#3A3575
Closest named color: Dark Slate Blue (#483D8B). oklch(37% 0.106 283.4), rgb(58, 53, 117).
Aa
White text reads best on this color (10.79:1).
About this color
#3A3575 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.106 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 10.79:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.94:1 |
| White text | 10.79:1 |
Values
| HEX | #3A3575 |
| RGB | rgb(58, 53, 117) |
| HSL | hsl(245, 38%, 33%) |
| OKLCH | oklch(37% 0.106 283.4) |
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 #3A3575 | 10.79:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #3A3575 | 1.94:1 | Fails | Lc 9.1 | Not readable |
| #3A3575 text on white | 10.79:1 | AAA | Lc 94.8 | Preferred for body text |
| #3A3575 text on black | 1.94:1 | Fails | Lc -7.8 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8F9
oklch(93.5% 0.023 283.3)
-
Step 200
200
#D5D6F6
oklch(88.5% 0.044 284)
-
Step 300
300
#B9BAF3
oklch(80.8% 0.08 283.7)
-
Step 400
400
#9795ED
oklch(70.7% 0.127 283.7)
-
Step 500
500
#7F78E7
oklch(63.1% 0.162 283.6)
-
Step 600
600
#6A5ED5
oklch(55.6% 0.176 283.6)
-
Step 700
700
#584DB9
oklch(49.1% 0.164 283.1)
-
Step 800
800
#484096
oklch(42.8% 0.136 283.2)
-
Step 900
900 (this color)
#3A3575
oklch(37% 0.106 283.4)
-
Step 950
950
#232146
oklch(27.1% 0.067 283.4)
#3A3575 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) | #154077 | 0.050 |
| Deuteranopia (no green cones) | #113B74 | 0.050 |
| Tritanopia (no blue cones) | #25434F | 0.091 |
| Achromatopsia (no color) | #3D3D3D | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A3575
#3A3575
oklch(37% 0.106 283.4)
- #474100
#474100
oklch(37% 0.078 103.6)
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 #3A3575, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Twilight Blue #0A437A ΔE 0.058
- Marine Blue #01386A ΔE 0.064
- Blueberry #464196 ΔE 0.065
- Cobalt #1E488F ΔE 0.067
- Prussian Blue #1D3557 ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.078
- Marine #042E60 ΔE 0.080
Use #3A3575 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.