Colour

#373A43

#373A43
Blue
Dark
Nearest: Dark slate grey

#373A43 is a blue with RGB values 55, 58, 67 and HSL 225°, 10%, 24%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#373A43#373A43

HEX#373A43

RGBrgb(55, 58, 67)

RGB (0–1)0.2157, 0.2275, 0.2627

RGB percentages21.6%, 22.7%, 26.3%

HSLhsl(225, 9.8%, 23.9%)

HSV / HSBhsv(225, 17.9%, 26.3%)

CMYK17.9%, 13.4%, 0%, 73.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer3,619,395

CSS custom property--colour: #373A43;

Brightness & contrast

Relative luminance0.04244WCAG 2.x, 0 is black and 1 is white

Perceived brightness58.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 11.36:1

Contrast with white11.36:1WCAG normal text: AAA

Contrast with black1.85:1WCAG normal text: Fail

Greyscale equivalent#3A3A3A

Inverted#C8C5BC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#373B43no red cones; affects about 1% of men; ΔE 0.9 from the original

Deuteranopia#373A43no green cones; the most common form, about 1% of men; ΔE 0 from the original

Tritanopia#343C3Dno blue cones; rare, and affects men and women equally; ΔE 5.9 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text11.36:1WCAG large text: AAA

Contrast with black, large text1.85:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 14.6 Dim grey · ΔE 20.9 Black · ΔE 25.2 Slate grey · ΔE 28.9 Gray · ΔE 29.7 Light slate grey · ΔE 32

Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 14.58, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#434037

Analogous#374043, #3A3743

Triadic#43373A, #3A4337

Split complementary#433A37, #404337

Tetradic#433740, #434037, #37433A

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#9A9EAC

Lighter +30%#7E8495

Lighter +20%#656A7B

Lighter +10%#4E525F

Darker −10%#202227

Darker −20%#090A0B

Darker −30%#000000

Darker −40%#000000

More saturated +25%#283252

Less saturated −25%#3D3D3D

Channel breakdown

R55

G58

B67

Red55 (21.6%)

Green58 (22.7%)

Blue67 (26.3%)

Hue225°

Saturation (HSL)9.84%

Lightness23.92%

Dominant channelBlue

Hex per channelR 37 · G 3A · B 43

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

#373A43

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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