#372B6E
Closest named color: Prussian Blue (#1D3557). oklch(34.2% 0.111 287.2), rgb(55, 43, 110).
Aa
White text reads best on this color (12.11:1).
About this color
#372B6E is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.111 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.064 away. White text reads best on it, at 12.11:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.73:1 |
| White text | 12.11:1 |
Values
| HEX | #372B6E |
| RGB | rgb(55, 43, 110) |
| HSL | hsl(251, 44%, 30%) |
| OKLCH | oklch(34.2% 0.111 287.2) |
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 #372B6E | 12.11:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #372B6E | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #372B6E text on white | 12.11:1 | AAA | Lc 97.4 | Preferred for body text |
| #372B6E text on black | 1.73:1 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D6D5F7
oklch(88.4% 0.047 286.8)
-
Step 300
300
#BDB9F4
oklch(81% 0.083 287.5)
-
Step 400
400
#9C92EF
oklch(70.7% 0.134 287.4)
-
Step 500
500
#8574EA
oklch(63.1% 0.172 287)
-
Step 600
600
#7159D8
oklch(55.6% 0.186 287.4)
-
Step 700
700
#5F48BB
oklch(49.1% 0.173 287.4)
-
Step 800
800
#4D3C97
oklch(42.6% 0.143 287.3)
-
Step 900
900 (this color)
#372B6E
oklch(34.2% 0.111 287.2)
-
Step 950
950
#251F47
oklch(26.9% 0.072 287.4)
#372B6E 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) | #003770 | 0.062 |
| Deuteranopia (no green cones) | #00346D | 0.062 |
| Tritanopia (no blue cones) | #253A48 | 0.092 |
| Achromatopsia (no color) | #363636 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372B6E
#372B6E
oklch(34.2% 0.111 287.2)
- #3D3B00
#3D3B00
oklch(34.3% 0.074 107.6)
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 #372B6E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.064
- Marine Blue #01386A ΔE 0.065
- Marine #042E60 ΔE 0.068
- Midnight Blue #191970 ΔE 0.071
- Dark Slate Blue #483D8B ΔE 0.073
- Twilight Blue #0A437A ΔE 0.076
- Royal Purple #4B006E ΔE 0.076
- Indigo #4B0082 ΔE 0.077
Use #372B6E 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.