#3B396C
Closest named color: Twilight Blue (#0A437A). oklch(37.3% 0.086 283.2), rgb(59, 57, 108).
Aa
White text reads best on this color (10.56:1).
About this color
#3B396C is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.086 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.056 away. White text reads best on it, at 10.56:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.98:1 |
| White text | 10.56:1 |
Values
| HEX | #3B396C |
| RGB | rgb(59, 57, 108) |
| HSL | hsl(242, 31%, 32%) |
| OKLCH | oklch(37.3% 0.086 283.2) |
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 #3B396C | 10.56:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #3B396C | 1.98:1 | Fails | Lc 9.5 | Not readable |
| #3B396C text on white | 10.56:1 | AAA | Lc 94.4 | Preferred for body text |
| #3B396C text on black | 1.98:1 | Fails | Lc -8.2 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F6
oklch(93.7% 0.018 282.5)
-
Step 200
200
#D5D7F1
oklch(88.6% 0.036 282.1)
-
Step 300
300
#BABCEA
oklch(80.9% 0.065 282.9)
-
Step 400
400
#9898DF
oklch(70.7% 0.103 283.5)
-
Step 500
500
#7F7DD6
oklch(63.1% 0.132 283)
-
Step 600
600
#6A65C3
oklch(55.7% 0.142 283.2)
-
Step 700
700
#5853A9
oklch(49.1% 0.134 282.9)
-
Step 800
800
#484489
oklch(42.7% 0.111 283.2)
-
Step 900
900 (this color)
#3B396C
oklch(37.3% 0.086 283.2)
-
Step 950
950
#232240
oklch(26.9% 0.055 283.6)
#3B396C 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) | #26406E | 0.033 |
| Deuteranopia (no green cones) | #233D6B | 0.034 |
| Tritanopia (no blue cones) | #2C434D | 0.073 |
| Achromatopsia (no color) | #3F3F3F | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B396C
#3B396C
oklch(37.3% 0.086 283.2)
- #484200
#484200
oklch(37.3% 0.079 103.7)
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 #3B396C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.059
- Marine Blue #01386A ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.071
- Cobalt #1E488F ΔE 0.071
- Charcoal #264653 ΔE 0.072
Use #3B396C 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.