#423E51
Closest named color: Charcoal Grey (#3C4142). oklch(37.6% 0.032 294.4), rgb(66, 62, 81).
Aa
White text reads best on this color (10.29:1).
About this color
#423E51 is a dark, muted purple. In OKLCH its lightness is 38%, its chroma 0.032 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.033 away. White text reads best on it, at 10.29:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | muted (0.032) |
| Temperature | in between |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.03:1 |
| White text | 10.29:1 |
Values
| HEX | #423E51 |
| RGB | rgb(66, 62, 81) |
| HSL | hsl(253, 13%, 28%) |
| OKLCH | oklch(37.6% 0.032 294.4) |
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 #423E51 | 10.29:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #423E51 | 2.03:1 | Fails | Lc 10.0 | Not readable |
| #423E51 text on white | 10.29:1 | AAA | Lc 93.9 | Preferred for body text |
| #423E51 text on black | 2.03:1 | Fails | Lc -8.6 | 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
#F5F5F7
oklch(97.1% 0.003 286.4)
-
Step 100
100
#EAE9EE
oklch(93.6% 0.007 295.4)
-
Step 200
200
#D9D7E1
oklch(88.4% 0.014 295.3)
-
Step 300
300
#C1BECF
oklch(80.9% 0.024 294)
-
Step 400
400
#A29CB7
oklch(70.7% 0.039 295.6)
-
Step 500
500
#8B84A5
oklch(63.1% 0.05 294.7)
-
Step 600
600
#756D90
oklch(55.5% 0.054 295.1)
-
Step 700
700
#625B7B
oklch(49% 0.051 294.5)
-
Step 800
800
#504B64
oklch(42.8% 0.041 293.7)
-
Step 900
900 (this color)
#423E51
oklch(37.6% 0.032 294.4)
-
Step 950
950
#272530
oklch(27.1% 0.02 293.3)
#423E51 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) | #3A4152 | 0.015 |
| Deuteranopia (no green cones) | #3A4050 | 0.014 |
| Tritanopia (no blue cones) | #3F4144 | 0.028 |
| Achromatopsia (no color) | #404040 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423E51
#423E51
oklch(37.6% 0.032 294.4)
- #41432F
#41432F
oklch(37.5% 0.032 112.6)
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 #423E51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.033
- Onyx #343A40 ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.041
- Charcoal #264653 ΔE 0.044
- Dark Blue Grey #1F3B4D ΔE 0.054
- Dark Slate Gray #2F4F4F ΔE 0.060
- Gunmetal #293241 ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.067
Use #423E51 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.