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Colour

#397CDB

  • #397CDB
  • Blue
  • Dark
  • Nearest: Cornflower blue

#397CDB is a blue with RGB values 57, 124, 219 and HSL 215°, 69%, 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 Cornflower blue.

Colour values

#397CDB#397CDB
HEX#397CDB
RGBrgb(57, 124, 219)
RGB (0–1)0.2235, 0.4863, 0.8588
RGB percentages22.4%, 48.6%, 85.9%
HSLhsl(215.2, 69.2%, 54.1%)
HSV / HSBhsv(215.2, 74%, 85.9%)
CMYK74%, 43.4%, 0%, 14.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,767,515
CSS custom property--colour: #397CDB;

Brightness & contrast

Relative luminance0.204WCAG 2.x, 0 is black and 1 is white
Perceived brightness124.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.08:1
Contrast with white4.13:1WCAG normal text: Fail
Contrast with black5.08:1WCAG normal text: AA
Greyscale equivalent#757575
Inverted#C68324

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4D85DFno red cones; affects about 1% of men; ΔE 5 from the original
Deuteranopia#2E76D9no green cones; the most common form, about 1% of men; ΔE 3.6 from the original
Tritanopia#0092A1no blue cones; rare, and affects men and women equally; ΔE 53.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.13:1WCAG large text: AA
Contrast with black, large text5.08:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.2Dodgerblue · ΔE 11.3Royal blue · ΔE 19Slate blue · ΔE 26Medium purple · ΔE 26.2Steel blue · ΔE 27.2
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.21, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DB9839
Analogous#39CDDB, #4739DB
Triadic#DB397C, #7CDB39
Split complementary#DB4739, #CDDB39
Tetradic#DB39CD, #DB9839, #39DB47

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E6EEFA
Lighter +30%#BAD2F3
Lighter +20%#8FB5EB
Lighter +10%#6499E3
Darker −10%#2363BE
Darker −20%#1B4D93
Darker −30%#133668
Darker −40%#0B203D
More saturated +25%#1C77F8
Less saturated −25%#5681BE

Channel breakdown

R57
G124
B219
Red57 (22.4%)
Green124 (48.6%)
Blue219 (85.9%)
Hue215.19°
Saturation (HSL)69.23%
Lightness54.12%
Dominant channelBlue
Hex per channelR 39 · G 7C · B DB

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