#3C308B
Closest named color: Dark Slate Blue (#483D8B). oklch(38% 0.145 283.1), rgb(60, 48, 139).
Aa
White text reads best on this color (10.56:1).
About this color
#3C308B is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.145 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.040 away. White text reads best on it, at 10.56:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.98:1 |
| White text | 10.56:1 |
Values
| HEX | #3C308B |
| RGB | rgb(60, 48, 139) |
| HSL | hsl(248, 49%, 37%) |
| OKLCH | oklch(38% 0.145 283.1) |
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 #3C308B | 10.56:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #3C308B | 1.98:1 | Fails | Lc 9.9 | Not readable |
| #3C308B text on white | 10.56:1 | AAA | Lc 94.0 | Preferred for body text |
| #3C308B text on black | 1.98:1 | Fails | Lc -8.5 | 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
#7D70FF
oklch(63.1% 0.205 282.9)
-
Step 600
600
#6A4CF8
oklch(55.6% 0.242 283.2)
-
Step 700
700
#593BD8
oklch(49.1% 0.224 283.1)
-
Step 800
800
#4833AE
oklch(42.7% 0.185 283.1)
-
Step 900
900 (this color)
#3C308B
oklch(38% 0.145 283.1)
-
Step 950
950
#221D51
oklch(27.1% 0.092 282.7)
#3C308B 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) | #00428E | 0.065 |
| Deuteranopia (no green cones) | #003C89 | 0.062 |
| Tritanopia (no blue cones) | #174659 | 0.121 |
| Achromatopsia (no color) | #3F3F3F | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C308B
#3C308B
oklch(38% 0.145 283.1)
- #4A4400
#4A4400
oklch(38.1% 0.08 103.8)
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 #3C308B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.040
- Blueberry #464196 ΔE 0.049
- Sapphire #2138AB ΔE 0.065
- Cobalt #1E488F ΔE 0.066
- Imperial Purple #480CA8 ΔE 0.067
- Indigo Blue #3A18B1 ΔE 0.071
- Twilight Blue #0A437A ΔE 0.075
- Indigo #4B0082 ΔE 0.075
Use #3C308B 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.