#372C69
Closest named color: Prussian Blue (#1D3557). oklch(34% 0.102 288), rgb(55, 44, 105).
Aa
White text reads best on this color (12.16:1).
About this color
#372C69 is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.102 and its hue 288°. 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 12.16:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.72:1 |
| White text | 12.16:1 |
Values
| HEX | #372C69 |
| RGB | rgb(55, 44, 105) |
| HSL | hsl(251, 41%, 29%) |
| OKLCH | oklch(34% 0.102 288) |
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 #372C69 | 12.16:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #372C69 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #372C69 text on white | 12.16:1 | AAA | Lc 97.5 | Preferred for body text |
| #372C69 text on black | 1.72:1 | 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
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D7D5F5
oklch(88.5% 0.044 288.3)
-
Step 300
300
#BDB9F0
oklch(80.8% 0.077 287.9)
-
Step 400
400
#9D93E9
oklch(70.6% 0.124 288.1)
-
Step 500
500
#8776E2
oklch(63.1% 0.158 288.2)
-
Step 600
600
#725CD0
oklch(55.6% 0.172 288.2)
-
Step 700
700
#5F4BB4
oklch(49% 0.16 287.8)
-
Step 800
800
#4E3E91
oklch(42.6% 0.131 288.4)
-
Step 900
900 (this color)
#372C69
oklch(34% 0.102 288)
-
Step 950
950
#252044
oklch(26.9% 0.065 287.6)
#372C69 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) | #0B376B | 0.057 |
| Deuteranopia (no green cones) | #0B3468 | 0.056 |
| Tritanopia (no blue cones) | #283946 | 0.084 |
| Achromatopsia (no color) | #363636 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372C69
#372C69
oklch(34% 0.102 288)
- #3C3A00
#3C3A00
oklch(33.9% 0.073 107.6)
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 #372C69, 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 0.062
- Marine #042E60 ΔE 0.065
- Midnight Blue #191970 ΔE 0.074
- Space Cadet #2B2D42 ΔE 0.074
- Twilight Blue #0A437A ΔE 0.076
- Dark Slate Blue #483D8B ΔE 0.077
- Royal Purple #4B006E ΔE 0.079
Use #372C69 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.