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Recognised as Colour

#377CCC

  • #377CCC
  • Blue
  • Dark
  • Nearest: Cornflower blue

#377CCC is a blue with RGB values 55, 124, 204 and HSL 212°, 59%, 51%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#377CCC#377CCC
HEX#377CCC
RGBrgb(55, 124, 204)
RGB (0–1)0.2157, 0.4863, 0.8
RGB percentages21.6%, 48.6%, 80%
HSLhsl(212.2, 59.4%, 50.8%)
HSV / HSBhsv(212.2, 73%, 80%)
CMYK73%, 39.2%, 0%, 20%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,636,428
CSS custom property--colour: #377CCC;

Brightness & contrast

Relative luminance0.19587WCAG 2.x, 0 is black and 1 is white
Perceived brightness121.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.92:1
Contrast with white4.27:1WCAG normal text: Fail
Contrast with black4.92:1WCAG normal text: AA
Greyscale equivalent#737373
Inverted#C88333

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5782CFno red cones; affects about 1% of men; ΔE 5.5 from the original
Deuteranopia#3F74CAno green cones; the most common form, about 1% of men; ΔE 6.2 from the original
Tritanopia#008F9Ano blue cones; rare, and affects men and women equally; ΔE 46.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.27:1WCAG large text: AA
Contrast with black, large text4.92:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.4Dodgerblue · ΔE 18.2Steel blue · ΔE 18.2Royal blue · ΔE 27.5Dark slateblue · ΔE 29.6Medium purple · ΔE 31.7
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.37, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CC8737
Analogous#37C7CC, #3C37CC
Triadic#CC377C, #7CCC37
Split complementary#CC3C37, #C7CC37
Tetradic#CC37C7, #CC8737, #37CC3C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DAE6F5
Lighter +30%#B1CCEB
Lighter +20%#88B1E1
Lighter +10%#6097D6
Darker −10%#2A63A6
Darker −20%#204B7D
Darker −30%#163354
Darker −40%#0B1A2C
More saturated +25%#187AEB
Less saturated −25%#567EAD

Channel breakdown

R55
G124
B204
Red55 (21.6%)
Green124 (48.6%)
Blue204 (80%)
Hue212.21°
Saturation (HSL)59.36%
Lightness50.78%
Dominant channelBlue
Hex per channelR 37 · G 7C · B CC

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