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Colour

#30578A

  • #30578A
  • Blue
  • Dark
  • Nearest: Steel blue

#30578A is a blue with RGB values 48, 87, 138 and HSL 214°, 48%, 36%. It is a dark colour, so white text on it reaches 7.4:1 contrast (AAA for normal text). The nearest named colour is Steel blue.

Colour values

#30578A#30578A
HEX#30578A
RGBrgb(48, 87, 138)
RGB (0–1)0.1882, 0.3412, 0.5412
RGB percentages18.8%, 34.1%, 54.1%
HSLhsl(214, 48.4%, 36.5%)
HSV / HSBhsv(214, 65.2%, 54.1%)
CMYK65.2%, 37%, 0%, 45.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,168,138
CSS custom property--colour: #30578A;

Brightness & contrast

Relative luminance0.0928WCAG 2.x, 0 is black and 1 is white
Perceived brightness85.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.35:1
Contrast with white7.35:1WCAG normal text: AAA
Contrast with black2.86:1WCAG normal text: Fail
Greyscale equivalent#525252
Inverted#CFA875

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#415B8Cno red cones; affects about 1% of men; ΔE 3.7 from the original
Deuteranopia#345289no green cones; the most common form, about 1% of men; ΔE 4.2 from the original
Tritanopia#00636Ano blue cones; rare, and affects men and women equally; ΔE 32.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.35:1WCAG large text: AAA
Contrast with black, large text2.86:1WCAG large text: Fail

Named colours

Steel blue · ΔE 17.6Dark slateblue · ΔE 25.3Slate grey · ΔE 27.9Light slate grey · ΔE 29.4Cornflower blue · ΔE 31.1Dark slate grey · ΔE 32.9
Nearest named CSS colourSteel blue (#4682B4)ΔE 17.58, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8A6330
Analogous#30848A, #36308A
Triadic#8A3057, #578A30
Split complementary#8A3630, #848A30
Tetradic#8A3084, #8A6330, #308A36

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A6BFE0
Lighter +30%#80A4D3
Lighter +20%#5A89C6
Lighter +10%#3D6FB0
Darker −10%#233F64
Darker −20%#16273E
Darker −30%#090F18
Darker −40%#000000
More saturated +25%#1954A1
Less saturated −25%#475A73

Channel breakdown

R48
G87
B138
Red48 (18.8%)
Green87 (34.1%)
Blue138 (54.1%)
Hue214°
Saturation (HSL)48.39%
Lightness36.47%
Dominant channelBlue
Hex per channelR 30 · G 57 · B 8A

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Every value on this page was computed from “30578a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.