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Recognised as Colour

#233B5C

  • #233B5C
  • Blue
  • Dark
  • Nearest: Dark slate grey

#233B5C is a blue with RGB values 35, 59, 92 and HSL 215°, 45%, 25%. It is a dark colour, so white text on it reaches 11.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#233B5C#233B5C
HEX#233B5C
RGBrgb(35, 59, 92)
RGB (0–1)0.1373, 0.2314, 0.3608
RGB percentages13.7%, 23.1%, 36.1%
HSLhsl(214.7, 44.9%, 24.9%)
HSV / HSBhsv(214.7, 62%, 36.1%)
CMYK62%, 35.9%, 0%, 63.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,308,956
CSS custom property--colour: #233B5C;

Brightness & contrast

Relative luminance0.04258WCAG 2.x, 0 is black and 1 is white
Perceived brightness58.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.34:1
Contrast with white11.34:1WCAG normal text: AAA
Contrast with black1.85:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#DCC4A3

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2D3D5Dno red cones; affects about 1% of men; ΔE 2.5 from the original
Deuteranopia#26385Bno green cones; the most common form, about 1% of men; ΔE 2.7 from the original
Tritanopia#004247no blue cones; rare, and affects men and women equally; ΔE 23.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.34:1WCAG large text: AAA
Contrast with black, large text1.85:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 24.2Dim grey · ΔE 30.1Steel blue · ΔE 30.2Slate grey · ΔE 31Dark slateblue · ΔE 31.6Black · ΔE 33.3
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 24.24, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5C4423
Analogous#23585C, #27235C
Triadic#5C233B, #3B5C23
Split complementary#5C2723, #585C23
Tetradic#5C2358, #5C4423, #235C27

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7D9FCE
Lighter +30%#5884C0
Lighter +20%#3F6AA6
Lighter +10%#315381
Darker −10%#152337
Darker −20%#070C12
Darker −30%#000000
Darker −40%#000000
More saturated +25%#13386C
Less saturated −25%#333E4C

Channel breakdown

R35
G59
B92
Red35 (13.7%)
Green59 (23.1%)
Blue92 (36.1%)
Hue214.74°
Saturation (HSL)44.88%
Lightness24.9%
Dominant channelBlue
Hex per channelR 23 · G 3B · B 5C

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Every value on this page was computed from “233b5c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.