#3B588A
Closest named color: Denim Blue (#3B5B92). oklch(46.2% 0.089 260.7), rgb(59, 88, 138).
Aa
White text reads best on this color (7.12:1).
About this color
#3B588A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.089 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.014 away. White text reads best on it, at 7.12:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 2.94:1 |
| White text | 7.12:1 |
Values
| HEX | #3B588A |
| RGB | rgb(59, 88, 138) |
| HSL | hsl(218, 40%, 39%) |
| OKLCH | oklch(46.2% 0.089 260.7) |
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 #3B588A | 7.12:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #3B588A | 2.94:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #3B588A text on white | 7.12:1 | AAA | Lc 84.6 | Fine for body text |
| #3B588A text on black | 2.94:1 | Fails | Lc -17.4 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B1C2DD
oklch(81% 0.043 259.6)
-
Step 400
400
#88A2CC
oklch(70.8% 0.068 259.9)
-
Step 500
500
#6B8ABF
oklch(63.1% 0.088 260.8)
-
Step 600
600
#5273AB
oklch(55.5% 0.096 260.5)
-
Step 700
700 (this color)
#3B588A
oklch(46.2% 0.089 260.7)
-
Step 800
800
#374F77
oklch(42.7% 0.073 260.2)
-
Step 900
900
#304260
oklch(37.8% 0.057 260.3)
-
Step 950
950
#1C2738
oklch(27.1% 0.035 258.9)
#3B588A 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) | #445C8C | 0.017 |
| Deuteranopia (no green cones) | #3A5589 | 0.009 |
| Tritanopia (no blue cones) | #07636A | 0.080 |
| Achromatopsia (no color) | #585858 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B588A
#3B588A
oklch(46.2% 0.089 260.7)
- #72520F
#72520F
oklch(46.1% 0.089 80.3)
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 #3B588A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.014
- Light Navy Blue #2E5A88 ΔE 0.015
- Dusk #4E5481 ΔE 0.028
- Dusk Blue #26538D ΔE 0.029
- Dusky Blue #475F94 ΔE 0.030
- Twilight #4E518B ΔE 0.031
- Denim #3B638C ΔE 0.032
- YInMn Blue #415A77 ΔE 0.034
Use #3B588A 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.