#303A3E
Closest named color: Onyx (#343A40). oklch(34.1% 0.015 224), rgb(48, 58, 62).
Aa
White text reads best on this color (11.66:1).
About this color
#303A3E is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.008 away. White text reads best on it, at 11.66:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.80:1 |
| White text | 11.66:1 |
Values
| HEX | #303A3E |
| RGB | rgb(48, 58, 62) |
| HSL | hsl(197, 13%, 22%) |
| OKLCH | oklch(34.1% 0.015 224) |
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 #303A3E | 11.66:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #303A3E | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #303A3E text on white | 11.66:1 | AAA | Lc 96.8 | Preferred for body text |
| #303A3E text on black | 1.80:1 | 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
#E8EAEB
oklch(93.6% 0.003 228.8)
-
Step 200
200
#D5DADC
oklch(88.5% 0.006 223.5)
-
Step 300
300
#B9C2C6
oklch(80.8% 0.011 226)
-
Step 400
400
#95A3A9
oklch(70.6% 0.018 225.3)
-
Step 500
500
#7B8D94
oklch(63.1% 0.023 223.2)
-
Step 600
600
#64777E
oklch(55.6% 0.025 222.1)
-
Step 700
700
#53646B
oklch(49.2% 0.024 224.7)
-
Step 800
800
#445157
oklch(42.6% 0.019 227.4)
-
Step 900
900 (this color)
#303A3E
oklch(34.1% 0.015 224)
-
Step 950
950
#22282A
oklch(27.2% 0.009 219.8)
#303A3E 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) | #38393E | 0.013 |
| Deuteranopia (no green cones) | #36383E | 0.011 |
| Tritanopia (no blue cones) | #2C3B3B | 0.010 |
| Achromatopsia (no color) | #383838 | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #303A3E
#303A3E
oklch(34.1% 0.015 224)
- #3F3632
#3F3632
oklch(34.1% 0.015 45.4)
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 #303A3E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.008
- Charcoal Grey #3C4142 ΔE 0.031
- Dark Blue Grey #1F3B4D ΔE 0.032
- Gunmetal #293241 ΔE 0.032
- Charcoal #264653 ΔE 0.045
- Midnight Green #073B4C ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.054
Use #303A3E 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.