#3B588F
Closest named color: Denim Blue (#3B5B92). oklch(46.5% 0.096 262.2), rgb(59, 88, 143).
Aa
White text reads best on this color (7.05:1).
About this color
#3B588F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.096 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.009 away. White text reads best on it, at 7.05:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.97:1 |
| White text | 7.05:1 |
Values
| HEX | #3B588F |
| RGB | rgb(59, 88, 143) |
| HSL | hsl(219, 42%, 40%) |
| OKLCH | oklch(46.5% 0.096 262.2) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #3B588F | 7.05:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #3B588F | 2.97:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #3B588F text on white | 7.05:1 | AAA | Lc 84.3 | Fine for body text |
| #3B588F text on black | 2.97:1 | Fails | Lc -17.7 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D0DAEB
oklch(88.6% 0.026 261.1)
-
Step 300
300
#B1C1E0
oklch(80.9% 0.047 263.7)
-
Step 400
400
#87A1D0
oklch(70.7% 0.075 262.1)
-
Step 500
500
#6A89C3
oklch(63% 0.095 262.4)
-
Step 600
600
#5272B0
oklch(55.6% 0.104 262.7)
-
Step 700
700 (this color)
#3B588F
oklch(46.5% 0.096 262.2)
-
Step 800
800
#374E7B
oklch(42.7% 0.08 262.9)
-
Step 900
900
#2F4163
oklch(37.6% 0.063 262.4)
-
Step 950
950
#1C263A
oklch(26.9% 0.04 263.6)
#3B588F with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #415D91 | 0.017 |
| Deuteranopia (no green cones) | #36558E | 0.011 |
| Tritanopia (no blue cones) | #00646C | 0.086 |
| Achromatopsia (no color) | #595959 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B588F
#3B588F
oklch(46.5% 0.096 262.2)
- #745300
#745300
oklch(46.5% 0.096 81.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #3B588F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.009
- Light Navy Blue #2E5A88 ΔE 0.020
- Dusky Blue #475F94 ΔE 0.027
- Dusk Blue #26538D ΔE 0.028
- Twilight #4E518B ΔE 0.030
- Dusk #4E5481 ΔE 0.032
- Denim #3B638C ΔE 0.034
- YInMn Blue #415A77 ΔE 0.042
Use #3B588F in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.