#372D5B
Closest named color: Prussian Blue (#1D3557). oklch(33.2% 0.079 291.5), rgb(55, 45, 91).
Aa
White text reads best on this color (12.43:1).
About this color
#372D5B is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.079 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.045 away. White text reads best on it, at 12.43:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.079) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.68:1 |
| White text | 12.43:1 |
Values
| HEX | #372D5B |
| RGB | rgb(55, 45, 91) |
| HSL | hsl(253, 34%, 27%) |
| OKLCH | oklch(33.2% 0.079 291.5) |
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 #372D5B | 12.43:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #372D5B | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #372D5B text on white | 12.43:1 | AAA | Lc 98.2 | Preferred for body text |
| #372D5B text on black | 1.68:1 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#D9D6EE
oklch(88.6% 0.033 291.5)
-
Step 300
300
#C0BAE5
oklch(80.8% 0.06 291.4)
-
Step 400
400
#A196D8
oklch(70.7% 0.096 291.4)
-
Step 500
500
#8B7BCD
oklch(63.2% 0.122 291.5)
-
Step 600
600
#7562BA
oklch(55.5% 0.133 291.4)
-
Step 700
700
#6351A0
oklch(49.1% 0.123 291.7)
-
Step 800
800
#504382
oklch(42.7% 0.102 290.9)
-
Step 900
900 (this color)
#372D5B
oklch(33.2% 0.079 291.5)
-
Step 950
950
#27223D
oklch(27.1% 0.049 291.2)
#372D5B 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) | #1D355D | 0.042 |
| Deuteranopia (no green cones) | #1E335A | 0.040 |
| Tritanopia (no blue cones) | #2E363F | 0.066 |
| Achromatopsia (no color) | #343434 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372D5B
#372D5B
oklch(33.2% 0.079 291.5)
- #373900
#373900
oklch(33.1% 0.073 112)
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 #372D5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.051
- Gunmetal #293241 ΔE 0.058
- Marine #042E60 ΔE 0.063
- Dark Blue Grey #1F3B4D ΔE 0.064
- Marine Blue #01386A ΔE 0.065
- Onyx #343A40 ΔE 0.071
- Midnight Green #073B4C ΔE 0.077
Use #372D5B 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.