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Recognised as Colour

#377CAB

  • #377CAB
  • Blue
  • Dark
  • Nearest: Steel blue

#377CAB is a blue with RGB values 55, 124, 171 and HSL 204°, 51%, 44%. It is a dark colour, so black text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#377CAB#377CAB
HEX#377CAB
RGBrgb(55, 124, 171)
RGB (0–1)0.2157, 0.4863, 0.6706
RGB percentages21.6%, 48.6%, 67.1%
HSLhsl(204.3, 51.3%, 44.3%)
HSV / HSBhsv(204.3, 67.8%, 67.1%)
CMYK67.8%, 27.5%, 0%, 32.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,636,395
CSS custom property--colour: #377CAB;

Brightness & contrast

Relative luminance0.18168WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.63:1
Contrast with white4.53:1WCAG normal text: AA
Contrast with black4.63:1WCAG normal text: AA
Greyscale equivalent#717171
Inverted#C88354

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#677CADno red cones; affects about 1% of men; ΔE 12.1 from the original
Deuteranopia#5771AAno green cones; the most common form, about 1% of men; ΔE 13.3 from the original
Tritanopia#00888Cno blue cones; rare, and affects men and women equally; ΔE 30.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.53:1WCAG large text: AAA
Contrast with black, large text4.63:1WCAG large text: AAA

Named colours

Steel blue · ΔE 3.7Slate grey · ΔE 21.4Light slate grey · ΔE 21.6Cornflower blue · ΔE 26.8Deep skyblue · ΔE 27.8Cadetblue · ΔE 29.7
Nearest named CSS colourSteel blue (#4682B4)ΔE 3.68, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AB6637
Analogous#37ABA0, #3742AB
Triadic#AB377C, #7CAB37
Split complementary#AB3742, #ABA037
Tetradic#A037AB, #AB6637, #42AB37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C2DBEC
Lighter +30%#9CC4DF
Lighter +20%#75ADD3
Lighter +10%#4F96C6
Darker −10%#2B6084
Darker −20%#1E445E
Darker −30%#122837
Darker −40%#050C11
More saturated +25%#1B81C7
Less saturated −25%#53778F

Channel breakdown

R55
G124
B171
Red55 (21.6%)
Green124 (48.6%)
Blue171 (67.1%)
Hue204.31°
Saturation (HSL)51.33%
Lightness44.31%
Dominant channelBlue
Hex per channelR 37 · G 7C · B AB

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