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Recognised as Colour

#377CAC

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

#377CAC is a blue with RGB values 55, 124, 172 and HSL 205°, 52%, 45%. 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

#377CAC#377CAC
HEX#377CAC
RGBrgb(55, 124, 172)
RGB (0–1)0.2157, 0.4863, 0.6745
RGB percentages21.6%, 48.6%, 67.5%
HSLhsl(204.6, 51.5%, 44.5%)
HSV / HSBhsv(204.6, 68%, 67.5%)
CMYK68%, 27.9%, 0%, 32.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,636,396
CSS custom property--colour: #377CAC;

Brightness & contrast

Relative luminance0.18206WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.64:1
Contrast with white4.52:1WCAG normal text: AA
Contrast with black4.64:1WCAG normal text: AA
Greyscale equivalent#717171
Inverted#C88353

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#667DAEno red cones; affects about 1% of men; ΔE 11.4 from the original
Deuteranopia#5671ABno green cones; the most common form, about 1% of men; ΔE 13 from the original
Tritanopia#00888Dno 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 text4.52:1WCAG large text: AAA
Contrast with black, large text4.64:1WCAG large text: AAA

Named colours

Steel blue · ΔE 3.3Slate grey · ΔE 21.9Light slate grey · ΔE 22Cornflower blue · ΔE 26.2Deep skyblue · ΔE 27.7Cadetblue · ΔE 30.2
Nearest named CSS colourSteel blue (#4682B4)ΔE 3.35, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AC6737
Analogous#37ACA2, #3741AC
Triadic#AC377C, #7CAC37
Split complementary#AC3741, #ACA237
Tetradic#A237AC, #AC6737, #41AC37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C3DBEC
Lighter +30%#9CC4E0
Lighter +20%#76ADD3
Lighter +10%#4F96C7
Darker −10%#2B6085
Darker −20%#1E445F
Darker −30%#122838
Darker −40%#060D11
More saturated +25%#1B81C8
Less saturated −25%#537790

Channel breakdown

R55
G124
B172
Red55 (21.6%)
Green124 (48.6%)
Blue172 (67.5%)
Hue204.62°
Saturation (HSL)51.54%
Lightness44.51%
Dominant channelBlue
Hex per channelR 37 · G 7C · B AC

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