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Recognised as Colour

#2663A4

  • #2663A4
  • Blue
  • Dark
  • Nearest: Steel blue

#2663A4 is a blue with RGB values 38, 99, 164 and HSL 211°, 62%, 40%. It is a dark colour, so white text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#2663A4#2663A4
HEX#2663A4
RGBrgb(38, 99, 164)
RGB (0–1)0.149, 0.3882, 0.6431
RGB percentages14.9%, 38.8%, 64.3%
HSLhsl(211, 62.4%, 39.6%)
HSV / HSBhsv(211, 76.8%, 64.3%)
CMYK76.8%, 39.6%, 0%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,515,876
CSS custom property--colour: #2663A4;

Brightness & contrast

Relative luminance0.12016WCAG 2.x, 0 is black and 1 is white
Perceived brightness96.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.17:1
Contrast with white6.17:1WCAG normal text: AA
Contrast with black3.4:1WCAG normal text: Fail
Greyscale equivalent#5B5B5B
Inverted#D99C5B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4468A7no red cones; affects about 1% of men; ΔE 5.1 from the original
Deuteranopia#305CA3no green cones; the most common form, about 1% of men; ΔE 6.2 from the original
Tritanopia#00727Bno blue cones; rare, and affects men and women equally; ΔE 39.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.17:1WCAG large text: AAA
Contrast with black, large text3.4:1WCAG large text: AA

Named colours

Steel blue · ΔE 16.1Cornflower blue · ΔE 23.1Dark slateblue · ΔE 24.6Dodgerblue · ΔE 29.7Slate grey · ΔE 32.8Light slate grey · ΔE 33.5
Nearest named CSS colourSteel blue (#4682B4)ΔE 16.12, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A46726
Analogous#26A2A4, #2826A4
Triadic#A42663, #63A426
Split complementary#A42826, #A2A426
Tetradic#A426A2, #A46726, #26A428

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ABCAEB
Lighter +30%#81B0E2
Lighter +20%#5896D8
Lighter +10%#307CCD
Darker −10%#1C4A7B
Darker −20%#133151
Darker −30%#091828
Darker −40%#000000
More saturated +25%#0D62BD
Less saturated −25%#3F648B

Channel breakdown

R38
G99
B164
Red38 (14.9%)
Green99 (38.8%)
Blue164 (64.3%)
Hue210.95°
Saturation (HSL)62.38%
Lightness39.61%
Dominant channelBlue
Hex per channelR 26 · G 63 · B A4

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Every value on this page was computed from “2663a4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.