#423E55
Closest named color: Charcoal Grey (#3C4142). oklch(37.7% 0.039 292.4), rgb(66, 62, 85).
Aa
White text reads best on this color (10.23:1).
About this color
#423E55 is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.039 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.039 away. White text reads best on it, at 10.23:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.039) |
| Temperature | in between |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.05:1 |
| White text | 10.23:1 |
Values
| HEX | #423E55 |
| RGB | rgb(66, 62, 85) |
| HSL | hsl(250, 16%, 29%) |
| OKLCH | oklch(37.7% 0.039 292.4) |
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 #423E55 | 10.23:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #423E55 | 2.05:1 | Fails | Lc 10.2 | Not readable |
| #423E55 text on white | 10.23:1 | AAA | Lc 93.8 | Preferred for body text |
| #423E55 text on black | 2.05:1 | Fails | Lc -8.8 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#EAE9EF
oklch(93.7% 0.008 293.9)
-
Step 200
200
#D9D7E3
oklch(88.4% 0.016 293.7)
-
Step 300
300
#C1BED2
oklch(81% 0.028 292.7)
-
Step 400
400
#A19CBC
oklch(70.8% 0.046 292.3)
-
Step 500
500
#8A83AB
oklch(63.1% 0.06 292.6)
-
Step 600
600
#746C97
oklch(55.5% 0.066 292.6)
-
Step 700
700
#615A81
oklch(49% 0.062 292.2)
-
Step 800
800
#4F4A68
oklch(42.6% 0.049 291.8)
-
Step 900
900 (this color)
#423E55
oklch(37.7% 0.039 292.4)
-
Step 950
950
#272432
oklch(27% 0.026 294.4)
#423E55 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) | #394156 | 0.016 |
| Deuteranopia (no green cones) | #394054 | 0.016 |
| Tritanopia (no blue cones) | #3E4246 | 0.033 |
| Achromatopsia (no color) | #414141 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423E55
#423E55
oklch(37.7% 0.039 292.4)
- #42442C
#42442C
oklch(37.8% 0.038 112.1)
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 #423E55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.040
- Onyx #343A40 ΔE 0.045
- Charcoal #264653 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.065
- Gunmetal #293241 ΔE 0.066
Use #423E55 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.