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Recognised as Colour

#374F5D

  • #374F5D
  • Blue
  • Dark
  • Nearest: Dark slate grey

#374F5D is a blue with RGB values 55, 79, 93 and HSL 202°, 26%, 29%. It is a dark colour, so white text on it reaches 8.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#374F5D#374F5D
HEX#374F5D
RGBrgb(55, 79, 93)
RGB (0–1)0.2157, 0.3098, 0.3647
RGB percentages21.6%, 31%, 36.5%
HSLhsl(202.1, 25.7%, 29%)
HSV / HSBhsv(202.1, 40.9%, 36.5%)
CMYK40.9%, 15.1%, 0%, 63.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,624,797
CSS custom property--colour: #374F5D;

Brightness & contrast

Relative luminance0.07195WCAG 2.x, 0 is black and 1 is white
Perceived brightness74.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.61:1
Contrast with white8.61:1WCAG normal text: AAA
Contrast with black2.44:1WCAG normal text: Fail
Greyscale equivalent#4B4B4B
Inverted#C8B0A2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#484E5Eno red cones; affects about 1% of men; ΔE 6.8 from the original
Deuteranopia#434A5Dno green cones; the most common form, about 1% of men; ΔE 7.3 from the original
Tritanopia#295353no blue cones; rare, and affects men and women equally; ΔE 11.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.61:1WCAG large text: AAA
Contrast with black, large text2.44:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 10Dim grey · ΔE 17.2Slate grey · ΔE 20.8Light slate grey · ΔE 23.8Gray · ΔE 24.6Teal · ΔE 28.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 9.96, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5D4537
Analogous#375D58, #373C5D
Triadic#5D374F, #4F5D37
Split complementary#5D373C, #5D5837
Tetradic#58375D, #5D4537, #3C5D37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9CB5C4
Lighter +30%#7C9EB1
Lighter +20%#5D859D
Lighter +10%#4A6A7D
Darker −10%#24343D
Darker −20%#11191D
Darker −30%#000000
Darker −40%#000000
More saturated +25%#245470
Less saturated −25%#4A4A4A

Channel breakdown

R55
G79
B93
Red55 (21.6%)
Green79 (31%)
Blue93 (36.5%)
Hue202.11°
Saturation (HSL)25.68%
Lightness29.02%
Dominant channelBlue
Hex per channelR 37 · G 4F · B 5D

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Every value on this page was computed from “374f5d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.