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Recognised as Colour

#288AF4

  • #288AF4
  • Blue
  • Dark
  • Nearest: Dodgerblue

#288AF4 is a blue with RGB values 40, 138, 244 and HSL 211°, 90%, 56%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Dodgerblue.

Colour values

#288AF4#288AF4
HEX#288AF4
RGBrgb(40, 138, 244)
RGB (0–1)0.1569, 0.5412, 0.9569
RGB percentages15.7%, 54.1%, 95.7%
HSLhsl(211.2, 90.3%, 55.7%)
HSV / HSBhsv(211.2, 83.6%, 95.7%)
CMYK83.6%, 43.4%, 0%, 4.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,657,012
CSS custom property--colour: #288AF4;

Brightness & contrast

Relative luminance0.2516WCAG 2.x, 0 is black and 1 is white
Perceived brightness135.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.03:1
Contrast with white3.48:1WCAG normal text: Fail
Contrast with black6.03:1WCAG normal text: AA
Greyscale equivalent#7D7D7D
Inverted#D7750B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5293F8no red cones; affects about 1% of men; ΔE 5.8 from the original
Deuteranopia#2781F2no green cones; the most common form, about 1% of men; ΔE 6.2 from the original
Tritanopia#00A3B3no blue cones; rare, and affects men and women equally; ΔE 58.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.48:1WCAG large text: AA
Contrast with black, large text6.03:1WCAG large text: AAA

Named colours

Dodgerblue · ΔE 3.4Cornflower blue · ΔE 12.4Royal blue · ΔE 19.2Slate blue · ΔE 28.7Medium purple · ΔE 28.8Medium slateblue · ΔE 31.7
Nearest named CSS colourDodgerblue (#1E90FF)ΔE 3.39, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#F49228
Analogous#28F0F4, #2C28F4
Triadic#F4288A, #8AF428
Split complementary#F42C28, #F0F428
Tetradic#F428F0, #F49228, #28F42C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EAF4FE
Lighter +30%#BAD9FB
Lighter +20%#89BFF9
Lighter +10%#59A4F6
Darker −10%#0B70DE
Darker −20%#0958AD
Darker −30%#063F7D
Darker −40%#04274C
More saturated +25%#1D8AFF
Less saturated −25%#448BD8

Channel breakdown

R40
G138
B244
Red40 (15.7%)
Green138 (54.1%)
Blue244 (95.7%)
Hue211.18°
Saturation (HSL)90.27%
Lightness55.69%
Dominant channelBlue
Hex per channelR 28 · G 8A · B F4

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Every value on this page was computed from “288af4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.