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Recognised as Colour

#287DB2

  • #287DB2
  • Blue
  • Dark
  • Nearest: Steel blue

#287DB2 is a blue with RGB values 40, 125, 178 and HSL 203°, 63%, 43%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#287DB2#287DB2
HEX#287DB2
RGBrgb(40, 125, 178)
RGB (0–1)0.1569, 0.4902, 0.698
RGB percentages15.7%, 49%, 69.8%
HSLhsl(203, 63.3%, 42.7%)
HSV / HSBhsv(203, 77.5%, 69.8%)
CMYK77.5%, 29.8%, 0%, 30.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,653,618
CSS custom property--colour: #287DB2;

Brightness & contrast

Relative luminance0.18333WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.67:1
Contrast with white4.5:1WCAG normal text: AA
Contrast with black4.67:1WCAG normal text: AA
Greyscale equivalent#6F6F6F
Inverted#D7824D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#647EB4no red cones; affects about 1% of men; ΔE 12.7 from the original
Deuteranopia#5171B1no green cones; the most common form, about 1% of men; ΔE 14.4 from the original
Tritanopia#008A90no blue cones; rare, and affects men and women equally; ΔE 31.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.5:1WCAG large text: AAA
Contrast with black, large text4.67:1WCAG large text: AAA

Named colours

Steel blue · ΔE 4.6Cornflower blue · ΔE 24.5Slate grey · ΔE 25.1Light slate grey · ΔE 25.1Deep skyblue · ΔE 26.3Light skyblue · ΔE 30.9
Nearest named CSS colourSteel blue (#4682B4)ΔE 4.64, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B25D28
Analogous#28B2A2, #2838B2
Triadic#B2287D, #7DB228
Split complementary#B22838, #B2A228
Tetradic#A228B2, #B25D28, #38B228

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B7D9EF
Lighter +30%#8EC4E5
Lighter +20%#64AEDC
Lighter +10%#3A98D3
Darker −10%#1F6088
Darker −20%#15435F
Darker −30%#0C2535
Darker −40%#03080B
More saturated +25%#0D83CD
Less saturated −25%#437797

Channel breakdown

R40
G125
B178
Red40 (15.7%)
Green125 (49%)
Blue178 (69.8%)
Hue203.04°
Saturation (HSL)63.3%
Lightness42.75%
Dominant channelBlue
Hex per channelR 28 · G 7D · B B2

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Every value on this page was computed from “287db2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.