#3B308A
Closest named color: Dark Slate Blue (#483D8B). oklch(37.9% 0.143 282.7), rgb(59, 48, 138).
Aa
White text reads best on this color (10.62:1).
About this color
#3B308A is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.143 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.041 away. White text reads best on it, at 10.62:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.97:1 |
| White text | 10.62:1 |
Values
| HEX | #3B308A |
| RGB | rgb(59, 48, 138) |
| HSL | hsl(247, 48%, 36%) |
| OKLCH | oklch(37.9% 0.143 282.7) |
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 #3B308A | 10.62:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #3B308A | 1.97:1 | Fails | Lc 9.7 | Not readable |
| #3B308A text on white | 10.62:1 | AAA | Lc 94.2 | Preferred for body text |
| #3B308A text on black | 1.97:1 | Fails | Lc -8.4 | 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E6E8FF
oklch(93.6% 0.031 281.8)
-
Step 200
200
#D3D5FF
oklch(88.5% 0.058 283)
-
Step 300
300
#B7B9FF
oklch(80.9% 0.098 282.7)
-
Step 400
400
#9491FF
oklch(70.7% 0.158 282.8)
-
Step 500
500
#7C70FF
oklch(63.1% 0.205 282.6)
-
Step 600
600
#694DF7
oklch(55.6% 0.239 282.9)
-
Step 700
700
#583CD7
oklch(49.1% 0.222 282.8)
-
Step 800
800
#4734AE
oklch(42.7% 0.184 282.4)
-
Step 900
900 (this color)
#3B308A
oklch(37.9% 0.143 282.7)
-
Step 950
950
#221D50
oklch(27% 0.09 283)
#3B308A 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) | #00418D | 0.063 |
| Deuteranopia (no green cones) | #003B88 | 0.060 |
| Tritanopia (no blue cones) | #144658 | 0.121 |
| Achromatopsia (no color) | #3E3E3E | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B308A
#3B308A
oklch(37.9% 0.143 282.7)
- #4A4300
#4A4300
oklch(37.8% 0.079 102.7)
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 #3B308A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.041
- Blueberry #464196 ΔE 0.051
- Sapphire #2138AB ΔE 0.065
- Cobalt #1E488F ΔE 0.065
- Imperial Purple #480CA8 ΔE 0.069
- Indigo Blue #3A18B1 ΔE 0.072
- Twilight Blue #0A437A ΔE 0.073
- Indigo #4B0082 ΔE 0.075
Use #3B308A 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.