#423A72
Closest named color: Dark Slate Blue (#483D8B). oklch(38.5% 0.093 287.8), rgb(66, 58, 114).
Aa
White text reads best on this color (10.09:1).
About this color
#423A72 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.093 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.043 away. White text reads best on it, at 10.09:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.07:1 |
| White text | 10.09:1 |
Values
| HEX | #423A72 |
| RGB | rgb(66, 58, 114) |
| HSL | hsl(249, 33%, 34%) |
| OKLCH | oklch(38.5% 0.093 287.8) |
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 #423A72 | 10.09:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #423A72 | 2.07:1 | Fails | Lc 10.6 | Not readable |
| #423A72 text on white | 10.09:1 | AAA | Lc 93.3 | Preferred for body text |
| #423A72 text on black | 2.07:1 | Fails | Lc -9.2 | 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
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E9E8F7
oklch(93.6% 0.02 289.1)
-
Step 200
200
#D7D6F2
oklch(88.6% 0.038 287.2)
-
Step 300
300
#BDBAEC
oklch(80.8% 0.07 287.5)
-
Step 400
400
#9D95E2
oklch(70.7% 0.111 288)
-
Step 500
500
#8679DA
oklch(63.1% 0.143 287.7)
-
Step 600
600
#7160C7
oklch(55.6% 0.154 287.9)
-
Step 700
700
#5F4FAC
oklch(49.2% 0.143 287.9)
-
Step 800
800
#4D418C
oklch(42.7% 0.12 287.6)
-
Step 900
900 (this color)
#423A72
oklch(38.5% 0.093 287.8)
-
Step 950
950
#252141
oklch(27% 0.058 287.5)
#423A72 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) | #254374 | 0.045 |
| Deuteranopia (no green cones) | #244071 | 0.044 |
| Tritanopia (no blue cones) | #354550 | 0.078 |
| Achromatopsia (no color) | #424242 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423A72
#423A72
oklch(38.5% 0.093 287.8)
- #494600
#494600
oklch(38.5% 0.082 106.9)
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 #423A72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Blueberry #464196 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.063
- Cobalt #1E488F ΔE 0.068
- Dark Grey Blue #29465B ΔE 0.069
- Light Navy #155084 ΔE 0.075
- Marine Blue #01386A ΔE 0.075
- Prussian Blue #1D3557 ΔE 0.076
Use #423A72 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.