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Recognised as Colour

#305C90

  • #305C90
  • Blue
  • Dark
  • Nearest: Steel blue

#305C90 is a blue with RGB values 48, 92, 144 and HSL 213°, 50%, 38%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#305C90#305C90
HEX#305C90
RGBrgb(48, 92, 144)
RGB (0–1)0.1882, 0.3608, 0.5647
RGB percentages18.8%, 36.1%, 56.5%
HSLhsl(212.5, 50%, 37.6%)
HSV / HSBhsv(212.5, 66.7%, 56.5%)
CMYK66.7%, 36.1%, 0%, 43.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,169,424
CSS custom property--colour: #305C90;

Brightness & contrast

Relative luminance0.10296WCAG 2.x, 0 is black and 1 is white
Perceived brightness89.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.86:1
Contrast with white6.86:1WCAG normal text: AA
Contrast with black3.06:1WCAG normal text: Fail
Greyscale equivalent#565656
Inverted#CFA36F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#455F92no red cones; affects about 1% of men; ΔE 4.5 from the original
Deuteranopia#38568Fno green cones; the most common form, about 1% of men; ΔE 5.6 from the original
Tritanopia#00686Fno blue cones; rare, and affects men and women equally; ΔE 33.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.86:1WCAG large text: AAA
Contrast with black, large text3.06:1WCAG large text: AA

Named colours

Steel blue · ΔE 15.5Dark slateblue · ΔE 26.4Slate grey · ΔE 27.2Light slate grey · ΔE 28.6Cornflower blue · ΔE 29.4Dark slate grey · ΔE 33.4
Nearest named CSS colourSteel blue (#4682B4)ΔE 15.51, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#906430
Analogous#308C90, #343090
Triadic#90305C, #5C9030
Split complementary#903430, #8C9030
Tetradic#90308C, #906430, #309034

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AAC4E3
Lighter +30%#83A9D6
Lighter +20%#5D8FC9
Lighter +10%#3D74B6
Darker −10%#23446A
Darker −20%#162B44
Darker −30%#0A131D
Darker −40%#000000
More saturated +25%#185AA8
Less saturated −25%#485E78

Channel breakdown

R48
G92
B144
Red48 (18.8%)
Green92 (36.1%)
Blue144 (56.5%)
Hue212.5°
Saturation (HSL)50%
Lightness37.65%
Dominant channelBlue
Hex per channelR 30 · G 5C · B 90

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Every value on this page was computed from “305c90” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.