#423665
Closest named color: Prussian Blue (#1D3557). oklch(36.9% 0.08 293.9), rgb(66, 54, 101).
Aa
White text reads best on this color (10.78:1).
About this color
#423665 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.080 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.063 away. White text reads best on it, at 10.78:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.94:1 |
| White text | 10.78:1 |
Values
| HEX | #423665 |
| RGB | rgb(66, 54, 101) |
| HSL | hsl(255, 30%, 30%) |
| OKLCH | oklch(36.9% 0.08 293.9) |
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 #423665 | 10.78:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #423665 | 1.94:1 | Fails | Lc 9.0 | Not readable |
| #423665 text on white | 10.78:1 | AAA | Lc 94.9 | Preferred for body text |
| #423665 text on black | 1.94:1 | Fails | Lc -7.7 | 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
#F5F4FA
oklch(97% 0.008 293.9)
-
Step 100
100
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#DAD5EE
oklch(88.5% 0.034 294.9)
-
Step 300
300
#C2BAE4
oklch(80.9% 0.059 293.8)
-
Step 400
400
#A395D7
oklch(70.7% 0.096 293.5)
-
Step 500
500
#8E7ACC
oklch(63.2% 0.122 293.8)
-
Step 600
600
#7861B9
oklch(55.5% 0.134 293.6)
-
Step 700
700
#65509F
oklch(49% 0.123 293.6)
-
Step 800
800
#534281
oklch(42.8% 0.102 294.1)
-
Step 900
900 (this color)
#423665
oklch(36.9% 0.08 293.9)
-
Step 950
950
#28213D
oklch(27% 0.052 294.2)
#423665 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) | #273E67 | 0.044 |
| Deuteranopia (no green cones) | #293D64 | 0.042 |
| Tritanopia (no blue cones) | #3A3F48 | 0.066 |
| Achromatopsia (no color) | #3D3D3D | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423665
#423665
oklch(36.9% 0.08 293.9)
- #3F4405
#3F4405
oklch(37% 0.08 114.5)
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 #423665, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.063
- Dark Grey Blue #29465B ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.066
- Dark Blue Grey #1F3B4D ΔE 0.072
- Twilight Blue #0A437A ΔE 0.072
- Marine Blue #01386A ΔE 0.074
- Onyx #343A40 ΔE 0.075
- Charcoal #264653 ΔE 0.075
Use #423665 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.