#423C53
Closest named color: Charcoal Grey (#3C4142). oklch(37.2% 0.04 296.4), rgb(66, 60, 83).
Aa
White text reads best on this color (10.48:1).
About this color
#423C53 is a dark, muted purple. In OKLCH its lightness is 37%, its chroma 0.040 and its hue 296°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.040 away. White text reads best on it, at 10.48:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | muted (0.040) |
| Temperature | in between |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.00:1 |
| White text | 10.48:1 |
Values
| HEX | #423C53 |
| RGB | rgb(66, 60, 83) |
| HSL | hsl(256, 16%, 28%) |
| OKLCH | oklch(37.2% 0.04 296.4) |
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 #423C53 | 10.48:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #423C53 | 2.00:1 | Fails | Lc 9.6 | Not readable |
| #423C53 text on white | 10.48:1 | AAA | Lc 94.3 | Preferred for body text |
| #423C53 text on black | 2.00:1 | Fails | Lc -8.2 | 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
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#EAE9EF
oklch(93.7% 0.008 293.9)
-
Step 200
200
#DAD7E3
oklch(88.5% 0.017 297.5)
-
Step 300
300
#C2BDD2
oklch(80.9% 0.03 296.6)
-
Step 400
400
#A39BBB
oklch(70.7% 0.047 296.6)
-
Step 500
500
#8D82AA
oklch(63.1% 0.06 297.2)
-
Step 600
600
#776B96
oklch(55.5% 0.067 297)
-
Step 700
700
#645A80
oklch(49.2% 0.061 296.2)
-
Step 800
800
#514968
oklch(42.6% 0.051 296)
-
Step 900
900 (this color)
#423C53
oklch(37.2% 0.04 296.4)
-
Step 950
950
#272431
oklch(26.9% 0.024 295.3)
#423C53 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) | #373F54 | 0.019 |
| Deuteranopia (no green cones) | #383F52 | 0.018 |
| Tritanopia (no blue cones) | #3F4044 | 0.033 |
| Achromatopsia (no color) | #3F3F3F | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423C53
#423C53
oklch(37.2% 0.04 296.4)
- #3F432B
#3F432B
oklch(37.2% 0.039 116)
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 #423C53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.040
- Onyx #343A40 ΔE 0.042
- Dark Grey Blue #29465B ΔE 0.044
- Charcoal #264653 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.054
- Gunmetal #293241 ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.063
- Dark Slate Gray #2F4F4F ΔE 0.067
Use #423C53 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.