#373560
Closest named color: Prussian Blue (#1D3557). oklch(35.3% 0.074 284.1), rgb(55, 53, 96).
Aa
White text reads best on this color (11.40:1).
About this color
#373560 is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.074 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.042 away. White text reads best on it, at 11.40:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.84:1 |
| White text | 11.40:1 |
Values
| HEX | #373560 |
| RGB | rgb(55, 53, 96) |
| HSL | hsl(243, 29%, 29%) |
| OKLCH | oklch(35.3% 0.074 284.1) |
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 #373560 | 11.40:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #373560 | 1.84:1 | Fails | Lc 7.7 | Not readable |
| #373560 text on white | 11.40:1 | AAA | Lc 96.2 | Preferred for body text |
| #373560 text on black | 1.84:1 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E8E9F4
oklch(93.6% 0.015 281.9)
-
Step 200
200
#D6D7ED
oklch(88.5% 0.03 283.7)
-
Step 300
300
#BCBCE4
oklch(80.8% 0.056 285.1)
-
Step 400
400
#9A99D6
oklch(70.7% 0.089 284.6)
-
Step 500
500
#827FCB
oklch(63.1% 0.113 284.5)
-
Step 600
600
#6C67B8
oklch(55.6% 0.123 284.4)
-
Step 700
700
#5A569E
oklch(49.1% 0.113 284)
-
Step 800
800
#494680
oklch(42.6% 0.094 284)
-
Step 900
900 (this color)
#373560
oklch(35.3% 0.074 284.1)
-
Step 950
950
#24233C
oklch(27% 0.046 284.7)
#373560 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) | #263B62 | 0.028 |
| Deuteranopia (no green cones) | #24385F | 0.029 |
| Tritanopia (no blue cones) | #2B3D45 | 0.063 |
| Achromatopsia (no color) | #3A3A3A | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373560
#373560
oklch(35.3% 0.074 284.1)
- #423D01
#423D01
oklch(35.4% 0.074 104.3)
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 #373560, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.055
- Marine Blue #01386A ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.057
- Space Cadet #2B2D42 ΔE 0.060
- Gunmetal #293241 ΔE 0.061
- Onyx #343A40 ΔE 0.064
- Twilight Blue #0A437A ΔE 0.066
Use #373560 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.