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Recognised as Colour

#237BB9

  • #237BB9
  • Blue
  • Dark
  • Nearest: Steel blue

#237BB9 is a blue with RGB values 35, 123, 185 and HSL 205°, 68%, 43%. It is a dark colour, so black text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#237BB9#237BB9
HEX#237BB9
RGBrgb(35, 123, 185)
RGB (0–1)0.1373, 0.4824, 0.7255
RGB percentages13.7%, 48.2%, 72.5%
HSLhsl(204.8, 68.2%, 43.1%)
HSV / HSBhsv(204.8, 81.1%, 72.5%)
CMYK81.1%, 33.5%, 0%, 27.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,325,433
CSS custom property--colour: #237BB9;

Brightness & contrast

Relative luminance0.18026WCAG 2.x, 0 is black and 1 is white
Perceived brightness114.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.61:1
Contrast with white4.56:1WCAG normal text: AA
Contrast with black4.61:1WCAG normal text: AA
Greyscale equivalent#6D6D6D
Inverted#DC8446

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#5E7DBCno red cones; affects about 1% of men; ΔE 11 from the original
Deuteranopia#4970B8no green cones; the most common form, about 1% of men; ΔE 12.5 from the original
Tritanopia#008A91no blue cones; rare, and affects men and women equally; ΔE 36.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.56:1WCAG large text: AAA
Contrast with black, large text4.61:1WCAG large text: AAA

Named colours

Steel blue · ΔE 8.2Cornflower blue · ΔE 20.1Deep skyblue · ΔE 27.2Dodgerblue · ΔE 28.8Light slate grey · ΔE 29.4Slate grey · ΔE 29.4
Nearest named CSS colourSteel blue (#4682B4)ΔE 8.16, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B96123
Analogous#23B9AC, #2330B9
Triadic#B9237B, #7BB923
Split complementary#B92330, #B9AC23
Tetradic#AC23B9, #B96123, #30B923

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B7D9F1
Lighter +30%#8CC3E9
Lighter +20%#61ACE1
Lighter +10%#3696D9
Darker −10%#1B5E8E
Darker −20%#134263
Darker −30%#0B2538
Darker −40%#03090D
More saturated +25%#0880D4
Less saturated −25%#3F769D

Channel breakdown

R35
G123
B185
Red35 (13.7%)
Green123 (48.2%)
Blue185 (72.5%)
Hue204.8°
Saturation (HSL)68.18%
Lightness43.14%
Dominant channelBlue
Hex per channelR 23 · G 7B · B B9

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Every value on this page was computed from “237bb9” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.