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Recognised as Colour

#3F8FCA

  • #3F8FCA
  • Blue
  • Dark
  • Nearest: Steel blue

#3F8FCA is a blue with RGB values 63, 143, 202 and HSL 205°, 57%, 52%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#3F8FCA#3F8FCA
HEX#3F8FCA
RGBrgb(63, 143, 202)
RGB (0–1)0.2471, 0.5608, 0.7922
RGB percentages24.7%, 56.1%, 79.2%
HSLhsl(205.5, 56.7%, 52%)
HSV / HSBhsv(205.5, 68.8%, 79.2%)
CMYK68.8%, 29.2%, 0%, 20.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,165,578
CSS custom property--colour: #3F8FCA;

Brightness & contrast

Relative luminance0.24966WCAG 2.x, 0 is black and 1 is white
Perceived brightness133.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.99:1
Contrast with white3.5:1WCAG normal text: Fail
Contrast with black5.99:1WCAG normal text: AA
Greyscale equivalent#828282
Inverted#C07035

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7490CDno red cones; affects about 1% of men; ΔE 12.2 from the original
Deuteranopia#6183C9no green cones; the most common form, about 1% of men; ΔE 13.7 from the original
Tritanopia#009DA4no blue cones; rare, and affects men and women equally; ΔE 35.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.5:1WCAG large text: AA
Contrast with black, large text5.99:1WCAG large text: AAA

Named colours

Steel blue · ΔE 7.2Cornflower blue · ΔE 19.4Deep skyblue · ΔE 20.4Light skyblue · ΔE 25Light slate grey · ΔE 26.7Slate grey · ΔE 27.5
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.19, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CA7A3F
Analogous#3FCAC0, #3F49CA
Triadic#CA3F8F, #8FCA3F
Split complementary#CA3F49, #CABF3F
Tetradic#C03FCA, #CA7A3F, #4ACA3F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DFECF6
Lighter +30%#B7D5EB
Lighter +20%#8FBEE0
Lighter +10%#67A6D5
Darker −10%#2E74A8
Darker −20%#235880
Darker −30%#183D58
Darker −40%#0D2130
More saturated +25%#2094E9
Less saturated −25%#5E8AAB

Channel breakdown

R63
G143
B202
Red63 (24.7%)
Green143 (56.1%)
Blue202 (79.2%)
Hue205.47°
Saturation (HSL)56.73%
Lightness51.96%
Dominant channelBlue
Hex per channelR 3F · G 8F · B CA

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Every value on this page was computed from “3f8fca” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.