#3B3E73
Closest named color: Dark Slate Blue (#483D8B). oklch(38.8% 0.089 278.9), rgb(59, 62, 115).
Aa
White text reads best on this color (9.89:1).
About this color
#3B3E73 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.089 and its hue 279°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.046 away. White text reads best on it, at 9.89:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.12:1 |
| White text | 9.89:1 |
Values
| HEX | #3B3E73 |
| RGB | rgb(59, 62, 115) |
| HSL | hsl(237, 32%, 34%) |
| OKLCH | oklch(38.8% 0.089 278.9) |
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 #3B3E73 | 9.89:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #3B3E73 | 2.12:1 | Fails | Lc 11.1 | Not readable |
| #3B3E73 text on white | 9.89:1 | AAA | Lc 92.8 | Preferred for body text |
| #3B3E73 text on black | 2.12:1 | Fails | Lc -9.6 | Not readable |
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 900.
-
Step 50
50
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D3D7F2
oklch(88.4% 0.037 278.9)
-
Step 300
300
#B7BDEC
oklch(81% 0.067 279.1)
-
Step 400
400
#9299E2
oklch(70.6% 0.107 279.1)
-
Step 500
500
#797FDA
oklch(63.2% 0.136 278.9)
-
Step 600
600
#6366C8
oklch(55.7% 0.149 279.1)
-
Step 700
700
#5254AC
oklch(49% 0.137 279.1)
-
Step 800
800
#43458C
oklch(42.7% 0.115 279.1)
-
Step 900
900 (this color)
#3B3E73
oklch(38.8% 0.089 278.9)
-
Step 950
950
#212341
oklch(27% 0.055 279.1)
#3B3E73 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) | #294575 | 0.029 |
| Deuteranopia (no green cones) | #254172 | 0.030 |
| Tritanopia (no blue cones) | #274953 | 0.077 |
| Achromatopsia (no color) | #434343 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3E73
#3B3E73
oklch(38.8% 0.089 278.9)
- #504500
#504500
oklch(39% 0.081 98.9)
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 #3B3E73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.046
- Twilight Blue #0A437A ΔE 0.049
- Cobalt #1E488F ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.058
- Blueberry #464196 ΔE 0.061
- Light Navy #155084 ΔE 0.061
- Marine Blue #01386A ΔE 0.067
- Dusk Blue #26538D ΔE 0.069
Use #3B3E73 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.