#3C3A78
Closest named color: Dark Slate Blue (#483D8B). oklch(38.4% 0.103 281.9), rgb(60, 58, 120).
Aa
White text reads best on this color (10.15:1).
About this color
#3C3A78 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.103 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.038 away. White text reads best on it, at 10.15:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.06:1 |
| White text | 10.15:1 |
Values
| HEX | #3C3A78 |
| RGB | rgb(60, 58, 120) |
| HSL | hsl(242, 35%, 35%) |
| OKLCH | oklch(38.4% 0.103 281.9) |
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 #3C3A78 | 10.15:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #3C3A78 | 2.06:1 | Fails | Lc 10.5 | Not readable |
| #3C3A78 text on white | 10.15:1 | AAA | Lc 93.4 | Preferred for body text |
| #3C3A78 text on black | 2.06:1 | Fails | Lc -9.1 | 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
#E7E8F9
oklch(93.5% 0.023 283.3)
-
Step 200
200
#D4D6F5
oklch(88.4% 0.043 282.6)
-
Step 300
300
#B8BBF2
oklch(80.9% 0.077 282.1)
-
Step 400
400
#9596EB
oklch(70.7% 0.123 282.3)
-
Step 500
500
#7C7AE5
oklch(63.1% 0.157 281.7)
-
Step 600
600
#6760D3
oklch(55.6% 0.171 282)
-
Step 700
700
#564FB7
oklch(49.2% 0.159 281.9)
-
Step 800
800
#464194
oklch(42.7% 0.132 281.9)
-
Step 900
900 (this color)
#3C3A78
oklch(38.4% 0.103 281.9)
-
Step 950
950
#222145
oklch(26.9% 0.066 282.3)
#3C3A78 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) | #1E447A | 0.043 |
| Deuteranopia (no green cones) | #1A3F77 | 0.043 |
| Tritanopia (no blue cones) | #274753 | 0.088 |
| Achromatopsia (no color) | #414141 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C3A78
#3C3A78
oklch(38.4% 0.103 281.9)
- #4C4400
#4C4400
oklch(38.3% 0.08 101.8)
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 #3C3A78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.038
- Twilight Blue #0A437A ΔE 0.053
- Blueberry #464196 ΔE 0.055
- Cobalt #1E488F ΔE 0.057
- Marine Blue #01386A ΔE 0.069
- Light Navy #155084 ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.072
- Dusk Blue #26538D ΔE 0.074
Use #3C3A78 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.