#372971
Closest named color: Midnight Blue (#191970). oklch(34.1% 0.119 287.3), rgb(55, 41, 113).
Aa
White text reads best on this color (12.22:1).
About this color
#372971 is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.119 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.067 away. White text reads best on it, at 12.22:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.71:1 |
| White text | 12.22:1 |
Values
| HEX | #372971 |
| RGB | rgb(55, 41, 113) |
| HSL | hsl(252, 47%, 30%) |
| OKLCH | oklch(34.1% 0.119 287.3) |
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 #372971 | 12.22:1 | AAA | Lc -101.1 | Preferred for body text |
| Black text on #372971 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #372971 text on white | 12.22:1 | AAA | Lc 97.5 | Preferred for body text |
| #372971 text on black | 1.71:1 | 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
#BCB8F8
oklch(80.8% 0.09 287.1)
-
Step 400
400
#9C91F4
oklch(70.7% 0.142 287.3)
-
Step 500
500
#8672F0
oklch(63.2% 0.182 287.3)
-
Step 600
600
#7156DE
oklch(55.5% 0.198 287.2)
-
Step 700
700
#5F45C1
oklch(49.1% 0.184 287.2)
-
Step 800
800
#4E3A9C
oklch(42.8% 0.152 287.5)
-
Step 900
900 (this color)
#372971
oklch(34.1% 0.119 287.3)
-
Step 950
950
#251F49
oklch(27.1% 0.075 286.8)
#372971 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) | #003773 | 0.064 |
| Deuteranopia (no green cones) | #003370 | 0.063 |
| Tritanopia (no blue cones) | #233A48 | 0.100 |
| Achromatopsia (no color) | #353535 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372971
#372971
oklch(34.1% 0.119 287.3)
- #3D3A00
#3D3A00
oklch(34.1% 0.073 106.4)
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 #372971, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.067
- Marine Blue #01386A ΔE 0.068
- Prussian Blue #1D3557 ΔE 0.070
- Marine #042E60 ΔE 0.070
- Indigo #4B0082 ΔE 0.071
- Royal Purple #4B006E ΔE 0.072
- Dark Slate Blue #483D8B ΔE 0.074
- Twilight Blue #0A437A ΔE 0.079
Use #372971 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.