#37316C
Closest named color: Prussian Blue (#1D3557). oklch(35.3% 0.099 284.7), rgb(55, 49, 108).
Aa
White text reads best on this color (11.54:1).
About this color
#37316C is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.099 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.056 away. White text reads best on it, at 11.54:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.81:1 |
| White text | 11.54:1 |
Values
| HEX | #37316C |
| RGB | rgb(55, 49, 108) |
| HSL | hsl(246, 38%, 31%) |
| OKLCH | oklch(35.3% 0.099 284.7) |
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 #37316C | 11.54:1 | AAA | Lc -100.1 | Preferred for body text |
| Black text on #37316C | 1.81:1 | Fails | Lc 7.5 | Not readable |
| #37316C text on white | 11.54:1 | AAA | Lc 96.4 | Preferred for body text |
| #37316C 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
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D5D6F4
oklch(88.5% 0.041 284)
-
Step 300
300
#BBBBEF
oklch(81% 0.073 284.7)
-
Step 400
400
#9995E8
oklch(70.6% 0.12 285.1)
-
Step 500
500
#8179E1
oklch(63.1% 0.153 284.6)
-
Step 600
600
#6C60CE
oklch(55.6% 0.164 284.7)
-
Step 700
700
#5A4EB3
oklch(49% 0.154 284.6)
-
Step 800
800
#4A4191
oklch(42.8% 0.127 284.8)
-
Step 900
900 (this color)
#37316C
oklch(35.3% 0.099 284.7)
-
Step 950
950
#242144
oklch(27.1% 0.064 285.2)
#37316C 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) | #153B6E | 0.047 |
| Deuteranopia (no green cones) | #13376B | 0.047 |
| Tritanopia (no blue cones) | #253E49 | 0.085 |
| Achromatopsia (no color) | #393939 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37316C
#37316C
oklch(35.3% 0.099 284.7)
- #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 #37316C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.056
- Marine Blue #01386A ΔE 0.058
- Twilight Blue #0A437A ΔE 0.064
- Marine #042E60 ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.067
- Dark Blue Grey #1F3B4D ΔE 0.076
- Dark Grey Blue #29465B ΔE 0.077
- Space Cadet #2B2D42 ΔE 0.078
Use #37316C 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.