#37386B
Closest named color: Prussian Blue (#1D3557). oklch(36.7% 0.086 280.4), rgb(55, 56, 107).
Aa
White text reads best on this color (10.82:1).
About this color
#37386B is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.086 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.053 away. White text reads best on it, at 10.82:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.94:1 |
| White text | 10.82:1 |
Values
| HEX | #37386B |
| RGB | rgb(55, 56, 107) |
| HSL | hsl(239, 32%, 32%) |
| OKLCH | oklch(36.7% 0.086 280.4) |
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 #37386B | 10.82:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #37386B | 1.94:1 | Fails | Lc 9.0 | Not readable |
| #37386B text on white | 10.82:1 | AAA | Lc 94.9 | Preferred for body text |
| #37386B text on black | 1.94:1 | Fails | Lc -7.7 | 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
#D4D7F1
oklch(88.5% 0.036 280.4)
-
Step 300
300
#B8BDEA
oklch(81% 0.064 279.9)
-
Step 400
400
#9499E0
oklch(70.7% 0.104 280.3)
-
Step 500
500
#7B7ED7
oklch(63% 0.132 280.4)
-
Step 600
600
#6566C5
oklch(55.6% 0.144 280.2)
-
Step 700
700
#5454AA
oklch(49% 0.134 280.2)
-
Step 800
800
#45458A
oklch(42.7% 0.112 280.6)
-
Step 900
900 (this color)
#37386B
oklch(36.7% 0.086 280.4)
-
Step 950
950
#222340
oklch(27.1% 0.053 280.7)
#37386B 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) | #243F6D | 0.030 |
| Deuteranopia (no green cones) | #203B6A | 0.031 |
| Tritanopia (no blue cones) | #25434C | 0.076 |
| Achromatopsia (no color) | #3D3D3D | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37386B
#37386B
oklch(36.7% 0.086 280.4)
- #483F00
#483F00
oklch(36.6% 0.076 100.2)
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 #37386B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.053
- Marine Blue #01386A ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.067
- Charcoal #264653 ΔE 0.071
- Cobalt #1E488F ΔE 0.072
Use #37386B 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.