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Colour

#37405A

  • #37405A
  • Blue
  • Dark
  • Nearest: Dark slate grey

#37405A is a blue with RGB values 55, 64, 90 and HSL 225°, 24%, 28%. It is a dark colour, so white text on it reaches 10.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#37405A#37405A
HEX#37405A
RGBrgb(55, 64, 90)
RGB (0–1)0.2157, 0.251, 0.3529
RGB percentages21.6%, 25.1%, 35.3%
HSLhsl(224.6, 24.1%, 28.4%)
HSV / HSBhsv(224.6, 38.9%, 35.3%)
CMYK38.9%, 28.9%, 0%, 64.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,620,954
CSS custom property--colour: #37405A;

Brightness & contrast

Relative luminance0.05217WCAG 2.x, 0 is black and 1 is white
Perceived brightness65.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.28:1
Contrast with white10.28:1WCAG normal text: AAA
Contrast with black2.04:1WCAG normal text: Fail
Greyscale equivalent#404040
Inverted#C8BFA5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#37425Bno red cones; affects about 1% of men; ΔE 1.3 from the original
Deuteranopia#343F59no green cones; the most common form, about 1% of men; ΔE 0.9 from the original
Tritanopia#2D4549no blue cones; rare, and affects men and women equally; ΔE 16.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.28:1WCAG large text: AAA
Contrast with black, large text2.04:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 20.5Dim grey · ΔE 24.2Slate grey · ΔE 26.8Light slate grey · ΔE 29.7Steel blue · ΔE 30.5Gray · ΔE 31.3
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 20.48, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5A5137
Analogous#37525A, #40375A
Triadic#5A3740, #405A37
Split complementary#5A3F37, #525A37
Tetradic#5A3752, #5A5137, #375A3F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9BA5C2
Lighter +30%#7B89AF
Lighter +20%#5E6D99
Lighter +10%#4A577A
Darker −10%#24293A
Darker −20%#10131B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#25376C
Less saturated −25%#494949

Channel breakdown

R55
G64
B90
Red55 (21.6%)
Green64 (25.1%)
Blue90 (35.3%)
Hue224.57°
Saturation (HSL)24.14%
Lightness28.43%
Dominant channelBlue
Hex per channelR 37 · G 40 · B 5A

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Every value on this page was computed from “37405a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.