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Colour

#153B58

  • #153B58
  • Blue
  • Dark
  • Nearest: Dark slate grey

#153B58 is a blue with RGB values 21, 59, 88 and HSL 206°, 61%, 21%. It is a dark colour, so white text on it reaches 11.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#153B58#153B58
HEX#153B58
RGBrgb(21, 59, 88)
RGB (0–1)0.0824, 0.2314, 0.3451
RGB percentages8.2%, 23.1%, 34.5%
HSLhsl(206, 61.5%, 21.4%)
HSV / HSBhsv(206, 76.1%, 34.5%)
CMYK76.1%, 33%, 0%, 65.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,391,448
CSS custom property--colour: #153B58;

Brightness & contrast

Relative luminance0.03992WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.68:1
Contrast with white11.68:1WCAG normal text: AAA
Contrast with black1.8:1WCAG normal text: Fail
Greyscale equivalent#353535
Inverted#EAC4A7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2E3C59no red cones; affects about 1% of men; ΔE 6.3 from the original
Deuteranopia#253557no green cones; the most common form, about 1% of men; ΔE 7.4 from the original
Tritanopia#004245no blue cones; rare, and affects men and women equally; ΔE 20.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.68:1WCAG large text: AAA
Contrast with black, large text1.8:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 21.3Dim grey · ΔE 29.9Steel blue · ΔE 30.9Slate grey · ΔE 31.1Black · ΔE 31.9Light slate grey · ΔE 33.8
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 21.29, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#583215
Analogous#155853, #151A58
Triadic#58153B, #3B5815
Split complementary#58151A, #585315
Tetradic#531558, #583215, #1A5815

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#60A5D9
Lighter +30%#378DCF
Lighter +20%#2972AA
Lighter +10%#1F5781
Darker −10%#0B1F2F
Darker −20%#010406
Darker −30%#000000
Darker −40%#000000
More saturated +25%#073D66
Less saturated −25%#23394A

Channel breakdown

R21
G59
B88
Red21 (8.2%)
Green59 (23.1%)
Blue88 (34.5%)
Hue205.97°
Saturation (HSL)61.47%
Lightness21.37%
Dominant channelBlue
Hex per channelR 15 · G 3B · B 58

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Every value on this page was computed from “153b58” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.