#3A3886
Closest named color: Dark Slate Blue (#483D8B). oklch(38.9% 0.127 279.9), rgb(58, 56, 134).
Aa
White text reads best on this color (10.04:1).
About this color
#3A3886 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.127 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.029 away. White text reads best on it, at 10.04:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.08:1 |
| White text | 10.04:1 |
Values
| HEX | #3A3886 |
| RGB | rgb(58, 56, 134) |
| HSL | hsl(242, 41%, 37%) |
| OKLCH | oklch(38.9% 0.127 279.9) |
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 #3A3886 | 10.04:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #3A3886 | 2.08:1 | Fails | Lc 10.9 | Not readable |
| #3A3886 text on white | 10.04:1 | AAA | Lc 93.0 | Preferred for body text |
| #3A3886 text on black | 2.08:1 | Fails | Lc -9.5 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E8FD
oklch(93.6% 0.028 281.5)
-
Step 200
200
#D1D6FC
oklch(88.4% 0.053 279.4)
-
Step 300
300
#B4BAFE
oklch(80.9% 0.096 280.1)
-
Step 400
400
#8F94FD
oklch(70.8% 0.152 279.7)
-
Step 500
500
#7674FB
oklch(63% 0.196 279.8)
-
Step 600
600
#6258EA
oklch(55.6% 0.212 280)
-
Step 700
700
#5247CB
oklch(49.1% 0.196 280.1)
-
Step 800
800
#423BA4
oklch(42.6% 0.163 279.9)
-
Step 900
900 (this color)
#3A3886
oklch(38.9% 0.127 279.9)
-
Step 950
950
#20204C
oklch(27.1% 0.079 279.7)
#3A3886 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) | #004589 | 0.056 |
| Deuteranopia (no green cones) | #003F84 | 0.054 |
| Tritanopia (no blue cones) | #154A59 | 0.109 |
| Achromatopsia (no color) | #424242 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A3886
#3A3886
oklch(38.9% 0.127 279.9)
- #4F4500
#4F4500
oklch(38.9% 0.081 99.9)
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 #3A3886, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Blueberry #464196 ΔE 0.040
- Cobalt #1E488F ΔE 0.050
- Twilight Blue #0A437A ΔE 0.059
- Sapphire #2138AB ΔE 0.068
- Light Navy #155084 ΔE 0.072
- Dusk Blue #26538D ΔE 0.074
- Marine Blue #01386A ΔE 0.078
Use #3A3886 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.