85.1%)
Hue232.45°
Saturation (HSL)66.52%
Lightness55.49%
Dominant channelBlue
Hex per channelR 42 · G 55 · B D9

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Every value on this page was computed from “4255d9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.