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Recognised as Colour

#397FE5

  • #397FE5
  • Blue
  • Dark
  • Nearest: Dodgerblue

#397FE5 is a blue with RGB values 57, 127, 229 and HSL 216°, 77%, 56%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#397FE5#397FE5
HEX#397FE5
RGBrgb(57, 127, 229)
RGB (0–1)0.2235, 0.498, 0.898
RGB percentages22.4%, 49.8%, 89.8%
HSLhsl(215.6, 76.8%, 56.1%)
HSV / HSBhsv(215.6, 75.1%, 89.8%)
CMYK75.1%, 44.5%, 0%, 10.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,768,293
CSS custom property--colour: #397FE5;

Brightness & contrast

Relative luminance0.21706WCAG 2.x, 0 is black and 1 is white
Perceived brightness128.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.34:1
Contrast with white3.93:1WCAG normal text: Fail
Contrast with black5.34:1WCAG normal text: AA
Greyscale equivalent#777777
Inverted#C6801A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4A89E9no red cones; affects about 1% of men; ΔE 5.6 from the original
Deuteranopia#2679E3no green cones; the most common form, about 1% of men; ΔE 3.6 from the original
Tritanopia#0097A7no blue cones; rare, and affects men and women equally; ΔE 57 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.93:1WCAG large text: AA
Contrast with black, large text5.34:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 8.3Cornflower blue · ΔE 12.5Royal blue · ΔE 16.2Slate blue · ΔE 24.6Medium purple · ΔE 25.2Medium slateblue · ΔE 29.1
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 8.35, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E59F39
Analogous#39D5E5, #4939E5
Triadic#E5397F, #7FE539
Split complementary#E54939, #D5E539
Tetradic#E539D5, #E59F39, #39E549

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EDF4FD
Lighter +30%#C0D6F7
Lighter +20%#93B9F1
Lighter +10%#669CEB
Darker −10%#1B65D0
Darker −20%#154FA3
Darker −30%#0F3976
Darker −40%#0A2348
More saturated +25%#1F7AFF
Less saturated −25%#5584C9

Channel breakdown

R57
G127
B229
Red57 (22.4%)
Green127 (49.8%)
Blue229 (89.8%)
Hue215.58°
Saturation (HSL)76.79%
Lightness56.08%
Dominant channelBlue
Hex per channelR 39 · G 7F · B E5

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Every value on this page was computed from “397fe5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.