#3C3C79
Closest named color: Dark Slate Blue (#483D8B). oklch(38.9% 0.101 280.6), rgb(60, 60, 121).
Aa
White text reads best on this color (9.93:1).
About this color
#3C3C79 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.101 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.036 away. White text reads best on it, at 9.93:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.11:1 |
| White text | 9.93:1 |
Values
| HEX | #3C3C79 |
| RGB | rgb(60, 60, 121) |
| HSL | hsl(240, 34%, 35%) |
| OKLCH | oklch(38.9% 0.101 280.6) |
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 #3C3C79 | 9.93:1 | AAA | Lc -97.0 | Preferred for body text |
| Black text on #3C3C79 | 2.11:1 | Fails | Lc 11.1 | Not readable |
| #3C3C79 text on white | 9.93:1 | AAA | Lc 92.9 | Preferred for body text |
| #3C3C79 text on black | 2.11:1 | Fails | Lc -9.6 | 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
#E7E9F9
oklch(93.7% 0.022 280.3)
-
Step 200
200
#D3D7F5
oklch(88.5% 0.041 279.5)
-
Step 300
300
#B7BCF1
oklch(81% 0.075 280.4)
-
Step 400
400
#9397EB
oklch(70.7% 0.122 280.7)
-
Step 500
500
#7A7BE4
oklch(63.1% 0.155 280.6)
-
Step 600
600
#6561D2
oklch(55.5% 0.169 281)
-
Step 700
700
#5450B6
oklch(49.1% 0.157 280.7)
-
Step 800
800
#444293
oklch(42.6% 0.13 280.5)
-
Step 900
900 (this color)
#3C3C79
oklch(38.9% 0.101 280.6)
-
Step 950
950
#212245
oklch(27.1% 0.064 280)
#3C3C79 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) | #21457B | 0.039 |
| Deuteranopia (no green cones) | #1C4178 | 0.040 |
| Tritanopia (no blue cones) | #264954 | 0.088 |
| Achromatopsia (no color) | #434343 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C3C79
#3C3C79
oklch(38.9% 0.101 280.6)
- #4F4500
#4F4500
oklch(38.9% 0.081 99.9)
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 #3C3C79, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.036
- Twilight Blue #0A437A ΔE 0.052
- Blueberry #464196 ΔE 0.052
- Cobalt #1E488F ΔE 0.054
- Light Navy #155084 ΔE 0.064
- Dusk Blue #26538D ΔE 0.069
- Marine Blue #01386A ΔE 0.070
- Dark Grey Blue #29465B ΔE 0.070
Use #3C3C79 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.