#372E87
Closest named color: Dark Slate Blue (#483D8B). oklch(36.9% 0.143 281.4), rgb(55, 46, 135).
Aa
White text reads best on this color (11.03:1).
About this color
#372E87 is a dark, vivid purple. In OKLCH its lightness is 37%, its chroma 0.143 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.050 away. White text reads best on it, at 11.03:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.90:1 |
| White text | 11.03:1 |
Values
| HEX | #372E87 |
| RGB | rgb(55, 46, 135) |
| HSL | hsl(246, 49%, 35%) |
| OKLCH | oklch(36.9% 0.143 281.4) |
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 #372E87 | 11.03:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #372E87 | 1.90:1 | Fails | Lc 8.9 | Not readable |
| #372E87 text on white | 11.03:1 | AAA | Lc 95.1 | Preferred for body text |
| #372E87 text on black | 1.90:1 | Fails | Lc -7.6 | 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
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E6E8FF
oklch(93.6% 0.031 281.8)
-
Step 200
200
#D2D5FF
oklch(88.4% 0.058 281.9)
-
Step 300
300
#B5B9FF
oklch(80.8% 0.099 281.4)
-
Step 400
400
#9192FF
oklch(70.7% 0.157 281.2)
-
Step 500
500
#7971FF
oklch(63% 0.204 281.3)
-
Step 600
600
#654FF7
oklch(55.5% 0.238 281.3)
-
Step 700
700
#553ED7
oklch(49.1% 0.221 281.4)
-
Step 800
800
#4535AE
oklch(42.7% 0.183 281.4)
-
Step 900
900 (this color)
#372E87
oklch(36.9% 0.143 281.4)
-
Step 950
950
#211E51
oklch(27.2% 0.09 281.2)
#372E87 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) | #003F8A | 0.060 |
| Deuteranopia (no green cones) | #003985 | 0.056 |
| Tritanopia (no blue cones) | #084456 | 0.121 |
| Achromatopsia (no color) | #3C3C3C | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372E87
#372E87
oklch(36.9% 0.143 281.4)
- #484000
#484000
oklch(36.8% 0.077 101.4)
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 #372E87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.050
- Blueberry #464196 ΔE 0.060
- Sapphire #2138AB ΔE 0.068
- Cobalt #1E488F ΔE 0.069
- Twilight Blue #0A437A ΔE 0.071
- Imperial Purple #480CA8 ΔE 0.072
- Indigo #4B0082 ΔE 0.074
- Indigo Blue #3A18B1 ΔE 0.074
Use #372E87 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.