#423E7D
Closest named color: Dark Slate Blue (#483D8B). oklch(40.1% 0.103 283.6), rgb(66, 62, 125).
Aa
White text reads best on this color (9.47:1).
About this color
#423E7D is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.103 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.026 away. White text reads best on it, at 9.47:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.47:1 |
Values
| HEX | #423E7D |
| RGB | rgb(66, 62, 125) |
| HSL | hsl(244, 34%, 37%) |
| OKLCH | oklch(40.1% 0.103 283.6) |
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 #423E7D | 9.47:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #423E7D | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #423E7D text on white | 9.47:1 | AAA | Lc 91.7 | Preferred for body text |
| #423E7D text on black | 2.21:1 | Fails | Lc -10.6 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E8F9
oklch(93.5% 0.023 283.3)
-
Step 200
200
#D5D6F5
oklch(88.5% 0.042 284)
-
Step 300
300
#B9BBF2
oklch(81% 0.077 282.9)
-
Step 400
400
#9795EB
oklch(70.6% 0.124 283.8)
-
Step 500
500
#7F79E5
oklch(63.2% 0.158 283.4)
-
Step 600
600
#6A5FD3
oklch(55.7% 0.172 283.6)
-
Step 700
700
#594EB6
oklch(49.2% 0.159 283.7)
-
Step 800
800
#484094
oklch(42.7% 0.133 283.5)
-
Step 900
900 (this color)
#423E7D
oklch(40.1% 0.103 283.6)
-
Step 950
950
#232145
oklch(27% 0.065 283.6)
#423E7D 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) | #23487F | 0.045 |
| Deuteranopia (no green cones) | #20447C | 0.045 |
| Tritanopia (no blue cones) | #2F4B57 | 0.088 |
| Achromatopsia (no color) | #464646 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423E7D
#423E7D
oklch(40.1% 0.103 283.6)
- #504900
#504900
oklch(40% 0.084 103.2)
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 #423E7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.026
- Blueberry #464196 ΔE 0.042
- Cobalt #1E488F ΔE 0.054
- Twilight #4E518B ΔE 0.060
- Twilight Blue #0A437A ΔE 0.060
- Light Navy #155084 ΔE 0.064
- Dusk Blue #26538D ΔE 0.065
- Dusk #4E5481 ΔE 0.067
Use #423E7D 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.