Recognised as Colour

#421BD8

#421BD8
Blue
Dark
Nearest: Medium blue

#421BD8 is a blue with RGB values 66, 27, 216 and HSL 252°, 78%, 48%. It is a dark colour, so white text on it reaches 8.8:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#421BD8#421BD8

HEX#421BD8

RGBrgb(66, 27, 216)

RGB (0–1)0.2588, 0.1059, 0.8471

RGB percentages25.9%, 10.6%, 84.7%

HSLhsl(252.4, 77.8%, 47.6%)

HSV / HSBhsv(252.4, 87.5%, 84.7%)

CMYK69.4%, 87.5%, 0%, 15.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,332,504

CSS custom property--colour: #421BD8;

Brightness & contrast

Relative luminance0.069WCAG 2.x, 0 is black and 1 is white

Perceived brightness84 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 8.82:1

Contrast with white8.82:1WCAG normal text: AAA

Contrast with black2.38:1WCAG normal text: Fail

Greyscale equivalent#313131

Inverted#BDE427

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0051DDno red cones; affects about 1% of men; ΔE 32.5 from the original

Deuteranopia#0042D5no green cones; the most common form, about 1% of men; ΔE 24.7 from the original

Tritanopia#005C80no blue cones; rare, and affects men and women equally; ΔE 95.9 from the original

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

Contrast with white, large text8.82:1WCAG large text: AAA

Contrast with black, large text2.38:1WCAG large text: Fail

Named colours

Medium blue · ΔE 8.3 Blue violet · ΔE 16.7 Dark violet · ΔE 21.3 Blue · ΔE 25.2 Dark blue · ΔE 28.9 Dark orchid · ΔE 29.2

Nearest named CSS colourMedium blue (#0000CD)ΔE 8.32, clearly different but related

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#B1D81B

Analogous#1B52D8, #A11BD8

Triadic#D8421B, #1BD842

Split complementary#D8A11B, #52D81B

Tetradic#D81B52, #B1D81B, #1BD8A1

Tints, shades & saturation

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

Lighter +40%#D1C7F8

Lighter +30%#AC9AF2

Lighter +20%#876CED

Lighter +10%#623FE7

Darker −10%#3415AB

Darker −20%#26107D

Darker −30%#180A50

Darker −40%#0B0423

More saturated +25%#3200F3

Less saturated −25%#5439BA

Channel breakdown

R66

G27

B216

Red66 (25.9%)

Green27 (10.6%)

Blue216 (84.7%)

Hue252.38°

Saturation (HSL)77.78%

Lightness47.65%

Dominant channelBlue

Hex per channelR 42 · G 1B · B D8

Keep nerding

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

#421BD8

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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