#423947
Closest named color: Onyx (#343A40). oklch(35.9% 0.027 313.5), rgb(66, 57, 71).
Aa
White text reads best on this color (11.00:1).
About this color
#423947 is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.028 away. White text reads best on it, at 11.00:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.90:1 |
| White text | 11.00:1 |
Values
| HEX | #423947 |
| RGB | rgb(66, 57, 71) |
| HSL | hsl(279, 11%, 25%) |
| OKLCH | oklch(35.9% 0.027 313.5) |
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 #423947 | 11.00:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #423947 | 1.90:1 | Fails | Lc 8.4 | Not readable |
| #423947 text on white | 11.00:1 | AAA | Lc 95.5 | Preferred for body text |
| #423947 text on black | 1.90:1 | Fails | Lc 0.0 | 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#EBE9ED
oklch(93.7% 0.006 308.4)
-
Step 200
200
#DCD7DE
oklch(88.5% 0.011 316.5)
-
Step 300
300
#C5BDCA
oklch(80.9% 0.02 312.8)
-
Step 400
400
#A89BAF
oklch(70.7% 0.032 314)
-
Step 500
500
#92839B
oklch(63.1% 0.039 312.9)
-
Step 600
600
#7D6C86
oklch(55.6% 0.044 313.9)
-
Step 700
700
#695A72
oklch(49.1% 0.042 312.7)
-
Step 800
800
#564A5C
oklch(42.8% 0.033 314.5)
-
Step 900
900 (this color)
#423947
oklch(35.9% 0.027 313.5)
-
Step 950
950
#29242C
oklch(26.9% 0.016 312.9)
#423947 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) | #373C48 | 0.020 |
| Deuteranopia (no green cones) | #393C47 | 0.017 |
| Tritanopia (no blue cones) | #423B3E | 0.019 |
| Achromatopsia (no color) | #3C3C3C | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #423947
#423947
oklch(35.9% 0.027 313.5)
- #374032
#374032
oklch(35.9% 0.026 134.4)
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 #423947, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.028
- Charcoal Grey #3C4142 ΔE 0.031
- Gunmetal #293241 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.052
- Charcoal #264653 ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.066
Use #423947 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.