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Recognised as Colour

#28739B

  • #28739B
  • Blue
  • Dark
  • Nearest: Steel blue

#28739B is a blue with RGB values 40, 115, 155 and HSL 201°, 59%, 38%. It is a dark colour, so white text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#28739B#28739B
HEX#28739B
RGBrgb(40, 115, 155)
RGB (0–1)0.1569, 0.451, 0.6078
RGB percentages15.7%, 45.1%, 60.8%
HSLhsl(200.9, 59%, 38.2%)
HSV / HSBhsv(200.9, 74.2%, 60.8%)
CMYK74.2%, 25.8%, 0%, 39.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,651,035
CSS custom property--colour: #28739B;

Brightness & contrast

Relative luminance0.15079WCAG 2.x, 0 is black and 1 is white
Perceived brightness104.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.23:1
Contrast with white5.23:1WCAG normal text: AA
Contrast with black4.02:1WCAG normal text: Fail
Greyscale equivalent#666666
Inverted#D78C64

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#60729Dno red cones; affects about 1% of men; ΔE 14.1 from the original
Deuteranopia#50679Ano green cones; the most common form, about 1% of men; ΔE 15.3 from the original
Tritanopia#007D81no blue cones; rare, and affects men and women equally; ΔE 25.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.23:1WCAG large text: AAA
Contrast with black, large text4.02:1WCAG large text: AA

Named colours

Steel blue · ΔE 9.3Slate grey · ΔE 20.2Light slate grey · ΔE 21Cadetblue · ΔE 28Teal · ΔE 28.1Dark slate grey · ΔE 28.6
Nearest named CSS colourSteel blue (#4682B4)ΔE 9.26, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9B5028
Analogous#289B89, #283A9B
Triadic#9B2873, #739B28
Split complementary#9B283A, #9B8928
Tetradic#89289B, #9B5028, #3A9B28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A7D1E8
Lighter +30%#7EBDDE
Lighter +20%#56A8D3
Lighter +10%#3291C4
Darker −10%#1E5572
Darker −20%#13374A
Darker −30%#091921
Darker −40%#000000
More saturated +25%#107AB3
Less saturated −25%#406C83

Channel breakdown

R40
G115
B155
Red40 (15.7%)
Green115 (45.1%)
Blue155 (60.8%)
Hue200.87°
Saturation (HSL)58.97%
Lightness38.24%
Dominant channelBlue
Hex per channelR 28 · G 73 · B 9B

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Every value on this page was computed from “28739b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.