#37386E
Closest named color: Twilight Blue (#0A437A). oklch(36.9% 0.091 280.1), rgb(55, 56, 110).
Aa
White text reads best on this color (10.75:1).
About this color
#37386E is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.091 and its hue 280°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.052 away. White text reads best on it, at 10.75:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.95:1 |
| White text | 10.75:1 |
Values
| HEX | #37386E |
| RGB | rgb(55, 56, 110) |
| HSL | hsl(239, 33%, 32%) |
| OKLCH | oklch(36.9% 0.091 280.1) |
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 #37386E | 10.75:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #37386E | 1.95:1 | Fails | Lc 9.1 | Not readable |
| #37386E text on white | 10.75:1 | AAA | Lc 94.8 | Preferred for body text |
| #37386E text on black | 1.95:1 | Fails | Lc -7.8 | 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
#B7BCED
oklch(80.8% 0.069 280.2)
-
Step 400
400
#9399E4
oklch(70.8% 0.109 279.7)
-
Step 500
500
#7A7DDC
oklch(63% 0.141 280.2)
-
Step 600
600
#6465C9
oklch(55.6% 0.151 279.8)
-
Step 700
700
#5453AE
oklch(49.1% 0.141 280.3)
-
Step 800
800
#44448D
oklch(42.6% 0.118 280.2)
-
Step 900
900 (this color)
#37386E
oklch(36.9% 0.091 280.1)
-
Step 950
950
#212242
oklch(26.9% 0.059 280.3)
#37386E 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) | #214070 | 0.034 |
| Deuteranopia (no green cones) | #1D3C6D | 0.034 |
| Tritanopia (no blue cones) | #23434D | 0.079 |
| Achromatopsia (no color) | #3E3E3E | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37386E
#37386E
oklch(36.9% 0.091 280.1)
- #494000
#494000
oklch(36.9% 0.077 100.3)
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 #37386E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.052
- Marine Blue #01386A ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.062
- Cobalt #1E488F ΔE 0.069
- Dark Blue Grey #1F3B4D ΔE 0.071
- Marine #042E60 ΔE 0.074
Use #37386E 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.