#3C397D
Closest named color: Dark Slate Blue (#483D8B). oklch(38.6% 0.112 281.8), rgb(60, 57, 125).
Aa
White text reads best on this color (10.12:1).
About this color
#3C397D is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.112 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.033 away. White text reads best on it, at 10.12:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.07:1 |
| White text | 10.12:1 |
Values
| HEX | #3C397D |
| RGB | rgb(60, 57, 125) |
| HSL | hsl(243, 37%, 36%) |
| OKLCH | oklch(38.6% 0.112 281.8) |
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 #3C397D | 10.12:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #3C397D | 2.07:1 | Fails | Lc 10.6 | Not readable |
| #3C397D text on white | 10.12:1 | AAA | Lc 93.3 | Preferred for body text |
| #3C397D text on black | 2.07:1 | Fails | Lc -9.2 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D3D6F8
oklch(88.5% 0.047 281.4)
-
Step 300
300
#B7BBF6
oklch(81% 0.083 281.3)
-
Step 400
400
#9495F2
oklch(70.8% 0.134 281.9)
-
Step 500
500
#7B78ED
oklch(63.2% 0.171 281.5)
-
Step 600
600
#665DDB
oklch(55.6% 0.186 281.7)
-
Step 700
700
#554CBE
oklch(49.1% 0.173 281.5)
-
Step 800
800
#463F9A
oklch(42.8% 0.143 281.9)
-
Step 900
900 (this color)
#3C397D
oklch(38.6% 0.112 281.8)
-
Step 950
950
#222148
oklch(27.2% 0.071 281.8)
#3C397D 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) | #16447F | 0.049 |
| Deuteranopia (no green cones) | #103F7C | 0.050 |
| Tritanopia (no blue cones) | #234855 | 0.096 |
| Achromatopsia (no color) | #424242 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C397D
#3C397D
oklch(38.6% 0.112 281.8)
- #4D4500
#4D4500
oklch(38.6% 0.081 101.9)
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 #3C397D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.033
- Blueberry #464196 ΔE 0.049
- Cobalt #1E488F ΔE 0.055
- Twilight Blue #0A437A ΔE 0.055
- Light Navy #155084 ΔE 0.070
- Marine Blue #01386A ΔE 0.072
- Dusk Blue #26538D ΔE 0.074
- Twilight #4E518B ΔE 0.076
Use #3C397D 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.