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Colour

#377BDB

  • #377BDB
  • Blue
  • Dark
  • Nearest: Dodgerblue

#377BDB is a blue with RGB values 55, 123, 219 and HSL 215°, 69%, 54%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#377BDB#377BDB
HEX#377BDB
RGBrgb(55, 123, 219)
RGB (0–1)0.2157, 0.4824, 0.8588
RGB percentages21.6%, 48.2%, 85.9%
HSLhsl(215.1, 69.5%, 53.7%)
HSV / HSBhsv(215.1, 74.9%, 85.9%)
CMYK74.9%, 43.8%, 0%, 14.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,636,187
CSS custom property--colour: #377BDB;

Brightness & contrast

Relative luminance0.20093WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.02:1
Contrast with white4.18:1WCAG normal text: Fail
Contrast with black5.02:1WCAG normal text: AA
Greyscale equivalent#737373
Inverted#C88424

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4A84DFno red cones; affects about 1% of men; ΔE 4.9 from the original
Deuteranopia#2A75D9no green cones; the most common form, about 1% of men; ΔE 3.6 from the original
Tritanopia#0092A0no blue cones; rare, and affects men and women equally; ΔE 54.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.18:1WCAG large text: AA
Contrast with black, large text5.02:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 11.1Cornflower blue · ΔE 11.8Royal blue · ΔE 18.3Slate blue · ΔE 25.5Medium purple · ΔE 26Steel blue · ΔE 27.9
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 11.12, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DB9737
Analogous#37CDDB, #4537DB
Triadic#DB377B, #7BDB37
Split complementary#DB4537, #CDDB37
Tetradic#DB37CD, #DB9737, #37DB45

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E4EDFA
Lighter +30%#B9D1F2
Lighter +20%#8DB4EB
Lighter +10%#6298E3
Darker −10%#2262BD
Darker −20%#1A4C92
Darker −30%#123567
Darker −40%#0B1F3B
More saturated +25%#1976F9
Less saturated −25%#5580BE

Channel breakdown

R55
G123
B219
Red55 (21.6%)
Green123 (48.2%)
Blue219 (85.9%)
Hue215.12°
Saturation (HSL)69.49%
Lightness53.73%
Dominant channelBlue
Hex per channelR 37 · G 7B · B DB

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Every value on this page was computed from “377bdb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.