#372A77
Closest named color: Dark Slate Blue (#483D8B). oklch(34.8% 0.126 285.6), rgb(55, 42, 119).
Aa
White text reads best on this color (11.93:1).
About this color
#372A77 is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.126 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.066 away. White text reads best on it, at 11.93:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.76:1 |
| White text | 11.93:1 |
Values
| HEX | #372A77 |
| RGB | rgb(55, 42, 119) |
| HSL | hsl(250, 48%, 32%) |
| OKLCH | oklch(34.8% 0.126 285.6) |
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 #372A77 | 11.93:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #372A77 | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #372A77 text on white | 11.93:1 | AAA | Lc 96.9 | Preferred for body text |
| #372A77 text on black | 1.76:1 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E8E8FC
oklch(93.7% 0.027 285.9)
-
Step 200
200
#D5D5FB
oklch(88.5% 0.052 285.3)
-
Step 300
300
#BAB8FB
oklch(80.8% 0.094 285.5)
-
Step 400
400
#9990FA
oklch(70.6% 0.152 285.7)
-
Step 500
500
#8371F7
oklch(63.2% 0.193 285.6)
-
Step 600
600
#6E54E6
oklch(55.6% 0.211 285.4)
-
Step 700
700
#5D43C8
oklch(49.1% 0.196 285.6)
-
Step 800
800
#4B38A1
oklch(42.6% 0.162 285.6)
-
Step 900
900 (this color)
#372A77
oklch(34.8% 0.126 285.6)
-
Step 950
950
#241E4B
oklch(26.9% 0.08 285.8)
#372A77 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) | #003979 | 0.063 |
| Deuteranopia (no green cones) | #003575 | 0.061 |
| Tritanopia (no blue cones) | #1E3C4C | 0.104 |
| Achromatopsia (no color) | #373737 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372A77
#372A77
oklch(34.8% 0.126 285.6)
- #403C00
#403C00
oklch(34.9% 0.074 105.4)
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 #372A77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.066
- Indigo #4B0082 ΔE 0.069
- Midnight Blue #191970 ΔE 0.069
- Marine Blue #01386A ΔE 0.070
- Marine #042E60 ΔE 0.075
- Royal Purple #4B006E ΔE 0.075
- Twilight Blue #0A437A ΔE 0.076
- Prussian Blue #1D3557 ΔE 0.076
Use #372A77 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.