#423C55
Closest named color: Charcoal Grey (#3C4142). oklch(37.3% 0.043 295.3), rgb(66, 60, 85).
Aa
White text reads best on this color (10.45:1).
About this color
#423C55 is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.043 and its hue 295°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.043 away. White text reads best on it, at 10.45:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.043) |
| Temperature | in between |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.00:1 |
| White text | 10.45:1 |
Values
| HEX | #423C55 |
| RGB | rgb(66, 60, 85) |
| HSL | hsl(254, 17%, 28%) |
| OKLCH | oklch(37.3% 0.043 295.3) |
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 #423C55 | 10.45:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #423C55 | 2.00:1 | Fails | Lc 9.7 | Not readable |
| #423C55 text on white | 10.45:1 | AAA | Lc 94.3 | Preferred for body text |
| #423C55 text on black | 2.00:1 | Fails | Lc -8.3 | 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
#EAE9F0
oklch(93.7% 0.009 292.8)
-
Step 200
200
#DAD7E4
oklch(88.5% 0.018 296.6)
-
Step 300
300
#C2BDD4
oklch(81% 0.032 295.6)
-
Step 400
400
#A39BBE
oklch(70.8% 0.051 295.5)
-
Step 500
500
#8C82AD
oklch(63.1% 0.065 295.1)
-
Step 600
600
#766B99
oklch(55.6% 0.071 295)
-
Step 700
700
#635983
oklch(49.1% 0.067 294.7)
-
Step 800
800
#51496A
oklch(42.7% 0.055 295.1)
-
Step 900
900 (this color)
#423C55
oklch(37.3% 0.043 295.3)
-
Step 950
950
#272432
oklch(27% 0.026 294.4)
#423C55 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) | #364056 | 0.021 |
| Deuteranopia (no green cones) | #373F54 | 0.020 |
| Tritanopia (no blue cones) | #3E4045 | 0.035 |
| Achromatopsia (no color) | #3F3F3F | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423C55
#423C55
oklch(37.3% 0.043 295.3)
- #3F4329
#3F4329
oklch(37.2% 0.042 115.6)
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 #423C55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.043
- Onyx #343A40 ΔE 0.045
- Charcoal #264653 ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.062
- Gunmetal #293241 ΔE 0.063
- Dark Slate Gray #2F4F4F ΔE 0.069
Use #423C55 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.