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Recognised as Colour

#237BD1

  • #237BD1
  • Blue
  • Dark
  • Nearest: Cornflower blue

#237BD1 is a blue with RGB values 35, 123, 209 and HSL 210°, 71%, 48%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#237BD1#237BD1
HEX#237BD1
RGBrgb(35, 123, 209)
RGB (0–1)0.1373, 0.4824, 0.8196
RGB percentages13.7%, 48.2%, 82%
HSLhsl(209.7, 71.3%, 47.8%)
HSV / HSBhsv(209.7, 83.3%, 82%)
CMYK83.3%, 41.1%, 0%, 18%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,325,457
CSS custom property--colour: #237BD1;

Brightness & contrast

Relative luminance0.19127WCAG 2.x, 0 is black and 1 is white
Perceived brightness119.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.83:1
Contrast with white4.35:1WCAG normal text: Fail
Contrast with black4.83:1WCAG normal text: AA
Greyscale equivalent#6F6F6F
Inverted#DC842E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5081D4no red cones; affects about 1% of men; ΔE 6.1 from the original
Deuteranopia#3172CFno green cones; the most common form, about 1% of men; ΔE 7.2 from the original
Tritanopia#00909Cno blue cones; rare, and affects men and women equally; ΔE 49 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.35:1WCAG large text: AA
Contrast with black, large text4.83:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.9Dodgerblue · ΔE 15.3Steel blue · ΔE 21.6Royal blue · ΔE 25Dark slateblue · ΔE 30Medium purple · ΔE 31.4
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.86, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D17923
Analogous#23D1D0, #2324D1
Triadic#D1237B, #7BD123
Split complementary#D12324, #D1D023
Tetradic#D023D1, #D17923, #24D123

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CAE0F6
Lighter +30%#9EC7EF
Lighter +20%#73AEE7
Lighter +10%#4794E0
Darker −10%#1C61A5
Darker −20%#14487A
Darker −30%#0D2E4E
Darker −40%#061422
More saturated +25%#047BEF
Less saturated −25%#417BB3

Channel breakdown

R35
G123
B209
Red35 (13.7%)
Green123 (48.2%)
Blue209 (82%)
Hue209.66°
Saturation (HSL)71.31%
Lightness47.84%
Dominant channelBlue
Hex per channelR 23 · G 7B · B D1

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Every value on this page was computed from “237bd1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.