#3C3369
Closest named color: Prussian Blue (#1D3557). oklch(35.9% 0.091 288.6), rgb(60, 51, 105).
Aa
White text reads best on this color (11.23:1).
About this color
#3C3369 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.091 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.058 away. White text reads best on it, at 11.23:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.86:1 |
| White text | 11.23:1 |
Values
| HEX | #3C3369 |
| RGB | rgb(60, 51, 105) |
| HSL | hsl(250, 35%, 31%) |
| OKLCH | oklch(35.9% 0.091 288.6) |
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 #3C3369 | 11.23:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #3C3369 | 1.86:1 | Fails | Lc 8.1 | Not readable |
| #3C3369 text on white | 11.23:1 | AAA | Lc 95.8 | Preferred for body text |
| #3C3369 text on black | 1.86:1 | Fails | Lc 0.0 | 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
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D7D6F1
oklch(88.5% 0.037 287.3)
-
Step 300
300
#BEBAEB
oklch(80.9% 0.069 288.5)
-
Step 400
400
#9E95E0
oklch(70.7% 0.108 288.8)
-
Step 500
500
#8779D8
oklch(63.1% 0.14 288.5)
-
Step 600
600
#7260C5
oklch(55.6% 0.151 288.7)
-
Step 700
700
#604FAA
oklch(49.1% 0.14 288.8)
-
Step 800
800
#4E418A
oklch(42.7% 0.117 288.6)
-
Step 900
900 (this color)
#3C3369
oklch(35.9% 0.091 288.6)
-
Step 950
950
#262141
oklch(27.1% 0.058 289.1)
#3C3369 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) | #1E3C6B | 0.046 |
| Deuteranopia (no green cones) | #1E3A68 | 0.045 |
| Tritanopia (no blue cones) | #2F3E49 | 0.076 |
| Achromatopsia (no color) | #3B3B3B | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C3369
#3C3369
oklch(35.9% 0.091 288.6)
- #414000
#414000
oklch(36.1% 0.078 108.8)
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 #3C3369, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.058
- Marine Blue #01386A ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.065
- Twilight Blue #0A437A ΔE 0.067
- Dark Grey Blue #29465B ΔE 0.071
- Dark Blue Grey #1F3B4D ΔE 0.074
- Marine #042E60 ΔE 0.075
- Space Cadet #2B2D42 ΔE 0.076
Use #3C3369 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.