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Recognised as Colour

#287BD8

  • #287BD8
  • Blue
  • Dark
  • Nearest: Cornflower blue

#287BD8 is a blue with RGB values 40, 123, 216 and HSL 212°, 69%, 50%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#287BD8#287BD8
HEX#287BD8
RGBrgb(40, 123, 216)
RGB (0–1)0.1569, 0.4824, 0.8471
RGB percentages15.7%, 48.2%, 84.7%
HSLhsl(211.7, 69.3%, 50.2%)
HSV / HSBhsv(211.7, 81.5%, 84.7%)
CMYK81.5%, 43.1%, 0%, 15.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,653,144
CSS custom property--colour: #287BD8;

Brightness & contrast

Relative luminance0.19575WCAG 2.x, 0 is black and 1 is white
Perceived brightness121.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.91:1
Contrast with white4.27:1WCAG normal text: Fail
Contrast with black4.91:1WCAG normal text: AA
Greyscale equivalent#707070
Inverted#D78427

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4B83DCno red cones; affects about 1% of men; ΔE 5.2 from the original
Deuteranopia#2973D6no green cones; the most common form, about 1% of men; ΔE 5.6 from the original
Tritanopia#00919Fno blue cones; rare, and affects men and women equally; ΔE 52.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.27:1WCAG large text: AA
Contrast with black, large text4.91:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.8Dodgerblue · ΔE 12Royal blue · ΔE 20.8Steel blue · ΔE 25.8Slate blue · ΔE 28.1Medium purple · ΔE 28.6
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.82, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D88528
Analogous#28D3D8, #2D28D8
Triadic#D8287B, #7BD828
Split complementary#D82D28, #D3D828
Tetradic#D828D3, #D88528, #28D82D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D5E5F7
Lighter +30%#AACBEF
Lighter +20%#7EB0E8
Lighter +10%#5396E0
Darker −10%#1F62AE
Darker −20%#184A82
Darker −30%#103157
Darker −40%#08192C
More saturated +25%#0879F8
Less saturated −25%#487DB8

Channel breakdown

R40
G123
B216
Red40 (15.7%)
Green123 (48.2%)
Blue216 (84.7%)
Hue211.7°
Saturation (HSL)69.29%
Lightness50.2%
Dominant channelBlue
Hex per channelR 28 · G 7B · B D8

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Every value on this page was computed from “287bd8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.