Colour

#21218C

#21218C
Blue
Dark
Nearest: Midnight blue

#21218C is a blue with RGB values 33, 33, 140 and HSL 240°, 62%, 34%. It is a dark colour, so white text on it reaches 12.6:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#21218C#21218C

HEX#21218C

RGBrgb(33, 33, 140)

RGB (0–1)0.1294, 0.1294, 0.549

RGB percentages12.9%, 12.9%, 54.9%

HSLhsl(240, 61.8%, 33.9%)

HSV / HSBhsv(240, 76.4%, 54.9%)

CMYK76.4%, 76.4%, 0%, 45.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,171,276

CSS custom property--colour: #21218C;

Brightness & contrast

Relative luminance0.03304WCAG 2.x, 0 is black and 1 is white

Perceived brightness56.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 12.64:1

Contrast with white12.64:1WCAG normal text: AAA

Contrast with black1.66:1WCAG normal text: Fail

Greyscale equivalent#292929

Inverted#DEDE73

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#00388Fno red cones; affects about 1% of men; ΔE 18.2 from the original

Deuteranopia#002E8Ano green cones; the most common form, about 1% of men; ΔE 12.2 from the original

Tritanopia#004055no blue cones; rare, and affects men and women equally; ΔE 62.4 from the original

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

Contrast with white, large text12.64:1WCAG large text: AAA

Contrast with black, large text1.66:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 12 Navy · ΔE 14.3 Indigo · ΔE 15.1 Rebecca purple · ΔE 17.1 Dark blue · ΔE 17.6 Dark slateblue · ΔE 22.2

Nearest named CSS colourMidnight blue (#191970)ΔE 11.95, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#8C8C21

Analogous#21578C, #57218C

Triadic#8C2121, #218C21

Split complementary#8C5721, #578C21

Tetradic#8C2157, #8C8C21, #218C57

Tints, shades & saturation

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

Lighter +40%#9393E6

Lighter +30%#6A6ADC

Lighter +20%#4141D2

Lighter +10%#2B2BB5

Darker −10%#171763

Darker −20%#0E0E39

Darker −30%#040410

Darker −40%#000000

More saturated +25%#0B0BA2

Less saturated −25%#373776

Channel breakdown

R33

G33

B140

Red33 (12.9%)

Green33 (12.9%)

Blue140 (54.9%)

Hue240°

Saturation (HSL)61.85%

Lightness33.92%

Dominant channelBlue

Hex per channelR 21 · G 21 · B 8C

Keep nerding

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#21218C

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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