#423F69
Closest named color: Dark Grey Blue (#29465B). oklch(39% 0.07 285.9), rgb(66, 63, 105).
Aa
White text reads best on this color (9.78:1).
About this color
#423F69 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.070 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.050 away. White text reads best on it, at 9.78:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.070) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #423F69 |
| RGB | rgb(66, 63, 105) |
| HSL | hsl(244, 25%, 33%) |
| OKLCH | oklch(39% 0.07 285.9) |
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 #423F69 | 9.78:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #423F69 | 2.14:1 | Fails | Lc 11.3 | Not readable |
| #423F69 text on white | 9.78:1 | AAA | Lc 92.6 | Preferred for body text |
| #423F69 text on black | 2.14:1 | Fails | Lc -9.8 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E9F4
oklch(93.7% 0.015 286.1)
-
Step 200
200
#D7D7EC
oklch(88.6% 0.029 285.8)
-
Step 300
300
#BDBCE2
oklch(80.9% 0.053 286.3)
-
Step 400
400
#9C99D3
oklch(70.7% 0.084 286.4)
-
Step 500
500
#847FC8
oklch(63.1% 0.108 286)
-
Step 600
600
#6E67B4
oklch(55.5% 0.117 286.1)
-
Step 700
700
#5C569B
oklch(49.1% 0.108 285.7)
-
Step 800
800
#4B467E
oklch(42.6% 0.091 285.9)
-
Step 900
900 (this color)
#423F69
oklch(39% 0.07 285.9)
-
Step 950
950
#25233B
oklch(27% 0.044 286.9)
#423F69 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) | #32456B | 0.027 |
| Deuteranopia (no green cones) | #314368 | 0.027 |
| Tritanopia (no blue cones) | #38474F | 0.060 |
| Achromatopsia (no color) | #444444 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423F69
#423F69
oklch(39% 0.07 285.9)
- #4A4714
#4A4714
oklch(39% 0.07 106)
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 #423F69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.060
- Charcoal #264653 ΔE 0.063
- Twilight Blue #0A437A ΔE 0.063
- Light Navy #155084 ΔE 0.071
- Dusk #4E5481 ΔE 0.071
- Charcoal Grey #3C4142 ΔE 0.071
- Prussian Blue #1D3557 ΔE 0.071
Use #423F69 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.