#3C3187
Closest named color: Dark Slate Blue (#483D8B). oklch(37.9% 0.138 283.4), rgb(60, 49, 135).
Aa
White text reads best on this color (10.59:1).
About this color
#3C3187 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.138 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.039 away. White text reads best on it, at 10.59:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.98:1 |
| White text | 10.59:1 |
Values
| HEX | #3C3187 |
| RGB | rgb(60, 49, 135) |
| HSL | hsl(248, 47%, 36%) |
| OKLCH | oklch(37.9% 0.138 283.4) |
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 #3C3187 | 10.59:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #3C3187 | 1.98:1 | Fails | Lc 9.7 | Not readable |
| #3C3187 text on white | 10.59:1 | AAA | Lc 94.2 | Preferred for body text |
| #3C3187 text on black | 1.98:1 | 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
#E7E8FE
oklch(93.7% 0.03 283.7)
-
Step 200
200
#D3D5FF
oklch(88.5% 0.058 283)
-
Step 300
300
#B8B8FF
oklch(80.8% 0.1 283.9)
-
Step 400
400
#9590FF
oklch(70.6% 0.159 283.6)
-
Step 500
500
#7E6FFF
oklch(63% 0.206 283.5)
-
Step 600
600
#6A50F2
oklch(55.6% 0.23 283.3)
-
Step 700
700
#593FD2
oklch(49.1% 0.213 283.4)
-
Step 800
800
#4835AA
oklch(42.6% 0.177 283.3)
-
Step 900
900 (this color)
#3C3187
oklch(37.9% 0.138 283.4)
-
Step 950
950
#221D4F
oklch(26.9% 0.089 283.2)
#3C3187 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) | #00418A | 0.064 |
| Deuteranopia (no green cones) | #003C85 | 0.062 |
| Tritanopia (no blue cones) | #1B4657 | 0.117 |
| Achromatopsia (no color) | #3F3F3F | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C3187
#3C3187
oklch(37.9% 0.138 283.4)
- #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 #3C3187, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.039
- Blueberry #464196 ΔE 0.050
- Cobalt #1E488F ΔE 0.065
- Sapphire #2138AB ΔE 0.070
- Twilight Blue #0A437A ΔE 0.071
- Imperial Purple #480CA8 ΔE 0.073
- Indigo #4B0082 ΔE 0.076
- Indigo Blue #3A18B1 ΔE 0.078
Use #3C3187 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.