Colour

#337CDD

#337CDD
Blue
Dark
Nearest: Dodgerblue

#337CDD is a blue with RGB values 51, 124, 221 and HSL 214°, 71%, 53%. It is a dark colour, so black text on it reaches 5.1:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#337CDD#337CDD

HEX#337CDD

RGBrgb(51, 124, 221)

RGB (0–1)0.2, 0.4863, 0.8667

RGB percentages20%, 48.6%, 86.7%

HSLhsl(214.2, 71.4%, 53.3%)

HSV / HSBhsv(214.2, 76.9%, 86.7%)

CMYK76.9%, 43.9%, 0%, 13.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer3,374,301

CSS custom property--colour: #337CDD;

Brightness & contrast

Relative luminance0.2034WCAG 2.x, 0 is black and 1 is white

Perceived brightness124 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.07:1

Contrast with white4.14:1WCAG normal text: Fail

Contrast with black5.07:1WCAG normal text: AA

Greyscale equivalent#737373

Inverted#CC8322

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#4A85E1no red cones; affects about 1% of men; ΔE 5 from the original

Deuteranopia#2875DBno green cones; the most common form, about 1% of men; ΔE 4.4 from the original

Tritanopia#0093A2no blue cones; rare, and affects men and women equally; ΔE 54.5 from the original

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

Contrast with white, large text4.14:1WCAG large text: AA

Contrast with black, large text5.07:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 10.4 Cornflower blue · ΔE 11.9 Royal blue · ΔE 18.3 Slate blue · ΔE 25.9 Medium purple · ΔE 26.4 Steel blue · ΔE 28.2

Nearest named CSS colourDodgerblue (#1E90FF)ΔE 10.39, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#DD9433

Analogous#33D1DD, #3F33DD

Triadic#DD337C, #7CDD33

Split complementary#DD3F33, #D1DD33

Tetradic#DD33D1, #DD9433, #33DD3F

Tints, shades & saturation

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

Lighter +40%#E2ECFA

Lighter +30%#B6D0F3

Lighter +20%#8AB4EC

Lighter +10%#5F98E4

Darker −10%#2063BD

Darker −20%#184C92

Darker −30%#113566

Darker −40%#0A1F3A

More saturated +25%#1578FB

Less saturated −25%#5180BF

Channel breakdown

R51

G124

B221

Red51 (20%)

Green124 (48.6%)

Blue221 (86.7%)

Hue214.24°

Saturation (HSL)71.43%

Lightness53.33%

Dominant channelBlue

Hex per channelR 33 · G 7C · B DD

Keep nerding

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

#337CDD

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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