#372C6D
Closest named color: Prussian Blue (#1D3557). oklch(34.3% 0.108 287), rgb(55, 44, 109).
Aa
White text reads best on this color (12.04:1).
About this color
#372C6D is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.108 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.062 away. White text reads best on it, at 12.04:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.74:1 |
| White text | 12.04:1 |
Values
| HEX | #372C6D |
| RGB | rgb(55, 44, 109) |
| HSL | hsl(250, 42%, 30%) |
| OKLCH | oklch(34.3% 0.108 287) |
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 #372C6D | 12.04:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #372C6D | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #372C6D text on white | 12.04:1 | AAA | Lc 97.3 | Preferred for body text |
| #372C6D text on black | 1.74:1 | 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
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D6D5F6
oklch(88.4% 0.045 286.8)
-
Step 300
300
#BCB9F3
oklch(80.8% 0.081 286.8)
-
Step 400
400
#9C93ED
oklch(70.8% 0.13 287.2)
-
Step 500
500
#8575E7
oklch(63% 0.166 287.1)
-
Step 600
600
#705BD5
oklch(55.6% 0.18 286.9)
-
Step 700
700
#5E4AB9
oklch(49.1% 0.168 286.8)
-
Step 800
800
#4D3D96
oklch(42.7% 0.14 287.2)
-
Step 900
900 (this color)
#372C6D
oklch(34.3% 0.108 287)
-
Step 950
950
#252046
oklch(27.1% 0.069 286.9)
#372C6D 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) | #03386F | 0.061 |
| Deuteranopia (no green cones) | #03346C | 0.059 |
| Tritanopia (no blue cones) | #253B48 | 0.091 |
| Achromatopsia (no color) | #363636 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372C6D
#372C6D
oklch(34.3% 0.108 287)
- #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 #372C6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.062
- Marine Blue #01386A ΔE 0.063
- Marine #042E60 ΔE 0.067
- Midnight Blue #191970 ΔE 0.072
- Dark Slate Blue #483D8B ΔE 0.073
- Twilight Blue #0A437A ΔE 0.074
- Royal Purple #4B006E ΔE 0.078
- Indigo #4B0082 ΔE 0.079
Use #372C6D 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.