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Recognised as Colour

#357DB3

  • #357DB3
  • Blue
  • Dark
  • Nearest: Steel blue

#357DB3 is a blue with RGB values 53, 125, 179 and HSL 206°, 54%, 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

#357DB3#357DB3
HEX#357DB3
RGBrgb(53, 125, 179)
RGB (0–1)0.2078, 0.4902, 0.702
RGB percentages20.8%, 49%, 70.2%
HSLhsl(205.7, 54.3%, 45.5%)
HSV / HSBhsv(205.7, 70.4%, 70.2%)
CMYK70.4%, 30.2%, 0%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,505,587
CSS custom property--colour: #357DB3;

Brightness & contrast

Relative luminance0.18679WCAG 2.x, 0 is black and 1 is white
Perceived brightness116.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.74:1
Contrast with white4.43:1WCAG normal text: Fail
Contrast with black4.74:1WCAG normal text: AA
Greyscale equivalent#727272
Inverted#CA824C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#657EB5no red cones; affects about 1% of men; ΔE 11 from the original
Deuteranopia#5372B2no green cones; the most common form, about 1% of men; ΔE 12.5 from the original
Tritanopia#008A90no blue cones; rare, and affects men and women equally; ΔE 33.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.43:1WCAG large text: AA
Contrast with black, large text4.74:1WCAG large text: AAA

Named colours

Steel blue · ΔE 3.6Cornflower blue · ΔE 23Light slate grey · ΔE 24.7Slate grey · ΔE 24.7Deep skyblue · ΔE 26.9Light skyblue · ΔE 30.8
Nearest named CSS colourSteel blue (#4682B4)ΔE 3.59, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B36B35
Analogous#35B3AA, #353EB3
Triadic#B3357D, #7DB335
Split complementary#B3353E, #B3AA35
Tetradic#AA35B3, #B36B35, #3EB335

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C6DDEE
Lighter +30%#9FC5E2
Lighter +20%#77AED7
Lighter +10%#5096CB
Darker −10%#29628C
Darker −20%#1E4664
Darker −30%#122B3D
Darker −40%#060F16
More saturated +25%#1881D0
Less saturated −25%#527996

Channel breakdown

R53
G125
B179
Red53 (20.8%)
Green125 (49%)
Blue179 (70.2%)
Hue205.71°
Saturation (HSL)54.31%
Lightness45.49%
Dominant channelBlue
Hex per channelR 35 · G 7D · B B3

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Every value on this page was computed from “357db3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.