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Recognised as Colour

#153A6B

  • #153A6B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#153A6B is a blue with RGB values 21, 58, 107 and HSL 214°, 67%, 25%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#153A6B#153A6B
HEX#153A6B
RGBrgb(21, 58, 107)
RGB (0–1)0.0824, 0.2275, 0.4196
RGB percentages8.2%, 22.7%, 42%
HSLhsl(214.2, 67.2%, 25.1%)
HSV / HSBhsv(214.2, 80.4%, 42%)
CMYK80.4%, 45.8%, 0%, 58%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,391,211
CSS custom property--colour: #153A6B;

Brightness & contrast

Relative luminance0.04247WCAG 2.x, 0 is black and 1 is white
Perceived brightness58.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.35:1
Contrast with white11.35:1WCAG normal text: AAA
Contrast with black1.85:1WCAG normal text: Fail
Greyscale equivalent#363636
Inverted#EAC594

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#213E6Dno red cones; affects about 1% of men; ΔE 2.6 from the original
Deuteranopia#11366Ano green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#00464Dno blue cones; rare, and affects men and women equally; ΔE 31.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.35:1WCAG large text: AAA
Contrast with black, large text1.85:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 23.1Steel blue · ΔE 29.8Midnight blue · ΔE 32Dark slate grey · ΔE 34.4Slate grey · ΔE 36.7Dim grey · ΔE 38.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 23.09, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6B4615
Analogous#15656B, #1B156B
Triadic#6B153A, #3A6B15
Split complementary#6B1B15, #656B15
Tetradic#6B1565, #6B4615, #156B1B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6A9EE2
Lighter +30%#4082D9
Lighter +20%#2668C0
Lighter +10%#1D5196
Darker −10%#0D2340
Darker −20%#040C16
Darker −30%#000000
Darker −40%#000000
More saturated +25%#05387B
Less saturated −25%#253C5B

Channel breakdown

R21
G58
B107
Red21 (8.2%)
Green58 (22.7%)
Blue107 (42%)
Hue214.19°
Saturation (HSL)67.19%
Lightness25.1%
Dominant channelBlue
Hex per channelR 15 · G 3A · B 6B

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Every value on this page was computed from “153a6b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.