#37366D
Closest named color: Prussian Blue (#1D3557). oklch(36.4% 0.093 281.6), rgb(55, 54, 109).
Aa
White text reads best on this color (10.98:1).
About this color
#37366D is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.093 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.055 away. White text reads best on it, at 10.98:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.91:1 |
| White text | 10.98:1 |
Values
| HEX | #37366D |
| RGB | rgb(55, 54, 109) |
| HSL | hsl(241, 34%, 32%) |
| OKLCH | oklch(36.4% 0.093 281.6) |
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 #37366D | 10.98:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #37366D | 1.91:1 | Fails | Lc 8.6 | Not readable |
| #37366D text on white | 10.98:1 | AAA | Lc 95.3 | Preferred for body text |
| #37366D text on black | 1.91:1 | Fails | Lc -7.4 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D4D7F3
oklch(88.6% 0.039 280.7)
-
Step 300
300
#B8BCED
oklch(80.9% 0.069 281.1)
-
Step 400
400
#9598E4
oklch(70.7% 0.111 281.4)
-
Step 500
500
#7C7CDC
oklch(63% 0.142 281.5)
-
Step 600
600
#6763CA
oklch(55.5% 0.155 281.8)
-
Step 700
700
#5652AF
oklch(49.2% 0.144 281.7)
-
Step 800
800
#46448D
oklch(42.8% 0.118 281.4)
-
Step 900
900 (this color)
#37366D
oklch(36.4% 0.093 281.6)
-
Step 950
950
#222242
oklch(27% 0.059 281.7)
#37366D 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) | #1E3E6F | 0.037 |
| Deuteranopia (no green cones) | #1B3A6C | 0.037 |
| Tritanopia (no blue cones) | #24424C | 0.081 |
| Achromatopsia (no color) | #3C3C3C | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37366D
#37366D
oklch(36.4% 0.093 281.6)
- #473F00
#473F00
oklch(36.5% 0.076 101.3)
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 #37366D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.055
- Marine Blue #01386A ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.066
- Marine #042E60 ΔE 0.071
- Dark Blue Grey #1F3B4D ΔE 0.071
- Cobalt #1E488F ΔE 0.073
Use #37366D 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.