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Recognised as Colour

#374D80

  • #374D80
  • Blue
  • Dark
  • Nearest: Dark slateblue

#374D80 is a blue with RGB values 55, 77, 128 and HSL 222°, 40%, 36%. It is a dark colour, so white text on it reaches 8.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#374D80#374D80
HEX#374D80
RGBrgb(55, 77, 128)
RGB (0–1)0.2157, 0.302, 0.502
RGB percentages21.6%, 30.2%, 50.2%
HSLhsl(221.9, 39.9%, 35.9%)
HSV / HSBhsv(221.9, 57%, 50.2%)
CMYK57%, 39.8%, 0%, 49.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,624,320
CSS custom property--colour: #374D80;

Brightness & contrast

Relative luminance0.07678WCAG 2.x, 0 is black and 1 is white
Perceived brightness79.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.28:1
Contrast with white8.28:1WCAG normal text: AAA
Contrast with black2.54:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#C8B27F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#385282no red cones; affects about 1% of men; ΔE 3.2 from the original
Deuteranopia#2F4B7Fno green cones; the most common form, about 1% of men; ΔE 1.8 from the original
Tritanopia#0C5860no blue cones; rare, and affects men and women equally; ΔE 33.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.28:1WCAG large text: AAA
Contrast with black, large text2.54:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 21.3Steel blue · ΔE 22.5Slate grey · ΔE 30.2Light slate grey · ΔE 32Cornflower blue · ΔE 33.8Dark slate grey · ΔE 33.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 21.34, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#806A37
Analogous#377180, #463780
Triadic#80374D, #4D8037
Split complementary#804637, #728037
Tetradic#803771, #806A37, #378046

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A9B8DA
Lighter +30%#859ACB
Lighter +20%#627DBB
Lighter +10%#4662A4
Darker −10%#28385C
Darker −20%#182239
Darker −30%#090D15
Darker −40%#000000
More saturated +25%#204497
Less saturated −25%#4E5669

Channel breakdown

R55
G77
B128
Red55 (21.6%)
Green77 (30.2%)
Blue128 (50.2%)
Hue221.92°
Saturation (HSL)39.89%
Lightness35.88%
Dominant channelBlue
Hex per channelR 37 · G 4D · B 80

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Every value on this page was computed from “374d80” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.