#37336D
Closest named color: Prussian Blue (#1D3557). oklch(35.7% 0.097 283.4), rgb(55, 51, 109).
Aa
White text reads best on this color (11.30:1).
About this color
#37336D is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.097 and its hue 283°. 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 11.30:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.85:1 |
| White text | 11.30:1 |
Values
| HEX | #37336D |
| RGB | rgb(55, 51, 109) |
| HSL | hsl(244, 36%, 31%) |
| OKLCH | oklch(35.7% 0.097 283.4) |
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 #37336D | 11.30:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #37336D | 1.85:1 | Fails | Lc 8.0 | Not readable |
| #37336D text on white | 11.30:1 | AAA | Lc 95.9 | Preferred for body text |
| #37336D text on black | 1.85:1 | 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
#E7E8F8
oklch(93.5% 0.022 283.1)
-
Step 200
200
#D5D6F4
oklch(88.5% 0.041 284)
-
Step 300
300
#BABBEF
oklch(80.9% 0.073 283.8)
-
Step 400
400
#9796E7
oklch(70.6% 0.117 283.5)
-
Step 500
500
#7F7AE0
oklch(63.1% 0.15 283.4)
-
Step 600
600
#6A61CE
oklch(55.7% 0.163 283.5)
-
Step 700
700
#584FB2
oklch(49% 0.152 283.4)
-
Step 800
800
#484290
oklch(42.8% 0.125 283.3)
-
Step 900
900 (this color)
#37336D
oklch(35.7% 0.097 283.4)
-
Step 950
950
#232143
oklch(26.9% 0.062 284.1)
#37336D 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) | #183C6F | 0.043 |
| Deuteranopia (no green cones) | #15386C | 0.044 |
| Tritanopia (no blue cones) | #253F4B | 0.082 |
| Achromatopsia (no color) | #3A3A3A | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37336D
#37336D
oklch(35.7% 0.097 283.4)
- #443E00
#443E00
oklch(35.9% 0.076 103.4)
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 #37336D, 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 0.056
- Twilight Blue #0A437A ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.063
- Marine #042E60 ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.073
- Dark Blue Grey #1F3B4D ΔE 0.075
- Cobalt #1E488F ΔE 0.078
Use #37336D 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.