#372C67
Closest named color: Prussian Blue (#1D3557). oklch(33.9% 0.099 288.5), rgb(55, 44, 103).
Aa
White text reads best on this color (12.21:1).
About this color
#372C67 is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.099 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.056 away. White text reads best on it, at 12.21:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.21:1 |
Values
| HEX | #372C67 |
| RGB | rgb(55, 44, 103) |
| HSL | hsl(251, 40%, 29%) |
| OKLCH | oklch(33.9% 0.099 288.5) |
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 #372C67 | 12.21:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #372C67 | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #372C67 text on white | 12.21:1 | AAA | Lc 97.7 | Preferred for body text |
| #372C67 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D7D5F4
oklch(88.4% 0.042 288.5)
-
Step 300
300
#BEB9EF
oklch(80.8% 0.076 288.8)
-
Step 400
400
#9E94E6
oklch(70.8% 0.118 288.6)
-
Step 500
500
#8777DF
oklch(63.1% 0.152 288.3)
-
Step 600
600
#725DCD
oklch(55.6% 0.167 288.4)
-
Step 700
700
#604CB1
oklch(49.1% 0.154 288.5)
-
Step 800
800
#4E3F8F
oklch(42.6% 0.127 288.4)
-
Step 900
900 (this color)
#372C67
oklch(33.9% 0.099 288.5)
-
Step 950
950
#262043
oklch(27% 0.064 289.3)
#372C67 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) | #0E3769 | 0.056 |
| Deuteranopia (no green cones) | #0F3466 | 0.054 |
| Tritanopia (no blue cones) | #293945 | 0.082 |
| Achromatopsia (no color) | #353535 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372C67
#372C67
oklch(33.9% 0.099 288.5)
- #3B3A00
#3B3A00
oklch(33.8% 0.073 108.7)
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 #372C67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.056
- Marine Blue #01386A ΔE 0.062
- Marine #042E60 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.071
- Midnight Blue #191970 ΔE 0.075
- Twilight Blue #0A437A ΔE 0.077
- Gunmetal #293241 ΔE 0.078
- Dark Blue Grey #1F3B4D ΔE 0.078
Use #372C67 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.