#3B396E
Closest named color: Dark Slate Blue (#483D8B). oklch(37.4% 0.089 282.9), rgb(59, 57, 110).
Aa
White text reads best on this color (10.51:1).
About this color
#3B396E is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.089 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.054 away. White text reads best on it, at 10.51:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.99:1 |
| White text | 10.51:1 |
Values
| HEX | #3B396E |
| RGB | rgb(59, 57, 110) |
| HSL | hsl(242, 32%, 33%) |
| OKLCH | oklch(37.4% 0.089 282.9) |
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 #3B396E | 10.51:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #3B396E | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #3B396E text on white | 10.51:1 | AAA | Lc 94.3 | Preferred for body text |
| #3B396E text on black | 1.99:1 | Fails | Lc -8.3 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F7
oklch(93.7% 0.019 282.8)
-
Step 200
200
#D5D7F2
oklch(88.6% 0.037 282.2)
-
Step 300
300
#BABCEB
oklch(81% 0.066 282.9)
-
Step 400
400
#9798E1
oklch(70.7% 0.106 282.7)
-
Step 500
500
#7F7DD9
oklch(63.2% 0.136 282.8)
-
Step 600
600
#6964C6
oklch(55.6% 0.148 282.8)
-
Step 700
700
#5852AB
oklch(49% 0.138 283.1)
-
Step 800
800
#48448B
oklch(42.8% 0.114 283)
-
Step 900
900 (this color)
#3B396E
oklch(37.4% 0.089 282.9)
-
Step 950
950
#232241
oklch(27% 0.057 283.4)
#3B396E 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) | #244170 | 0.036 |
| Deuteranopia (no green cones) | #223D6D | 0.035 |
| Tritanopia (no blue cones) | #2B444E | 0.076 |
| Achromatopsia (no color) | #3F3F3F | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B396E
#3B396E
oklch(37.4% 0.089 282.9)
- #494200
#494200
oklch(37.4% 0.079 102.7)
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 #3B396E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Twilight Blue #0A437A ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.062
- Marine Blue #01386A ΔE 0.062
- Cobalt #1E488F ΔE 0.069
- Blueberry #464196 ΔE 0.071
- Dark Blue Grey #1F3B4D ΔE 0.074
Use #3B396E 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.