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Recognised as Colour

#63687F

  • #63687F
  • Blue
  • Dark
  • Nearest: Slate grey

#63687F is a blue with RGB values 99, 104, 127 and HSL 229°, 12%, 44%. It is a dark colour, so white text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#63687F#63687F
HEX#63687F
RGBrgb(99, 104, 127)
RGB (0–1)0.3882, 0.4078, 0.498
RGB percentages38.8%, 40.8%, 49.8%
HSLhsl(229.3, 12.4%, 44.3%)
HSV / HSBhsv(229.3, 22%, 49.8%)
CMYK22%, 18.1%, 0%, 50.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,514,815
CSS custom property--colour: #63687F;

Brightness & contrast

Relative luminance0.14086WCAG 2.x, 0 is black and 1 is white
Perceived brightness105.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.5:1
Contrast with white5.5:1WCAG normal text: AA
Contrast with black3.82:1WCAG normal text: Fail
Greyscale equivalent#696969
Inverted#9C9780

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#626A80no red cones; affects about 1% of men; ΔE 1.4 from the original
Deuteranopia#60687Eno green cones; the most common form, about 1% of men; ΔE 1.3 from the original
Tritanopia#5C6C70no blue cones; rare, and affects men and women equally; ΔE 12.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text5.5:1WCAG large text: AAA
Contrast with black, large text3.82:1WCAG large text: AA

Named colours

Slate grey · ΔE 10.5Light slate grey · ΔE 13.1Dim grey · ΔE 13.8Gray · ΔE 16.6Steel blue · ΔE 21.8Dark slate grey · ΔE 22.3
Nearest named CSS colourSlate grey (#708090)ΔE 10.54, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7F7A63
Analogous#63767F, #6C637F
Triadic#7F6368, #687F63
Split complementary#7F6C63, #767F63
Tetradic#7F6376, #7F7A63, #637F6C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D2D4DC
Lighter +30%#B5B8C6
Lighter +20%#999DAF
Lighter +10%#7C8199
Darker −10%#4D5162
Darker −20%#363946
Darker −30%#202229
Darker −40%#0A0A0C
More saturated +25%#47569B
Less saturated −25%#717171

Channel breakdown

R99
G104
B127
Red99 (38.8%)
Green104 (40.8%)
Blue127 (49.8%)
Hue229.29°
Saturation (HSL)12.39%
Lightness44.31%
Dominant channelBlue
Hex per channelR 63 · G 68 · B 7F

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Every value on this page was computed from “63687f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.