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Recognised as Colour

#305A89

  • #305A89
  • Blue
  • Dark
  • Nearest: Steel blue

#305A89 is a blue with RGB values 48, 90, 137 and HSL 212°, 48%, 36%. It is a dark colour, so white text on it reaches 7.1:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#305A89#305A89
HEX#305A89
RGBrgb(48, 90, 137)
RGB (0–1)0.1882, 0.3529, 0.5373
RGB percentages18.8%, 35.3%, 53.7%
HSLhsl(211.7, 48.1%, 36.3%)
HSV / HSBhsv(211.7, 65%, 53.7%)
CMYK65%, 34.3%, 0%, 46.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,168,905
CSS custom property--colour: #305A89;

Brightness & contrast

Relative luminance0.09747WCAG 2.x, 0 is black and 1 is white
Perceived brightness87.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.12:1
Contrast with white7.12:1WCAG normal text: AAA
Contrast with black2.95:1WCAG normal text: Fail
Greyscale equivalent#545454
Inverted#CFA576

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#465D8Bno red cones; affects about 1% of men; ΔE 5 from the original
Deuteranopia#3A5488no green cones; the most common form, about 1% of men; ΔE 6 from the original
Tritanopia#00656Bno blue cones; rare, and affects men and women equally; ΔE 30.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.12:1WCAG large text: AAA
Contrast with black, large text2.95:1WCAG large text: Fail

Named colours

Steel blue · ΔE 16Slate grey · ΔE 25.4Light slate grey · ΔE 27Dark slateblue · ΔE 28.3Dark slate grey · ΔE 30.3Dim grey · ΔE 31.3
Nearest named CSS colourSteel blue (#4682B4)ΔE 16.01, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#895F30
Analogous#308689, #333089
Triadic#89305A, #5A8930
Split complementary#893330, #868930
Tetradic#893086, #895F30, #308933

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A5C1E0
Lighter +30%#80A7D2
Lighter +20%#5A8CC5
Lighter +10%#3D73AF
Darker −10%#234163
Darker −20%#16283D
Darker −30%#081018
Darker −40%#000000
More saturated +25%#1959A0
Less saturated −25%#475B72

Channel breakdown

R48
G90
B137
Red48 (18.8%)
Green90 (35.3%)
Blue137 (53.7%)
Hue211.69°
Saturation (HSL)48.11%
Lightness36.27%
Dominant channelBlue
Hex per channelR 30 · G 5A · B 89

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Every value on this page was computed from “305a89” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.