#3B366F
Closest named color: Dark Slate Blue (#483D8B). oklch(36.9% 0.095 284.7), rgb(59, 54, 111).
Aa
White text reads best on this color (10.80:1).
About this color
#3B366F is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.095 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.055 away. White text reads best on it, at 10.80:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.94:1 |
| White text | 10.80:1 |
Values
| HEX | #3B366F |
| RGB | rgb(59, 54, 111) |
| HSL | hsl(245, 35%, 32%) |
| OKLCH | oklch(36.9% 0.095 284.7) |
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 #3B366F | 10.80:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #3B366F | 1.94:1 | Fails | Lc 9.0 | Not readable |
| #3B366F text on white | 10.80:1 | AAA | Lc 94.9 | Preferred for body text |
| #3B366F text on black | 1.94:1 | Fails | Lc -7.7 | 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
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D6D6F3
oklch(88.5% 0.04 285.6)
-
Step 300
300
#BBBBEE
oklch(80.9% 0.072 284.7)
-
Step 400
400
#9996E5
oklch(70.7% 0.114 284.8)
-
Step 500
500
#817ADD
oklch(63% 0.146 284.6)
-
Step 600
600
#6C61CB
oklch(55.6% 0.159 284.7)
-
Step 700
700
#5A4FB0
oklch(49% 0.149 284.6)
-
Step 800
800
#4A428E
oklch(42.8% 0.121 284.8)
-
Step 900
900 (this color)
#3B366F
oklch(36.9% 0.095 284.7)
-
Step 950
950
#242142
oklch(26.9% 0.06 285.8)
#3B366F 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) | #1E3F71 | 0.043 |
| Deuteranopia (no green cones) | #1C3C6E | 0.043 |
| Tritanopia (no blue cones) | #2B424D | 0.081 |
| Achromatopsia (no color) | #3D3D3D | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B366F
#3B366F
oklch(36.9% 0.095 284.7)
- #464100
#464100
oklch(36.9% 0.078 104.7)
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 #3B366F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.055
- Twilight Blue #0A437A ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.062
- Marine Blue #01386A ΔE 0.062
- Dark Grey Blue #29465B ΔE 0.069
- Blueberry #464196 ΔE 0.072
- Cobalt #1E488F ΔE 0.072
- Dark Blue Grey #1F3B4D ΔE 0.077
Use #3B366F 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.