#37366A
Closest named color: Prussian Blue (#1D3557). oklch(36.2% 0.088 281.9), rgb(55, 54, 106).
Aa
White text reads best on this color (11.06:1).
About this color
#37366A is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.088 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.051 away. White text reads best on it, at 11.06:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.89:1 |
| White text | 11.06:1 |
Values
| HEX | #37366A |
| RGB | rgb(55, 54, 106) |
| HSL | hsl(241, 33%, 31%) |
| OKLCH | oklch(36.2% 0.088 281.9) |
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 #37366A | 11.06:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #37366A | 1.89:1 | Fails | Lc 8.4 | Not readable |
| #37366A text on white | 11.06:1 | AAA | Lc 95.5 | Preferred for body text |
| #37366A text on black | 1.89:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F7
oklch(93.7% 0.019 279.5)
-
Step 200
200
#D5D7F1
oklch(88.6% 0.036 282.1)
-
Step 300
300
#B9BCEB
oklch(80.9% 0.066 281.9)
-
Step 400
400
#9698E1
oklch(70.7% 0.106 282.1)
-
Step 500
500
#7D7DD8
oklch(63% 0.135 281.8)
-
Step 600
600
#6865C6
oklch(55.7% 0.147 281.9)
-
Step 700
700
#5653AB
oklch(49.1% 0.137 281.6)
-
Step 800
800
#47448A
oklch(42.6% 0.113 282.4)
-
Step 900
900 (this color)
#37366A
oklch(36.2% 0.088 281.9)
-
Step 950
950
#222241
oklch(26.9% 0.057 281.9)
#37366A 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) | #213E6C | 0.035 |
| Deuteranopia (no green cones) | #1E3A69 | 0.035 |
| Tritanopia (no blue cones) | #26414B | 0.076 |
| Achromatopsia (no color) | #3C3C3C | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37366A
#37366A
oklch(36.2% 0.088 281.9)
- #463E00
#463E00
oklch(36.1% 0.075 101.2)
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 #37366A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.051
- Marine Blue #01386A ΔE 0.055
- Twilight Blue #0A437A ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.065
- Dark Blue Grey #1F3B4D ΔE 0.067
- Marine #042E60 ΔE 0.070
- Charcoal #264653 ΔE 0.074
Use #37366A 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.