#37386C
Closest named color: Twilight Blue (#0A437A). oklch(36.7% 0.088 280.3), rgb(55, 56, 108).
Aa
White text reads best on this color (10.79:1).
About this color
#37386C is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.088 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.053 away. White text reads best on it, at 10.79:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.94:1 |
| White text | 10.79:1 |
Values
| HEX | #37386C |
| RGB | rgb(55, 56, 108) |
| HSL | hsl(239, 33%, 32%) |
| OKLCH | oklch(36.7% 0.088 280.3) |
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 #37386C | 10.79:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #37386C | 1.94:1 | Fails | Lc 9.0 | Not readable |
| #37386C text on white | 10.79:1 | AAA | Lc 94.9 | Preferred for body text |
| #37386C 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
#D4D7F2
oklch(88.5% 0.037 280.6)
-
Step 300
300
#B8BDEB
oklch(81% 0.065 280)
-
Step 400
400
#9499E1
oklch(70.7% 0.105 280.3)
-
Step 500
500
#7B7ED9
oklch(63.1% 0.135 280.3)
-
Step 600
600
#6566C6
oklch(55.7% 0.146 280.1)
-
Step 700
700
#5454AB
oklch(49.1% 0.136 280.2)
-
Step 800
800
#45458B
oklch(42.7% 0.113 280.5)
-
Step 900
900 (this color)
#37386C
oklch(36.7% 0.088 280.3)
-
Step 950
950
#212341
oklch(27% 0.055 279.1)
#37386C 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) | #233F6E | 0.031 |
| Deuteranopia (no green cones) | #1F3B6B | 0.032 |
| Tritanopia (no blue cones) | #25434C | 0.077 |
| Achromatopsia (no color) | #3D3D3D | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37386C
#37386C
oklch(36.7% 0.088 280.3)
- #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 #37386C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.054
- Marine Blue #01386A ΔE 0.055
- Dark Grey Blue #29465B ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.068
- Cobalt #1E488F ΔE 0.071
- Charcoal #264653 ΔE 0.072
Use #37386C 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.