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Recognised as Colour

#307CB7

  • #307CB7
  • Blue
  • Dark
  • Nearest: Steel blue

#307CB7 is a blue with RGB values 48, 124, 183 and HSL 206°, 58%, 45%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#307CB7#307CB7
HEX#307CB7
RGBrgb(48, 124, 183)
RGB (0–1)0.1882, 0.4863, 0.7176
RGB percentages18.8%, 48.6%, 71.8%
HSLhsl(206.2, 58.4%, 45.3%)
HSV / HSBhsv(206.2, 73.8%, 71.8%)
CMYK73.8%, 32.2%, 0%, 28.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,177,655
CSS custom property--colour: #307CB7;

Brightness & contrast

Relative luminance0.18463WCAG 2.x, 0 is black and 1 is white
Perceived brightness116.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.69:1
Contrast with white4.48:1WCAG normal text: Fail
Contrast with black4.69:1WCAG normal text: AA
Greyscale equivalent#707070
Inverted#CF8348

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#617EBAno red cones; affects about 1% of men; ΔE 10.3 from the original
Deuteranopia#4E71B6no green cones; the most common form, about 1% of men; ΔE 12.1 from the original
Tritanopia#008A91no blue cones; rare, and affects men and women equally; ΔE 35.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.48:1WCAG large text: AA
Contrast with black, large text4.69:1WCAG large text: AAA

Named colours

Steel blue · ΔE 6.1Cornflower blue · ΔE 20.7Deep skyblue · ΔE 27.2Light slate grey · ΔE 27.3Slate grey · ΔE 27.4Dodgerblue · ΔE 30.3
Nearest named CSS colourSteel blue (#4682B4)ΔE 6.14, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B76B30
Analogous#30B7AE, #3039B7
Triadic#B7307C, #7CB730
Split complementary#B73039, #B7AF30
Tetradic#AE30B7, #B76B30, #38B730

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C4DCEF
Lighter +30%#9BC5E5
Lighter +20%#73ADDA
Lighter +10%#4A95D0
Darker −10%#25618F
Darker −20%#1B4566
Darker −30%#102A3E
Darker −40%#060E15
More saturated +25%#1380D4
Less saturated −25%#4D789A

Channel breakdown

R48
G124
B183
Red48 (18.8%)
Green124 (48.6%)
Blue183 (71.8%)
Hue206.22°
Saturation (HSL)58.44%
Lightness45.29%
Dominant channelBlue
Hex per channelR 30 · G 7C · B B7

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Every value on this page was computed from “307cb7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.