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Recognised as Colour

#287CD7

  • #287CD7
  • Blue
  • Dark
  • Nearest: Cornflower blue

#287CD7 is a blue with RGB values 40, 124, 215 and HSL 211°, 69%, 50%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#287CD7#287CD7
HEX#287CD7
RGBrgb(40, 124, 215)
RGB (0–1)0.1569, 0.4863, 0.8431
RGB percentages15.7%, 48.6%, 84.3%
HSLhsl(211.2, 68.6%, 50%)
HSV / HSBhsv(211.2, 81.4%, 84.3%)
CMYK81.4%, 42.3%, 0%, 15.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,653,399
CSS custom property--colour: #287CD7;

Brightness & contrast

Relative luminance0.19773WCAG 2.x, 0 is black and 1 is white
Perceived brightness121.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.95:1
Contrast with white4.24:1WCAG normal text: Fail
Contrast with black4.95:1WCAG normal text: AA
Greyscale equivalent#717171
Inverted#D78328

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4E83DBno red cones; affects about 1% of men; ΔE 5.3 from the original
Deuteranopia#2D74D5no green cones; the most common form, about 1% of men; ΔE 5.8 from the original
Tritanopia#00929Fno blue cones; rare, and affects men and women equally; ΔE 51.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.24:1WCAG large text: AA
Contrast with black, large text4.95:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.3Dodgerblue · ΔE 12.7Royal blue · ΔE 22.1Steel blue · ΔE 24.5Slate blue · ΔE 29.2Medium purple · ΔE 29.4
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.32, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D78328
Analogous#28D3D7, #2C28D7
Triadic#D7287C, #7CD728
Split complementary#D72B28, #D4D728
Tetradic#D728D3, #D78328, #28D72C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D4E5F7
Lighter +30%#A9CBEF
Lighter +20%#7EB0E7
Lighter +10%#5396DF
Darker −10%#2063AC
Darker −20%#184A81
Darker −30%#103256
Darker −40%#08192B
More saturated +25%#087BF7
Less saturated −25%#487DB7

Channel breakdown

R40
G124
B215
Red40 (15.7%)
Green124 (48.6%)
Blue215 (84.3%)
Hue211.2°
Saturation (HSL)68.63%
Lightness50%
Dominant channelBlue
Hex per channelR 28 · G 7C · B D7

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Every value on this page was computed from “287cd7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.