#372A69
Closest named color: Prussian Blue (#1D3557). oklch(33.6% 0.106 288.9), rgb(55, 42, 105).
Aa
White text reads best on this color (12.37:1).
About this color
#372A69 is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.106 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.060 away. White text reads best on it, at 12.37:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.69:1 |
| White text | 12.37:1 |
Values
| HEX | #372A69 |
| RGB | rgb(55, 42, 105) |
| HSL | hsl(252, 43%, 29%) |
| OKLCH | oklch(33.6% 0.106 288.9) |
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 #372A69 | 12.37:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #372A69 | 1.69:1 | Fails | Lc 0.0 | Not readable |
| #372A69 text on white | 12.37:1 | AAA | Lc 97.9 | Preferred for body text |
| #372A69 text on black | 1.69:1 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F9
oklch(93.7% 0.023 288.7)
-
Step 200
200
#D7D5F5
oklch(88.5% 0.044 288.3)
-
Step 300
300
#BEB9F1
oklch(80.9% 0.079 288.6)
-
Step 400
400
#9E92EA
oklch(70.6% 0.127 289)
-
Step 500
500
#8875E4
oklch(63.1% 0.162 288.8)
-
Step 600
600
#735BD2
oklch(55.7% 0.176 288.6)
-
Step 700
700
#614AB6
oklch(49.2% 0.164 288.7)
-
Step 800
800
#4F3D93
oklch(42.7% 0.136 289)
-
Step 900
900 (this color)
#372A69
oklch(33.6% 0.106 288.9)
-
Step 950
950
#262045
oklch(27.1% 0.067 288.6)
#372A69 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) | #04366B | 0.062 |
| Deuteranopia (no green cones) | #063368 | 0.060 |
| Tritanopia (no blue cones) | #283845 | 0.087 |
| Achromatopsia (no color) | #343434 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372A69
#372A69
oklch(33.6% 0.106 288.9)
- #3A3A00
#3A3A00
oklch(33.7% 0.074 109.8)
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 #372A69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.060
- Marine Blue #01386A ΔE 0.065
- Marine #042E60 ΔE 0.065
- Midnight Blue #191970 ΔE 0.071
- Royal Purple #4B006E ΔE 0.075
- Space Cadet #2B2D42 ΔE 0.075
- Indigo #4B0082 ΔE 0.080
- Twilight Blue #0A437A ΔE 0.080
Use #372A69 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.