Recognised as Colour

#5166CC

#5166CC
Blue
Dark
Nearest: Royal blue

#5166CC is a blue with RGB values 81, 102, 204 and HSL 230°, 55%, 56%. It is a dark colour, so white text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#5166CC#5166CC

HEX#5166CC

RGBrgb(81, 102, 204)

RGB (0–1)0.3176, 0.4, 0.8

RGB percentages31.8%, 40%, 80%

HSLhsl(229.8, 54.7%, 55.9%)

HSV / HSBhsv(229.8, 60.3%, 80%)

CMYK60.3%, 50%, 0%, 20%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer5,334,732

CSS custom property--colour: #5166CC;

Brightness & contrast

Relative luminance0.15612WCAG 2.x, 0 is black and 1 is white

Perceived brightness113.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.09:1

Contrast with white5.09:1WCAG normal text: AA

Contrast with black4.12:1WCAG normal text: Fail

Greyscale equivalent#696969

Inverted#AE9933

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#2F74D0no red cones; affects about 1% of men; ΔE 12.9 from the original

Deuteranopia#1469CAno green cones; the most common form, about 1% of men; ΔE 10.2 from the original

Tritanopia#007D8Fno blue cones; rare, and affects men and women equally; ΔE 59 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text5.09:1WCAG large text: AAA

Contrast with black, large text4.12:1WCAG large text: AA

Named colours

Royal blue · ΔE 10.3 Slate blue · ΔE 13 Medium purple · ΔE 16.8 Dodgerblue · ΔE 20.2 Dark slateblue · ΔE 20.8 Medium slateblue · ΔE 21.1

Nearest named CSS colourRoyal blue (#4169E1)ΔE 10.3, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#CCB751

Analogous#51A4CC, #7951CC

Triadic#CC5166, #66CC51

Split complementary#CC7951, #A4CC51

Tetradic#CC51A4, #CCB751, #51CC79

Tints, shades & saturation

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

Lighter +40%#EFF1FA

Lighter +30%#C7CEEF

Lighter +20%#A0ABE3

Lighter +10%#7889D8

Darker −10%#354BB5

Darker −20%#293B8E

Darker −30%#1E2A66

Darker −40%#121A3F

More saturated +25%#3553E8

Less saturated −25%#6D79B0

Channel breakdown

R81

G102

B204

Red81 (31.8%)

Green102 (40%)

Blue204 (80%)

Hue229.76°

Saturation (HSL)54.67%

Lightness55.88%

Dominant channelBlue

Hex per channelR 51 · G 66 · B CC

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#5166CC

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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