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Colour

#337DDF

  • #337DDF
  • Blue
  • Dark
  • Nearest: Dodgerblue

#337DDF is a blue with RGB values 51, 125, 223 and HSL 214°, 73%, 54%. 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

#337DDF#337DDF
HEX#337DDF
RGBrgb(51, 125, 223)
RGB (0–1)0.2, 0.4902, 0.8745
RGB percentages20%, 49%, 87.5%
HSLhsl(214.2, 72.9%, 53.7%)
HSV / HSBhsv(214.2, 77.1%, 87.5%)
CMYK77.1%, 43.9%, 0%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,374,559
CSS custom property--colour: #337DDF;

Brightness & contrast

Relative luminance0.20699WCAG 2.x, 0 is black and 1 is white
Perceived brightness125 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.14:1
Contrast with white4.09:1WCAG normal text: Fail
Contrast with black5.14:1WCAG normal text: AA
Greyscale equivalent#747474
Inverted#CC8220

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4B86E3no red cones; affects about 1% of men; ΔE 5.1 from the original
Deuteranopia#2776DDno green cones; the most common form, about 1% of men; ΔE 4.4 from the original
Tritanopia#0094A3no blue cones; rare, and affects men and women equally; ΔE 55 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.09:1WCAG large text: AA
Contrast with black, large text5.14:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 9.8Cornflower blue · ΔE 11.9Royal blue · ΔE 18Slate blue · ΔE 25.8Medium purple · ΔE 26.4Steel blue · ΔE 28.7
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 9.78, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DF9533
Analogous#33D3DF, #3F33DF
Triadic#DF337D, #7DDF33
Split complementary#DF3F33, #D3DF33
Tetradic#DF33D3, #DF9533, #33DF3F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E3EDFB
Lighter +30%#B7D1F4
Lighter +20%#8BB5ED
Lighter +10%#5F99E6
Darker −10%#1E64C1
Darker −20%#174D95
Darker −30%#103669
Darker −40%#091F3D
More saturated +25%#1579FD
Less saturated −25%#5181C2

Channel breakdown

R51
G125
B223
Red51 (20%)
Green125 (49%)
Blue223 (87.5%)
Hue214.19°
Saturation (HSL)72.88%
Lightness53.73%
Dominant channelBlue
Hex per channelR 33 · G 7D · B DF

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Every value on this page was computed from “337ddf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.