#2C3F41
Closest named color: Onyx (#343A40). oklch(35.2% 0.024 204.2), rgb(44, 63, 65).
Aa
White text reads best on this color (11.08:1).
About this color
#2C3F41 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.024. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.019 away. White text reads best on it, at 11.08:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.024) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.89:1 |
| White text | 11.08:1 |
Values
| HEX | #2C3F41 |
| RGB | rgb(44, 63, 65) |
| HSL | hsl(186, 19%, 21%) |
| OKLCH | oklch(35.2% 0.024 204.2) |
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 #2C3F41 | 11.08:1 | AAA | Lc -99.4 | Preferred for body text |
| Black text on #2C3F41 | 1.89:1 | Fails | Lc 8.3 | Not readable |
| #2C3F41 text on white | 11.08:1 | AAA | Lc 95.6 | Preferred for body text |
| #2C3F41 text on black | 1.89:1 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D2DBDC
oklch(88.5% 0.01 204.9)
-
Step 300
300
#B4C4C6
oklch(80.9% 0.018 205.8)
-
Step 400
400
#8CA6A9
oklch(70.6% 0.029 205.1)
-
Step 500
500
#6F9094
oklch(63% 0.037 205.4)
-
Step 600
600
#577B7E
oklch(55.7% 0.041 202.5)
-
Step 700
700
#47676B
oklch(49.1% 0.038 205.8)
-
Step 800
800
#3A5457
oklch(42.6% 0.032 205)
-
Step 900
900 (this color)
#2C3F41
oklch(35.2% 0.024 204.2)
-
Step 950
950
#1E292A
oklch(27.1% 0.015 203.2)
#2C3F41 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) | #3C3D41 | 0.024 |
| Deuteranopia (no green cones) | #383A41 | 0.023 |
| Tritanopia (no blue cones) | #254140 | 0.011 |
| Achromatopsia (no color) | #3C3C3C | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C3F41
#2C3F41
oklch(35.2% 0.024 204.2)
- #473635
#473635
oklch(35.1% 0.025 22.3)
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 #2C3F41, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.019
- Charcoal Grey #3C4142 ΔE 0.026
- Charcoal #264653 ΔE 0.033
- Dark Blue Grey #1F3B4D ΔE 0.033
- Midnight Green #073B4C ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.044
- Gunmetal #293241 ΔE 0.045
- Dark Teal #014D4E ΔE 0.050
Use #2C3F41 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.