Colour

#556FFF

#556FFF
Blue
Dark
Nearest: Medium slateblue

#556FFF is a blue with RGB values 85, 111, 255 and HSL 231°, 100%, 67%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#556FFF#556FFF

HEX#556FFF

RGBrgb(85, 111, 255)

RGB (0–1)0.3333, 0.4353, 1

RGB percentages33.3%, 43.5%, 100%

HSLhsl(230.8, 100%, 66.7%)

HSV / HSBhsv(230.8, 66.7%, 100%)

CMYK66.7%, 56.5%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer5,599,231

CSS custom property--colour: #556FFF;

Brightness & contrast

Relative luminance0.2052WCAG 2.x, 0 is black and 1 is white

Perceived brightness129.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.1:1

Contrast with white4.11:1WCAG normal text: Fail

Contrast with black5.1:1WCAG normal text: AA

Greyscale equivalent#747474

Inverted#AA9000

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0085FFno red cones; affects about 1% of men; ΔE 21.2 from the original

Deuteranopia#0076FCno green cones; the most common form, about 1% of men; ΔE 11.8 from the original

Tritanopia#0092ACno blue cones; rare, and affects men and women equally; ΔE 78.3 from the original

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

Contrast with white, large text4.11:1WCAG large text: AA

Contrast with black, large text5.1:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 10.6 Royal blue · ΔE 14 Slate blue · ΔE 18.2 Medium purple · ΔE 24.6 Dodgerblue · ΔE 28.9 Dark orchid · ΔE 34

Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 10.62, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#FFE555

Analogous#55C4FF, #9055FF

Triadic#FF556F, #6FFF55

Split complementary#FF9055, #C4FF55

Tetradic#FF55C4, #FFE555, #55FF90

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#EEF1FF

Lighter +20%#BBC5FF

Lighter +10%#889AFF

Darker −10%#2244FF

Darker −20%#0024EE

Darker −30%#001DBB

Darker −40%#001588

More saturated +25%#556FFF

Less saturated −25%#6A7EEA

Channel breakdown

R85

G111

B255

Red85 (33.3%)

Green111 (43.5%)

Blue255 (100%)

Hue230.82°

Saturation (HSL)100%

Lightness66.67%

Dominant channelBlue

Hex per channelR 55 · G 6F · B FF

Keep nerding

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#556FFF

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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