#37316D
Closest named color: Prussian Blue (#1D3557). oklch(35.3% 0.101 284.5), rgb(55, 49, 109).
Aa
White text reads best on this color (11.52:1).
About this color
#37316D is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.101 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.057 away. White text reads best on it, at 11.52:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.82:1 |
| White text | 11.52:1 |
Values
| HEX | #37316D |
| RGB | rgb(55, 49, 109) |
| HSL | hsl(246, 38%, 31%) |
| OKLCH | oklch(35.3% 0.101 284.5) |
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 #37316D | 11.52:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #37316D | 1.82:1 | Fails | Lc 7.6 | Not readable |
| #37316D text on white | 11.52:1 | AAA | Lc 96.3 | Preferred for body text |
| #37316D text on black | 1.82:1 | 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
#D5D6F5
oklch(88.5% 0.042 284)
-
Step 300
300
#BABBF0
oklch(81% 0.074 283.8)
-
Step 400
400
#9895E9
oklch(70.6% 0.121 284.5)
-
Step 500
500
#8179E2
oklch(63.1% 0.154 284.5)
-
Step 600
600
#6C5FD0
oklch(55.6% 0.168 284.7)
-
Step 700
700
#5A4EB4
oklch(49.1% 0.156 284.4)
-
Step 800
800
#494092
oklch(42.6% 0.13 284.4)
-
Step 900
900 (this color)
#37316D
oklch(35.3% 0.101 284.5)
-
Step 950
950
#232144
oklch(27% 0.064 283.9)
#37316D 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) | #143B6F | 0.048 |
| Deuteranopia (no green cones) | #11376C | 0.048 |
| Tritanopia (no blue cones) | #253E4A | 0.085 |
| Achromatopsia (no color) | #393939 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37316D
#37316D
oklch(35.3% 0.101 284.5)
- #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 #37316D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.057
- Marine Blue #01386A ΔE 0.058
- Twilight Blue #0A437A ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.066
- Marine #042E60 ΔE 0.067
- Dark Blue Grey #1F3B4D ΔE 0.077
- Dark Grey Blue #29465B ΔE 0.078
- Space Cadet #2B2D42 ΔE 0.079
Use #37316D 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.