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Colour

#2870DD

  • #2870DD
  • Blue
  • Dark
  • Nearest: Royal blue

#2870DD is a blue with RGB values 40, 112, 221 and HSL 216°, 73%, 51%. It is a dark colour, so white text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#2870DD#2870DD
HEX#2870DD
RGBrgb(40, 112, 221)
RGB (0–1)0.1569, 0.4392, 0.8667
RGB percentages15.7%, 43.9%, 86.7%
HSLhsl(216.1, 72.7%, 51.2%)
HSV / HSBhsv(216.1, 81.9%, 86.7%)
CMYK81.9%, 49.3%, 0%, 13.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,650,333
CSS custom property--colour: #2870DD;

Brightness & contrast

Relative luminance0.1726WCAG 2.x, 0 is black and 1 is white
Perceived brightness115.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.72:1
Contrast with white4.72:1WCAG normal text: AA
Contrast with black4.45:1WCAG normal text: Fail
Greyscale equivalent#696969
Inverted#D78F22

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2C7CE1no red cones; affects about 1% of men; ΔE 7.7 from the original
Deuteranopia#006CDBno green cones; the most common form, about 1% of men; ΔE 2.6 from the original
Tritanopia#008A9Cno blue cones; rare, and affects men and women equally; ΔE 60.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.72:1WCAG large text: AAA
Contrast with black, large text4.45:1WCAG large text: AA

Named colours

Royal blue · ΔE 9.3Dodgerblue · ΔE 13.3Slate blue · ΔE 19.2Cornflower blue · ΔE 20.1Medium purple · ΔE 23.4Medium slateblue · ΔE 24
Nearest named CSS colourRoyal blue (#4169E1)ΔE 9.35, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DD9528
Analogous#28CADD, #3B28DD
Triadic#DD2870, #70DD28
Split complementary#DD3B28, #CADD28
Tetradic#DD28CA, #DD9528, #28DD3B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D8E5F9
Lighter +30%#ACC8F2
Lighter +20%#80ABEB
Lighter +10%#548DE4
Darker −10%#1D59B5
Darker −20%#164489
Darker −30%#0F2E5D
Darker −40%#081831
More saturated +25%#096AFC
Less saturated −25%#4776BE

Channel breakdown

R40
G112
B221
Red40 (15.7%)
Green112 (43.9%)
Blue221 (86.7%)
Hue216.13°
Saturation (HSL)72.69%
Lightness51.18%
Dominant channelBlue
Hex per channelR 28 · G 70 · B DD

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Every value on this page was computed from “2870dd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.