#423B63
Closest named color: Dark Grey Blue (#29465B). oklch(37.8% 0.067 290.8), rgb(66, 59, 99).
Aa
White text reads best on this color (10.30:1).
About this color
#423B63 is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.067 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.052 away. White text reads best on it, at 10.30:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.067) |
| Temperature | in between |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.03:1 |
| White text | 10.30:1 |
Values
| HEX | #423B63 |
| RGB | rgb(66, 59, 99) |
| HSL | hsl(251, 25%, 31%) |
| OKLCH | oklch(37.8% 0.067 290.8) |
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 #423B63 | 10.30:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #423B63 | 2.03:1 | Fails | Lc 10.1 | Not readable |
| #423B63 text on white | 10.30:1 | AAA | Lc 93.9 | Preferred for body text |
| #423B63 text on black | 2.03:1 | Fails | Lc -8.7 | 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
#F5F5FA
oklch(97.2% 0.007 286.3)
-
Step 100
100
#E9E8F3
oklch(93.5% 0.015 290.3)
-
Step 200
200
#D9D6EB
oklch(88.5% 0.029 292.4)
-
Step 300
300
#C0BCE0
oklch(81% 0.05 290.3)
-
Step 400
400
#A098D0
oklch(70.7% 0.081 290.7)
-
Step 500
500
#8A7EC3
oklch(63.1% 0.103 291.1)
-
Step 600
600
#7466B0
oklch(55.6% 0.113 291)
-
Step 700
700
#615597
oklch(49.1% 0.104 290.4)
-
Step 800
800
#4F457B
oklch(42.6% 0.088 290.7)
-
Step 900
900 (this color)
#423B63
oklch(37.8% 0.067 290.8)
-
Step 950
950
#26233A
oklch(27.1% 0.042 289.2)
#423B63 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) | #2F4165 | 0.032 |
| Deuteranopia (no green cones) | #304062 | 0.030 |
| Tritanopia (no blue cones) | #3A424A | 0.056 |
| Achromatopsia (no color) | #404040 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423B63
#423B63
oklch(37.8% 0.067 290.8)
- #444515
#444515
oklch(37.9% 0.068 110.4)
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 #423B63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.052
- Charcoal #264653 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.064
- Dark Blue Grey #1F3B4D ΔE 0.067
- Charcoal Grey #3C4142 ΔE 0.067
- Onyx #343A40 ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.068
- Twilight Blue #0A437A ΔE 0.069
Use #423B63 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.