#373356
Closest named color: Prussian Blue (#1D3557). oklch(34.2% 0.061 288), rgb(55, 51, 86).
Aa
White text reads best on this color (11.86:1).
About this color
#373356 is a dark, muted purple. In OKLCH its lightness is 34%, its chroma 0.061 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.038 away. White text reads best on it, at 11.86:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | muted (0.061) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.77:1 |
| White text | 11.86:1 |
Values
| HEX | #373356 |
| RGB | rgb(55, 51, 86) |
| HSL | hsl(247, 26%, 27%) |
| OKLCH | oklch(34.2% 0.061 288) |
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 #373356 | 11.86:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #373356 | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #373356 text on white | 11.86:1 | AAA | Lc 97.2 | Preferred for body text |
| #373356 text on black | 1.77:1 | 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
#F5F5F9
oklch(97.1% 0.005 286.3)
-
Step 100
100
#E9E9F2
oklch(93.7% 0.012 286.2)
-
Step 200
200
#D8D7E9
oklch(88.5% 0.025 288.4)
-
Step 300
300
#BEBDDD
oklch(81% 0.045 286.8)
-
Step 400
400
#9E9ACC
oklch(70.8% 0.073 288.1)
-
Step 500
500
#8780BF
oklch(63.1% 0.094 288.5)
-
Step 600
600
#7169AB
oklch(55.6% 0.101 288.2)
-
Step 700
700
#5E5793
oklch(49% 0.095 287.7)
-
Step 800
800
#4D4777
oklch(42.6% 0.078 288.3)
-
Step 900
900 (this color)
#373356
oklch(34.2% 0.061 288)
-
Step 950
950
#252338
oklch(26.9% 0.039 287.9)
#373356 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) | #283857 | 0.026 |
| Deuteranopia (no green cones) | #283655 | 0.025 |
| Tritanopia (no blue cones) | #2F3940 | 0.051 |
| Achromatopsia (no color) | #373737 | 0.061 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373356
#373356
oklch(34.2% 0.061 288)
- #3C3B11
#3C3B11
oklch(34.4% 0.061 107.9)
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 #373356, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.038
- Space Cadet #2B2D42 ΔE 0.044
- Gunmetal #293241 ΔE 0.045
- Dark Blue Grey #1F3B4D ΔE 0.047
- Onyx #343A40 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.059
- Midnight Green #073B4C ΔE 0.063
- Marine Blue #01386A ΔE 0.063
Use #373356 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.