#3A3985
Closest named color: Dark Slate Blue (#483D8B). oklch(39% 0.124 279.6), rgb(58, 57, 133).
Aa
White text reads best on this color (9.98:1).
About this color
#3A3985 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.124 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.028 away. White text reads best on it, at 9.98:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.10:1 |
| White text | 9.98:1 |
Values
| HEX | #3A3985 |
| RGB | rgb(58, 57, 133) |
| HSL | hsl(241, 40%, 37%) |
| OKLCH | oklch(39% 0.124 279.6) |
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 #3A3985 | 9.98:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #3A3985 | 2.10:1 | Fails | Lc 11.1 | Not readable |
| #3A3985 text on white | 9.98:1 | AAA | Lc 92.9 | Preferred for body text |
| #3A3985 text on black | 2.10:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E6E8FC
oklch(93.5% 0.027 281.3)
-
Step 200
200
#D1D6FC
oklch(88.4% 0.053 279.4)
-
Step 300
300
#B4BBFC
oklch(81% 0.092 279.4)
-
Step 400
400
#8F94FB
oklch(70.7% 0.149 279.8)
-
Step 500
500
#7676F8
oklch(63.2% 0.189 279.5)
-
Step 600
600
#615AE7
oklch(55.6% 0.206 279.5)
-
Step 700
700
#5148C9
oklch(49% 0.193 279.7)
-
Step 800
800
#423DA2
oklch(42.7% 0.158 279.6)
-
Step 900
900 (this color)
#3A3985
oklch(39% 0.124 279.6)
-
Step 950
950
#20204B
oklch(27% 0.078 279.9)
#3A3985 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) | #054588 | 0.053 |
| Deuteranopia (no green cones) | #004083 | 0.054 |
| Tritanopia (no blue cones) | #164A59 | 0.106 |
| Achromatopsia (no color) | #424242 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A3985
#3A3985
oklch(39% 0.124 279.6)
- #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 #3A3985, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.028
- Blueberry #464196 ΔE 0.040
- Cobalt #1E488F ΔE 0.048
- Twilight Blue #0A437A ΔE 0.057
- Light Navy #155084 ΔE 0.070
- Sapphire #2138AB ΔE 0.070
- Dusk Blue #26538D ΔE 0.072
- Twilight #4E518B ΔE 0.076
Use #3A3985 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.