#372F5B
Closest named color: Prussian Blue (#1D3557). oklch(33.6% 0.076 290.1), rgb(55, 47, 91).
Aa
White text reads best on this color (12.20:1).
About this color
#372F5B is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.076 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.042 away. White text reads best on it, at 12.20:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.076) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.72:1 |
| White text | 12.20:1 |
Values
| HEX | #372F5B |
| RGB | rgb(55, 47, 91) |
| HSL | hsl(251, 32%, 27%) |
| OKLCH | oklch(33.6% 0.076 290.1) |
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 #372F5B | 12.20:1 | AAA | Lc -101.3 | Preferred for body text |
| Black text on #372F5B | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #372F5B text on white | 12.20:1 | AAA | Lc 97.8 | Preferred for body text |
| #372F5B text on black | 1.72:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E8F4
oklch(93.5% 0.016 289.9)
-
Step 200
200
#D8D6ED
oklch(88.5% 0.031 289.7)
-
Step 300
300
#BFBBE4
oklch(80.9% 0.057 289.5)
-
Step 400
400
#9F97D6
oklch(70.7% 0.091 289.7)
-
Step 500
500
#897CCB
oklch(63.1% 0.117 290.2)
-
Step 600
600
#7364B7
oklch(55.5% 0.126 290)
-
Step 700
700
#61539E
oklch(49.2% 0.117 290)
-
Step 800
800
#4F4480
oklch(42.7% 0.097 290.1)
-
Step 900
900 (this color)
#372F5B
oklch(33.6% 0.076 290.1)
-
Step 950
950
#26223C
oklch(27% 0.048 289.9)
#372F5B 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) | #20365D | 0.038 |
| Deuteranopia (no green cones) | #20345A | 0.037 |
| Tritanopia (no blue cones) | #2E3840 | 0.064 |
| Achromatopsia (no color) | #353535 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372F5B
#372F5B
oklch(33.6% 0.076 290.1)
- #3A3A00
#3A3A00
oklch(33.7% 0.074 109.8)
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 #372F5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.050
- Gunmetal #293241 ΔE 0.056
- Dark Blue Grey #1F3B4D ΔE 0.059
- Marine Blue #01386A ΔE 0.062
- Marine #042E60 ΔE 0.063
- Onyx #343A40 ΔE 0.067
- Dark Grey Blue #29465B ΔE 0.072
Use #372F5B 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.