#3B3769
Closest named color: Prussian Blue (#1D3557). oklch(36.7% 0.084 285.1), rgb(59, 55, 105).
Aa
White text reads best on this color (10.84:1).
About this color
#3B3769 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.084 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.056 away. White text reads best on it, at 10.84:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.93:1 |
| White text | 10.84:1 |
Values
| HEX | #3B3769 |
| RGB | rgb(59, 55, 105) |
| HSL | hsl(245, 31%, 31%) |
| OKLCH | oklch(36.7% 0.084 285.1) |
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 #3B3769 | 10.84:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #3B3769 | 1.93:1 | Fails | Lc 8.9 | Not readable |
| #3B3769 text on white | 10.84:1 | AAA | Lc 95.0 | Preferred for body text |
| #3B3769 text on black | 1.93:1 | Fails | Lc -7.6 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E8E8F6
oklch(93.5% 0.019 286)
-
Step 200
200
#D6D6F0
oklch(88.4% 0.036 285.7)
-
Step 300
300
#BCBCE9
oklch(81% 0.063 284.9)
-
Step 400
400
#9A98DD
oklch(70.8% 0.1 284.9)
-
Step 500
500
#827DD4
oklch(63.2% 0.129 284.7)
-
Step 600
600
#6D64C1
oklch(55.6% 0.14 285.3)
-
Step 700
700
#5B53A7
oklch(49.2% 0.13 284.9)
-
Step 800
800
#4A4487
oklch(42.7% 0.108 284.9)
-
Step 900
900 (this color)
#3B3769
oklch(36.7% 0.084 285.1)
-
Step 950
950
#24223F
oklch(27% 0.053 285.4)
#3B3769 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) | #243F6B | 0.037 |
| Deuteranopia (no green cones) | #233C68 | 0.036 |
| Tritanopia (no blue cones) | #2D414B | 0.071 |
| Achromatopsia (no color) | #3D3D3D | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B3769
#3B3769
oklch(36.7% 0.084 285.1)
- #454100
#454100
oklch(36.7% 0.078 105.7)
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 #3B3769, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.061
- Marine Blue #01386A ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.063
- Dark Blue Grey #1F3B4D ΔE 0.068
- Charcoal #264653 ΔE 0.073
- Marine #042E60 ΔE 0.077
Use #3B3769 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.