#3A347A
Closest named color: Dark Slate Blue (#483D8B). oklch(37.2% 0.115 283.1), rgb(58, 52, 122).
Aa
White text reads best on this color (10.75:1).
About this color
#3A347A is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.115 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.044 away. White text reads best on it, at 10.75:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.95:1 |
| White text | 10.75:1 |
Values
| HEX | #3A347A |
| RGB | rgb(58, 52, 122) |
| HSL | hsl(245, 40%, 34%) |
| OKLCH | oklch(37.2% 0.115 283.1) |
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 #3A347A | 10.75:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #3A347A | 1.95:1 | Fails | Lc 9.2 | Not readable |
| #3A347A text on white | 10.75:1 | AAA | Lc 94.7 | Preferred for body text |
| #3A347A text on black | 1.95:1 | Fails | Lc -7.9 | 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
#E7E8FB
oklch(93.6% 0.026 283.5)
-
Step 200
200
#D4D6F9
oklch(88.6% 0.048 282.8)
-
Step 300
300
#B8BAF7
oklch(80.9% 0.086 282.8)
-
Step 400
400
#9594F3
oklch(70.7% 0.137 282.8)
-
Step 500
500
#7E76EF
oklch(63.2% 0.176 283.1)
-
Step 600
600
#695BDD
oklch(55.6% 0.191 283.1)
-
Step 700
700
#5849C0
oklch(49% 0.179 283.3)
-
Step 800
800
#483D9B
oklch(42.7% 0.147 283.5)
-
Step 900
900 (this color)
#3A347A
oklch(37.2% 0.115 283.1)
-
Step 950
950
#222048
oklch(26.9% 0.072 282.7)
#3A347A 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) | #09407C | 0.056 |
| Deuteranopia (no green cones) | #023B79 | 0.057 |
| Tritanopia (no blue cones) | #224451 | 0.099 |
| Achromatopsia (no color) | #3E3E3E | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A347A
#3A347A
oklch(37.2% 0.115 283.1)
- #484100
#484100
oklch(37.1% 0.078 102.6)
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 #3A347A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.044
- Twilight Blue #0A437A ΔE 0.060
- Blueberry #464196 ΔE 0.060
- Cobalt #1E488F ΔE 0.065
- Marine Blue #01386A ΔE 0.067
- Prussian Blue #1D3557 ΔE 0.076
- Light Navy #155084 ΔE 0.082
- Marine #042E60 ΔE 0.083
Use #3A347A 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.