Colour

#4251DF

#4251DF
Blue
Dark
Nearest: Medium slateblue

#4251DF is a blue with RGB values 66, 81, 223 and HSL 234°, 71%, 57%. It is a dark colour, so white text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#4251DF#4251DF

HEX#4251DF

RGBrgb(66, 81, 223)

RGB (0–1)0.2588, 0.3176, 0.8745

RGB percentages25.9%, 31.8%, 87.5%

HSLhsl(234.3, 71%, 56.7%)

HSV / HSBhsv(234.3, 70.4%, 87.5%)

CMYK70.4%, 63.7%, 0%, 12.5%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,346,335

CSS custom property--colour: #4251DF;

Brightness & contrast

Relative luminance0.12371WCAG 2.x, 0 is black and 1 is white

Perceived brightness104 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.04:1

Contrast with white6.04:1WCAG normal text: AA

Contrast with black3.47:1WCAG normal text: Fail

Greyscale equivalent#585858

Inverted#BDAE20

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#006AE4no red cones; affects about 1% of men; ΔE 19.9 from the original

Deuteranopia#005BDCno green cones; the most common form, about 1% of men; ΔE 12.1 from the original

Tritanopia#007691no blue cones; rare, and affects men and women equally; ΔE 77.9 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text6.04:1WCAG large text: AAA

Contrast with black, large text3.47:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 13.4 Slate blue · ΔE 17.2 Royal blue · ΔE 17.9 Medium purple · ΔE 27.5 Dark orchid · ΔE 28.2 Rebecca purple · ΔE 28.3

Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 13.44, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#DFD042

Analogous#42A0DF, #8142DF

Triadic#DF4251, #51DF42

Split complementary#DF8142, #A0DF42

Tetradic#DF42A0, #DFD042, #42DF81

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#F0F2FD

Lighter +30%#C5C9F5

Lighter +20%#99A1EE

Lighter +10%#6E79E6

Darker −10%#2233CC

Darker −20%#1B28A0

Darker −30%#141D74

Darker −40%#0C1249

More saturated +25%#263BFB

Less saturated −25%#5E67C3

Channel breakdown

R66

G81

B223

Red66 (25.9%)

Green81 (31.8%)

Blue223 (87.5%)

Hue234.27°

Saturation (HSL)71.04%

Lightness56.67%

Dominant channelBlue

Hex per channelR 42 · G 51 · B DF

Keep nerding

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#4251DF

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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