#372F58
Closest named color: Prussian Blue (#1D3557). oklch(33.4% 0.071 291), rgb(55, 47, 88).
Aa
White text reads best on this color (12.28:1).
About this color
#372F58 is a dark, moderately saturated purple. In OKLCH its lightness is 33%, its chroma 0.071 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 0.041 away. White text reads best on it, at 12.28:1.
| Hue family | Purples |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.071) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.70:1 |
| White text | 12.28:1 |
Values
| HEX | #372F58 |
| RGB | rgb(55, 47, 88) |
| HSL | hsl(252, 30%, 26%) |
| OKLCH | oklch(33.4% 0.071 291) |
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 #372F58 | 12.28:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #372F58 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #372F58 text on white | 12.28:1 | AAA | Lc 97.9 | Preferred for body text |
| #372F58 text on black | 1.70:1 | 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
#D9D6EC
oklch(88.5% 0.03 292)
-
Step 300
300
#C0BBE1
oklch(80.9% 0.053 291.2)
-
Step 400
400
#A097D2
oklch(70.6% 0.086 291)
-
Step 500
500
#8A7DC6
oklch(63.1% 0.109 291.1)
-
Step 600
600
#7465B3
oklch(55.6% 0.119 290.9)
-
Step 700
700
#62549A
oklch(49.2% 0.11 291)
-
Step 800
800
#50457D
oklch(42.8% 0.091 291.1)
-
Step 900
900 (this color)
#372F58
oklch(33.4% 0.071 291)
-
Step 950
950
#27223B
oklch(27% 0.046 292.2)
#372F58 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) | #22365A | 0.036 |
| Deuteranopia (no green cones) | #223457 | 0.035 |
| Tritanopia (no blue cones) | #2F373F | 0.059 |
| Achromatopsia (no color) | #353535 | 0.071 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372F58
#372F58
oklch(33.4% 0.071 291)
- #383A03
#383A03
oklch(33.5% 0.072 111.9)
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 #372F58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.045
- Gunmetal #293241 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.057
- Onyx #343A40 ΔE 0.063
- Marine #042E60 ΔE 0.064
- Marine Blue #01386A ΔE 0.064
- Midnight Green #073B4C ΔE 0.071
Use #372F58 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.