Colour

#233B66

#233B66
Blue
Dark
Nearest: Dark slateblue

#233B66 is a blue with RGB values 35, 59, 102 and HSL 219°, 49%, 27%. It is a dark colour, so white text on it reaches 11.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#233B66#233B66

HEX#233B66

RGBrgb(35, 59, 102)

RGB (0–1)0.1373, 0.2314, 0.4

RGB percentages13.7%, 23.1%, 40%

HSLhsl(218.5, 48.9%, 26.9%)

HSV / HSBhsv(218.5, 65.7%, 40%)

CMYK65.7%, 42.2%, 0%, 60%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,308,966

CSS custom property--colour: #233B66;

Brightness & contrast

Relative luminance0.04445WCAG 2.x, 0 is black and 1 is white

Perceived brightness60 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 11.12:1

Contrast with white11.12:1WCAG normal text: AAA

Contrast with black1.89:1WCAG normal text: Fail

Greyscale equivalent#393939

Inverted#DCC499

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#283F68no red cones; affects about 1% of men; ΔE 2.3 from the original

Deuteranopia#1F3965no green cones; the most common form, about 1% of men; ΔE 1.2 from the original

Tritanopia#00454Bno blue cones; rare, and affects men and women equally; ΔE 29.4 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text11.12:1WCAG large text: AAA

Contrast with black, large text1.89:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 25.3 Steel blue · ΔE 29.4 Dark slate grey · ΔE 30.7 Slate grey · ΔE 33.8 Dim grey · ΔE 34.6 Midnight blue · ΔE 34.9

Nearest named CSS colourDark slateblue (#483D8B)ΔE 25.25, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#664E23

Analogous#235D66, #2C2366

Triadic#66233B, #3B6623

Split complementary#662C23, #5D6623

Tetradic#66235D, #664E23, #23662C

Tints, shades & saturation

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

Lighter +40%#819FD4

Lighter +30%#5B82C7

Lighter +20%#3D67B2

Lighter +10%#30518C

Darker −10%#162540

Darker −20%#090F1A

Darker −30%#000000

Darker −40%#000000

More saturated +25%#123677

Less saturated −25%#344055

Channel breakdown

R35

G59

B102

Red35 (13.7%)

Green59 (23.1%)

Blue102 (40%)

Hue218.51°

Saturation (HSL)48.91%

Lightness26.86%

Dominant channelBlue

Hex per channelR 23 · G 3B · B 66

Keep nerding

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#233B66

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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