#373568
Closest named color: Prussian Blue (#1D3557). oklch(35.8% 0.086 282.9), rgb(55, 53, 104).
Aa
White text reads best on this color (11.22:1).
About this color
#373568 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.086 and its hue 283°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.049 away. White text reads best on it, at 11.22:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.87:1 |
| White text | 11.22:1 |
Values
| HEX | #373568 |
| RGB | rgb(55, 53, 104) |
| HSL | hsl(242, 32%, 31%) |
| OKLCH | oklch(35.8% 0.086 282.9) |
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 #373568 | 11.22:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #373568 | 1.87:1 | Fails | Lc 8.1 | Not readable |
| #373568 text on white | 11.22:1 | AAA | Lc 95.8 | Preferred for body text |
| #373568 text on black | 1.87:1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E8E9F6
oklch(93.7% 0.018 282.5)
-
Step 200
200
#D5D7F1
oklch(88.6% 0.036 282.1)
-
Step 300
300
#BABCEA
oklch(80.9% 0.065 282.9)
-
Step 400
400
#9798DF
oklch(70.6% 0.103 282.8)
-
Step 500
500
#7F7DD7
oklch(63.1% 0.133 282.9)
-
Step 600
600
#6965C4
oklch(55.7% 0.144 282.6)
-
Step 700
700
#5853A9
oklch(49.1% 0.134 282.9)
-
Step 800
800
#484489
oklch(42.7% 0.111 283.2)
-
Step 900
900 (this color)
#373568
oklch(35.8% 0.086 282.9)
-
Step 950
950
#232240
oklch(26.9% 0.055 283.6)
#373568 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) | #213D6A | 0.035 |
| Deuteranopia (no green cones) | #1E3967 | 0.035 |
| Tritanopia (no blue cones) | #274049 | 0.075 |
| Achromatopsia (no color) | #3B3B3B | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #373568
#373568
oklch(35.8% 0.086 282.9)
- #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 #373568, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.049
- Marine Blue #01386A ΔE 0.055
- Twilight Blue #0A437A ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.063
- Dark Blue Grey #1F3B4D ΔE 0.065
- Marine #042E60 ΔE 0.068
- Dark Slate Blue #483D8B ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.072
Use #373568 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.