#37306F
Closest named color: Marine Blue (#01386A). oklch(35.3% 0.105 284.7), rgb(55, 48, 111).
Aa
White text reads best on this color (11.57:1).
About this color
#37306F is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.105 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 11.57:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.81:1 |
| White text | 11.57:1 |
Values
| HEX | #37306F |
| RGB | rgb(55, 48, 111) |
| HSL | hsl(247, 40%, 31%) |
| OKLCH | oklch(35.3% 0.105 284.7) |
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 #37306F | 11.57:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #37306F | 1.81:1 | Fails | Lc 7.5 | Not readable |
| #37306F text on white | 11.57:1 | AAA | Lc 96.4 | Preferred for body text |
| #37306F 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
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D5D6F6
oklch(88.5% 0.044 284)
-
Step 300
300
#BABAF2
oklch(80.8% 0.079 284.5)
-
Step 400
400
#9895EC
oklch(70.8% 0.126 284.3)
-
Step 500
500
#8178E6
oklch(63.2% 0.161 284.5)
-
Step 600
600
#6C5DD4
oklch(55.5% 0.176 284.8)
-
Step 700
700
#5A4CB8
oklch(49.1% 0.164 284.5)
-
Step 800
800
#4A3F95
oklch(42.7% 0.136 284.9)
-
Step 900
900 (this color)
#37306F
oklch(35.3% 0.105 284.7)
-
Step 950
950
#232145
oklch(27% 0.065 283.6)
#37306F 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) | #0E3B71 | 0.052 |
| Deuteranopia (no green cones) | #0B376E | 0.052 |
| Tritanopia (no blue cones) | #243E4A | 0.090 |
| Achromatopsia (no color) | #393939 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37306F
#37306F
oklch(35.3% 0.105 284.7)
- #423D00
#423D00
oklch(35.4% 0.075 104.4)
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 #37306F, 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 0.060
- Dark Slate Blue #483D8B ΔE 0.065
- Twilight Blue #0A437A ΔE 0.065
- Marine #042E60 ΔE 0.068
- Midnight Blue #191970 ΔE 0.079
- Cobalt #1E488F ΔE 0.081
- Blueberry #464196 ΔE 0.082
Use #37306F 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.