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Colour

#0A284F

  • #0A284F
  • Blue
  • Dark
  • Nearest: Dark slateblue

#0A284F is a blue with RGB values 10, 40, 79 and HSL 214°, 78%, 17%. It is a dark colour, so white text on it reaches 14.7:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#0A284F#0A284F
HEX#0A284F
RGBrgb(10, 40, 79)
RGB (0–1)0.0392, 0.1569, 0.3098
RGB percentages3.9%, 15.7%, 31%
HSLhsl(213.9, 77.5%, 17.5%)
HSV / HSBhsv(213.9, 87.3%, 31%)
CMYK87.3%, 49.4%, 0%, 69%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer665,679
CSS custom property--colour: #0A284F;

Brightness & contrast

Relative luminance0.02147WCAG 2.x, 0 is black and 1 is white
Perceived brightness41 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.69:1
Contrast with white14.69:1WCAG normal text: AAA
Contrast with black1.43:1WCAG normal text: Fail
Greyscale equivalent#242424
Inverted#F5D7B0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#142C50no red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#05254Eno green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#003137no blue cones; rare, and affects men and women equally; ΔE 26.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.69:1WCAG large text: AAA
Contrast with black, large text1.43:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 29.3Black · ΔE 32.1Dark slate grey · ΔE 32.7Midnight blue · ΔE 34.5Steel blue · ΔE 37.8Dim grey · ΔE 39.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 29.29, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4F310A
Analogous#0A4A4F, #0E0A4F
Triadic#4F0A28, #284F0A
Split complementary#4F0E0A, #4A4F0A
Tetradic#4F0A4B, #4F310A, #0A4F0F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#3E88E7
Lighter +30%#1B6DD7
Lighter +20%#1556AA
Lighter +10%#103F7C
Darker −10%#041122
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#002759
Less saturated −25%#152944

Channel breakdown

R10
G40
B79
Red10 (3.9%)
Green40 (15.7%)
Blue79 (31%)
Hue213.91°
Saturation (HSL)77.53%
Lightness17.45%
Dominant channelBlue
Hex per channelR 0A · G 28 · B 4F

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Every value on this page was computed from “0a284f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.