#304339
Closest named color: Charcoal Grey (#3C4142). oklch(36.3% 0.03 161.5), rgb(48, 67, 57).
Aa
White text reads best on this color (10.56:1).
About this color
#304339 is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.027 away. White text reads best on it, at 10.56:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.98:1 |
| White text | 10.56:1 |
Values
| HEX | #304339 |
| RGB | rgb(48, 67, 57) |
| HSL | hsl(148, 17%, 23%) |
| OKLCH | oklch(36.3% 0.03 161.5) |
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 #304339 | 10.56:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #304339 | 1.98:1 | Fails | Lc 9.4 | Not readable |
| #304339 text on white | 10.56:1 | AAA | Lc 94.5 | Preferred for body text |
| #304339 text on black | 1.98:1 | Fails | Lc -8.1 | 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
#F4F6F5
oklch(97.1% 0.002 165.1)
-
Step 100
100
#E6EBE8
oklch(93.5% 0.007 160.1)
-
Step 200
200
#D2DCD6
oklch(88.5% 0.013 159.9)
-
Step 300
300
#B5C5BC
oklch(80.9% 0.021 161.3)
-
Step 400
400
#8EA89A
oklch(70.8% 0.035 161.9)
-
Step 500
500
#719281
oklch(63% 0.045 162.4)
-
Step 600
600
#597D6A
oklch(55.7% 0.05 161.2)
-
Step 700
700
#496958
oklch(49.1% 0.046 160.9)
-
Step 800
800
#3C5648
oklch(42.8% 0.039 160.6)
-
Step 900
900 (this color)
#304339
oklch(36.3% 0.03 161.5)
-
Step 950
950
#1E2924
oklch(26.9% 0.018 165.6)
#304339 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) | #424038 | 0.028 |
| Deuteranopia (no green cones) | #3F3E3A | 0.028 |
| Tritanopia (no blue cones) | #2C4340 | 0.012 |
| Achromatopsia (no color) | #3F3F3F | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304339
#304339
oklch(36.3% 0.03 161.5)
- #493842
#493842
oklch(36.3% 0.029 342.5)
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 #304339, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.027
- Onyx #343A40 ΔE 0.037
- Charcoal #264653 ΔE 0.043
- Dark Slate Gray #2F4F4F ΔE 0.045
- Dark Teal #014D4E ΔE 0.047
- Evergreen #05472A ΔE 0.051
- Dark Blue Green #005249 ΔE 0.053
- Dark Blue Grey #1F3B4D ΔE 0.055
Use #304339 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.