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Recognised as Colour

#636F90

  • #636F90
  • Blue
  • Dark
  • Nearest: Slate grey

#636F90 is a blue with RGB values 99, 111, 144 and HSL 224°, 19%, 48%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#636F90#636F90
HEX#636F90
RGBrgb(99, 111, 144)
RGB (0–1)0.3882, 0.4353, 0.5647
RGB percentages38.8%, 43.5%, 56.5%
HSLhsl(224, 18.5%, 47.6%)
HSV / HSBhsv(224, 31.3%, 56.5%)
CMYK31.3%, 22.9%, 0%, 43.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,516,624
CSS custom property--colour: #636F90;

Brightness & contrast

Relative luminance0.16035WCAG 2.x, 0 is black and 1 is white
Perceived brightness111.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.99:1
Contrast with white4.99:1WCAG normal text: AA
Contrast with black4.21:1WCAG normal text: Fail
Greyscale equivalent#6F6F6F
Inverted#9C906F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#657291no red cones; affects about 1% of men; ΔE 1.7 from the original
Deuteranopia#616E8Fno green cones; the most common form, about 1% of men; ΔE 0.6 from the original
Tritanopia#57757Ano blue cones; rare, and affects men and women equally; ΔE 18.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text4.99:1WCAG large text: AAA
Contrast with black, large text4.21:1WCAG large text: AA

Named colours

Slate grey · ΔE 12.1Light slate grey · ΔE 13.6Steel blue · ΔE 15.8Dim grey · ΔE 20Gray · ΔE 20.9Dark slate grey · ΔE 27.1
Nearest named CSS colourSlate grey (#708090)ΔE 12.12, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#908463
Analogous#638590, #6E6390
Triadic#90636F, #6F9063
Split complementary#906E63, #859063
Tetradic#906385, #908463, #63906E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DADDE5
Lighter +30%#BBC1D1
Lighter +20%#9DA5BC
Lighter +10%#7F8AA7
Darker −10%#4E5872
Darker −20%#394054
Darker −30%#252935
Darker −40%#101217
More saturated +25%#4561AE
Less saturated −25%#797979

Channel breakdown

R99
G111
B144
Red99 (38.8%)
Green111 (43.5%)
Blue144 (56.5%)
Hue224°
Saturation (HSL)18.52%
Lightness47.65%
Dominant channelBlue
Hex per channelR 63 · G 6F · B 90

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Every value on this page was computed from “636f90” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.