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Recognised as Colour

#427FB1

  • #427FB1
  • Blue
  • Dark
  • Nearest: Steel blue

#427FB1 is a blue with RGB values 66, 127, 177 and HSL 207°, 46%, 48%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#427FB1#427FB1
HEX#427FB1
RGBrgb(66, 127, 177)
RGB (0–1)0.2588, 0.498, 0.6941
RGB percentages25.9%, 49.8%, 69.4%
HSLhsl(207, 45.7%, 47.6%)
HSV / HSBhsv(207, 62.7%, 69.4%)
CMYK62.7%, 28.2%, 0%, 30.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,358,065
CSS custom property--colour: #427FB1;

Brightness & contrast

Relative luminance0.19511WCAG 2.x, 0 is black and 1 is white
Perceived brightness119.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.9:1
Contrast with white4.28:1WCAG normal text: Fail
Contrast with black4.9:1WCAG normal text: AA
Greyscale equivalent#767676
Inverted#BD804E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6980B3no red cones; affects about 1% of men; ΔE 9.9 from the original
Deuteranopia#5A75B0no green cones; the most common form, about 1% of men; ΔE 11.3 from the original
Tritanopia#008B90no blue cones; rare, and affects men and women equally; ΔE 32.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.28:1WCAG large text: AA
Contrast with black, large text4.9:1WCAG large text: AAA

Named colours

Steel blue · ΔE 1.2Light slate grey · ΔE 21.8Slate grey · ΔE 21.9Cornflower blue · ΔE 24.1Deep skyblue · ΔE 27.2Light skyblue · ΔE 29.5
Nearest named CSS colourSteel blue (#4682B4)ΔE 1.2, below the just-noticeable difference
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B17442
Analogous#42B1AC, #4247B1
Triadic#B1427F, #7FB142
Split complementary#B14247, #B1AB42
Tetradic#AC42B1, #B17442, #47B142

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D1E1EE
Lighter +30%#ACC9E0
Lighter +20%#87B0D2
Lighter +10%#6298C4
Darker −10%#34648C
Darker −20%#264A67
Darker −30%#182F42
Darker −40%#0B141C
More saturated +25%#2482CF
Less saturated −25%#607C93

Channel breakdown

R66
G127
B177
Red66 (25.9%)
Green127 (49.8%)
Blue177 (69.4%)
Hue207.03°
Saturation (HSL)45.68%
Lightness47.65%
Dominant channelBlue
Hex per channelR 42 · G 7F · B B1

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Every value on this page was computed from “427fb1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.