#372F74
Closest named color: Dark Slate Blue (#483D8B). oklch(35.5% 0.114 284.2), rgb(55, 47, 116).
Aa
White text reads best on this color (11.53:1).
About this color
#372F74 is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.114 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.061 away. White text reads best on it, at 11.53:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.82:1 |
| White text | 11.53:1 |
Values
| HEX | #372F74 |
| RGB | rgb(55, 47, 116) |
| HSL | hsl(247, 42%, 32%) |
| OKLCH | oklch(35.5% 0.114 284.2) |
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 #372F74 | 11.53:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #372F74 | 1.82:1 | Fails | Lc 7.6 | Not readable |
| #372F74 text on white | 11.53:1 | AAA | Lc 96.3 | Preferred for body text |
| #372F74 text on black | 1.82:1 | 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E7E8FA
oklch(93.6% 0.024 283.4)
-
Step 200
200
#D5D6F8
oklch(88.6% 0.047 284.1)
-
Step 300
300
#B9BAF7
oklch(81% 0.086 283.6)
-
Step 400
400
#9793F2
oklch(70.6% 0.137 284.2)
-
Step 500
500
#8075EE
oklch(63.1% 0.176 284.3)
-
Step 600
600
#6B5ADC
oklch(55.5% 0.191 284.3)
-
Step 700
700
#5A49BF
oklch(49.1% 0.177 284.3)
-
Step 800
800
#493D9A
oklch(42.7% 0.146 284.2)
-
Step 900
900 (this color)
#372F74
oklch(35.5% 0.114 284.2)
-
Step 950
950
#232048
oklch(27% 0.072 283.9)
#372F74 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) | #003B76 | 0.059 |
| Deuteranopia (no green cones) | #003773 | 0.058 |
| Tritanopia (no blue cones) | #203F4C | 0.098 |
| Achromatopsia (no color) | #393939 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #372F74
#372F74
oklch(35.5% 0.114 284.2)
- #423D00
#423D00
oklch(35.4% 0.075 104.4)
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 #372F74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.061
- Marine Blue #01386A ΔE 0.062
- Twilight Blue #0A437A ΔE 0.066
- Prussian Blue #1D3557 ΔE 0.068
- Marine #042E60 ΔE 0.072
- Blueberry #464196 ΔE 0.077
- Midnight Blue #191970 ΔE 0.077
- Cobalt #1E488F ΔE 0.079
Use #372F74 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.