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Recognised as Colour

#42668A

  • #42668A
  • Blue
  • Dark
  • Nearest: Steel blue

#42668A is a blue with RGB values 66, 102, 138 and HSL 210°, 35%, 40%. It is a dark colour, so white text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#42668A#42668A
HEX#42668A
RGBrgb(66, 102, 138)
RGB (0–1)0.2588, 0.4, 0.5412
RGB percentages25.9%, 40%, 54.1%
HSLhsl(210, 35.3%, 40%)
HSV / HSBhsv(210, 52.2%, 54.1%)
CMYK52.2%, 26.1%, 0%, 45.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,351,626
CSS custom property--colour: #42668A;

Brightness & contrast

Relative luminance0.12496WCAG 2.x, 0 is black and 1 is white
Perceived brightness97.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6:1
Contrast with white6:1WCAG normal text: AA
Contrast with black3.5:1WCAG normal text: Fail
Greyscale equivalent#616161
Inverted#BD9975

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#57678Cno red cones; affects about 1% of men; ΔE 6.2 from the original
Deuteranopia#4E6089no green cones; the most common form, about 1% of men; ΔE 6.8 from the original
Tritanopia#1E6E72no blue cones; rare, and affects men and women equally; ΔE 24.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6:1WCAG large text: AAA
Contrast with black, large text3.5:1WCAG large text: AA

Named colours

Steel blue · ΔE 13.5Slate grey · ΔE 17.1Light slate grey · ΔE 18.9Dim grey · ΔE 24.1Dark slate grey · ΔE 24.8Gray · ΔE 26.6
Nearest named CSS colourSteel blue (#4682B4)ΔE 13.55, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8A6642
Analogous#428A8A, #42428A
Triadic#8A4266, #668A42
Split complementary#8A4242, #8A8A42
Tetradic#8A428A, #8A6642, #428A42

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BACCDE
Lighter +30%#98B3CD
Lighter +20%#7599BD
Lighter +10%#5380AC
Darker −10%#324D67
Darker −20%#213345
Darker −30%#111A22
Darker −40%#000000
More saturated +25%#2966A3
Less saturated −25%#5C6671

Channel breakdown

R66
G102
B138
Red66 (25.9%)
Green102 (40%)
Blue138 (54.1%)
Hue210°
Saturation (HSL)35.29%
Lightness40%
Dominant channelBlue
Hex per channelR 42 · G 66 · B 8A

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Every value on this page was computed from “42668a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.