#3C3D73
Closest named color: Dark Slate Blue (#483D8B). oklch(38.7% 0.09 280.5), rgb(60, 61, 115).
Aa
White text reads best on this color (9.96:1).
About this color
#3C3D73 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.090 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.045 away. White text reads best on it, at 9.96:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.10:1 |
| White text | 9.96:1 |
Values
| HEX | #3C3D73 |
| RGB | rgb(60, 61, 115) |
| HSL | hsl(239, 31%, 34%) |
| OKLCH | oklch(38.7% 0.09 280.5) |
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 #3C3D73 | 9.96:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #3C3D73 | 2.10:1 | Fails | Lc 10.9 | Not readable |
| #3C3D73 text on white | 9.96:1 | AAA | Lc 93.0 | Preferred for body text |
| #3C3D73 text on black | 2.10:1 | Fails | Lc -9.5 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D4D7F2
oklch(88.5% 0.037 280.6)
-
Step 300
300
#B8BCEC
oklch(80.8% 0.068 281)
-
Step 400
400
#9499E3
oklch(70.8% 0.108 280.3)
-
Step 500
500
#7B7DDB
oklch(63% 0.139 280.7)
-
Step 600
600
#6565C8
oklch(55.6% 0.15 280.4)
-
Step 700
700
#5453AD
oklch(49.1% 0.14 280.4)
-
Step 800
800
#45448C
oklch(42.6% 0.116 280.9)
-
Step 900
900 (this color)
#3C3D73
oklch(38.7% 0.09 280.5)
-
Step 950
950
#222242
oklch(27% 0.059 281.7)
#3C3D73 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) | #284575 | 0.033 |
| Deuteranopia (no green cones) | #244172 | 0.033 |
| Tritanopia (no blue cones) | #294852 | 0.078 |
| Achromatopsia (no color) | #434343 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C3D73
#3C3D73
oklch(38.7% 0.09 280.5)
- #4E4500
#4E4500
oklch(38.8% 0.081 100.9)
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 #3C3D73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.045
- Twilight Blue #0A437A ΔE 0.051
- Cobalt #1E488F ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.061
- Blueberry #464196 ΔE 0.061
- Light Navy #155084 ΔE 0.064
- Marine Blue #01386A ΔE 0.068
- Prussian Blue #1D3557 ΔE 0.071
Use #3C3D73 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.