#372A71
Closest named color: Marine Blue (#01386A). oklch(34.3% 0.117 286.9), rgb(55, 42, 113).
Aa
White text reads best on this color (12.12:1).
About this color
#372A71 is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.117 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.067 away. White text reads best on it, at 12.12:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.73:1 |
| White text | 12.12:1 |
Values
| HEX | #372A71 |
| RGB | rgb(55, 42, 113) |
| HSL | hsl(251, 46%, 30%) |
| OKLCH | oklch(34.3% 0.117 286.9) |
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 #372A71 | 12.12:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #372A71 | 1.73:1 | Fails | Lc 0.0 | Not readable |
| #372A71 text on white | 12.12:1 | AAA | Lc 97.4 | Preferred for body text |
| #372A71 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
#E8E8FB
oklch(93.7% 0.026 285.9)
-
Step 200
200
#D6D5F9
oklch(88.5% 0.049 286.6)
-
Step 300
300
#BCB8F7
oklch(80.8% 0.088 287.2)
-
Step 400
400
#9B91F3
oklch(70.6% 0.141 286.9)
-
Step 500
500
#8573EF
oklch(63.2% 0.18 286.7)
-
Step 600
600
#7057DD
oklch(55.5% 0.195 286.8)
-
Step 700
700
#5F46C0
oklch(49.1% 0.182 287.1)
-
Step 800
800
#4D3B9B
oklch(42.8% 0.15 286.9)
-
Step 900
900 (this color)
#372A71
oklch(34.3% 0.117 286.9)
-
Step 950
950
#251F48
oklch(27% 0.074 287.1)
#372A71 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) | #003873 | 0.064 |
| Deuteranopia (no green cones) | #003470 | 0.062 |
| Tritanopia (no blue cones) | #233A49 | 0.096 |
| Achromatopsia (no color) | #363636 | 0.118 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372A71
#372A71
oklch(34.3% 0.117 286.9)
- #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 #372A71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.067
- Midnight Blue #191970 ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.069
- Marine #042E60 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.072
- Indigo #4B0082 ΔE 0.072
- Royal Purple #4B006E ΔE 0.074
- Twilight Blue #0A437A ΔE 0.077
Use #372A71 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.