#423660
Closest named color: Prussian Blue (#1D3557). oklch(36.6% 0.072 295.8), rgb(66, 54, 96).
Aa
White text reads best on this color (10.89:1).
About this color
#423660 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.072 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.060 away. White text reads best on it, at 10.89:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.072) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.92:1 |
| White text | 10.89:1 |
Values
| HEX | #423660 |
| RGB | rgb(66, 54, 96) |
| HSL | hsl(257, 28%, 29%) |
| OKLCH | oklch(36.6% 0.072 295.8) |
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 #423660 | 10.89:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #423660 | 1.92:1 | Fails | Lc 8.8 | Not readable |
| #423660 text on white | 10.89:1 | AAA | Lc 95.1 | Preferred for body text |
| #423660 text on black | 1.92:1 | Fails | Lc -7.5 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EAE8F3
oklch(93.6% 0.015 294.5)
-
Step 200
200
#DAD6EB
oklch(88.6% 0.029 294.5)
-
Step 300
300
#C3BAE0
oklch(80.9% 0.054 296)
-
Step 400
400
#A596D1
oklch(70.8% 0.086 295.8)
-
Step 500
500
#8F7BC4
oklch(63.1% 0.109 295.7)
-
Step 600
600
#7A63B1
oklch(55.6% 0.12 295.9)
-
Step 700
700
#675298
oklch(49.2% 0.11 295.9)
-
Step 800
800
#54437B
oklch(42.7% 0.092 296.3)
-
Step 900
900 (this color)
#423660
oklch(36.6% 0.072 295.8)
-
Step 950
950
#28223A
oklch(27.1% 0.044 294.7)
#423660 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) | #2A3D62 | 0.040 |
| Deuteranopia (no green cones) | #2C3C5F | 0.038 |
| Tritanopia (no blue cones) | #3C3D46 | 0.057 |
| Achromatopsia (no color) | #3D3D3D | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423660
#423660
oklch(36.6% 0.072 295.8)
- #3D4310
#3D4310
oklch(36.6% 0.072 115.8)
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 #423660, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.061
- Dark Blue Grey #1F3B4D ΔE 0.067
- Onyx #343A40 ΔE 0.067
- Charcoal #264653 ΔE 0.070
- Space Cadet #2B2D42 ΔE 0.071
- Gunmetal #293241 ΔE 0.071
- Charcoal Grey #3C4142 ΔE 0.072
Use #423660 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.