#37306E
Closest named color: Marine Blue (#01386A). oklch(35.2% 0.104 284.9), rgb(55, 48, 110).
Aa
White text reads best on this color (11.59:1).
About this color
#37306E is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.104 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.059 away. White text reads best on it, at 11.59:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.81:1 |
| White text | 11.59:1 |
Values
| HEX | #37306E |
| RGB | rgb(55, 48, 110) |
| HSL | hsl(247, 39%, 31%) |
| OKLCH | oklch(35.2% 0.104 284.9) |
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 #37306E | 11.59:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #37306E | 1.81:1 | Fails | Lc 7.4 | Not readable |
| #37306E text on white | 11.59:1 | AAA | Lc 96.5 | Preferred for body text |
| #37306E text on black | 1.81:1 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D5D6F5
oklch(88.5% 0.042 284)
-
Step 300
300
#BBBAF2
oklch(80.9% 0.079 285.3)
-
Step 400
400
#9995EB
oklch(70.8% 0.124 284.9)
-
Step 500
500
#8178E4
oklch(63.1% 0.158 284.7)
-
Step 600
600
#6C5ED2
oklch(55.6% 0.172 284.8)
-
Step 700
700
#5B4DB6
oklch(49.2% 0.16 285)
-
Step 800
800
#4A4093
oklch(42.8% 0.132 284.8)
-
Step 900
900 (this color)
#37306E
oklch(35.2% 0.104 284.9)
-
Step 950
950
#242145
oklch(27.1% 0.065 285)
#37306E 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) | #103B70 | 0.052 |
| Deuteranopia (no green cones) | #0D376D | 0.051 |
| Tritanopia (no blue cones) | #243E4A | 0.088 |
| Achromatopsia (no color) | #393939 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37306E
#37306E
oklch(35.2% 0.104 284.9)
- #413D00
#413D00
oklch(35.3% 0.075 105.5)
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 #37306E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.059
- Twilight Blue #0A437A ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.066
- Marine #042E60 ΔE 0.068
- Midnight Blue #191970 ΔE 0.080
- Dark Blue Grey #1F3B4D ΔE 0.080
- Dark Grey Blue #29465B ΔE 0.081
Use #37306E 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.