#523F40
Closest named color: Charcoal Grey (#3C4142). oklch(38.8% 0.027 14.8), rgb(82, 63, 64).
Aa
White text reads best on this color (9.79:1).
About this color
#523F40 is a dark close to neutral grey. In OKLCH its lightness is 39%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.038 away. White text reads best on it, at 9.79:1.
| Hue family | Neutrals |
| Lightness | dark (39%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.14:1 |
| White text | 9.79:1 |
Values
| HEX | #523F40 |
| RGB | rgb(82, 63, 64) |
| HSL | hsl(357, 13%, 28%) |
| OKLCH | oklch(38.8% 0.027 14.8) |
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 #523F40 | 9.79:1 | AAA | Lc -96.9 | Preferred for body text |
| Black text on #523F40 | 2.14:1 | Fails | Lc 11.2 | Not readable |
| #523F40 text on white | 9.79:1 | AAA | Lc 92.7 | Preferred for body text |
| #523F40 text on black | 2.14:1 | Fails | Lc -9.7 | 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
#F7F5F5
oklch(97.2% 0.002 17.2)
-
Step 100
100
#EEE8E8
oklch(93.6% 0.007 17.3)
-
Step 200
200
#E0D6D7
oklch(88.4% 0.011 10.4)
-
Step 300
300
#CDBCBC
oklch(80.9% 0.019 17.6)
-
Step 400
400
#B4999A
oklch(70.7% 0.032 15.4)
-
Step 500
500
#A18082
oklch(63.2% 0.041 14.2)
-
Step 600
600
#8B696B
oklch(55.5% 0.044 14.6)
-
Step 700
700
#765759
oklch(49% 0.041 14.4)
-
Step 800
800
#604849
oklch(42.8% 0.033 15.7)
-
Step 900
900 (this color)
#523F40
oklch(38.8% 0.027 14.8)
-
Step 950
950
#2E2324
oklch(26.9% 0.017 12.1)
#523F40 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) | #424240 | 0.029 |
| Deuteranopia (no green cones) | #464540 | 0.027 |
| Tritanopia (no blue cones) | #563D3F | 0.009 |
| Achromatopsia (no color) | #444444 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #523F40
#523F40
oklch(38.8% 0.027 14.8)
- #344949
#344949
oklch(38.8% 0.026 196.1)
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 #523F40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.038
- Purple Brown #673A3F ΔE 0.041
- Onyx #343A40 ΔE 0.056
- Dark Slate Gray #2F4F4F ΔE 0.066
- Charcoal #264653 ΔE 0.069
- Dark Grey Blue #29465B ΔE 0.072
- Brownish Purple #76424E ΔE 0.074
- Mud Brown #60460F ΔE 0.075
Use #523F40 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.