#304647
Closest named color: Charcoal Grey (#3C4142). oklch(37.6% 0.027 199.6), rgb(48, 70, 71).
Aa
White text reads best on this color (10.03:1).
About this color
#304647 is a dark close to neutral grey. In OKLCH its lightness is 38%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.021 away. White text reads best on it, at 10.03:1.
| Hue family | Neutrals |
| Lightness | dark (38%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.09:1 |
| White text | 10.03:1 |
Values
| HEX | #304647 |
| RGB | rgb(48, 70, 71) |
| HSL | hsl(183, 19%, 23%) |
| OKLCH | oklch(37.6% 0.027 199.6) |
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 #304647 | 10.03:1 | AAA | Lc -97.4 | Preferred for body text |
| Black text on #304647 | 2.09:1 | Fails | Lc 10.7 | Not readable |
| #304647 text on white | 10.03:1 | AAA | Lc 93.3 | Preferred for body text |
| #304647 text on black | 2.09:1 | Fails | Lc -9.2 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B2C5C6
oklch(80.9% 0.021 200.6)
-
Step 400
400
#89A7A8
oklch(70.6% 0.033 198.9)
-
Step 500
500
#6C9293
oklch(63.2% 0.042 198.2)
-
Step 600
600
#537C7E
oklch(55.7% 0.046 199.8)
-
Step 700
700
#43686A
oklch(49% 0.042 200.2)
-
Step 800
800
#375556
oklch(42.6% 0.036 198.6)
-
Step 900
900 (this color)
#304647
oklch(37.6% 0.027 199.6)
-
Step 950
950
#1C292A
oklch(26.9% 0.018 202.1)
#304647 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) | #434447 | 0.028 |
| Deuteranopia (no green cones) | #3F4147 | 0.026 |
| Tritanopia (no blue cones) | #284846 | 0.012 |
| Achromatopsia (no color) | #424242 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304647
#304647
oklch(37.6% 0.027 199.6)
- #4F3C3B
#4F3C3B
oklch(37.7% 0.027 21.9)
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 #304647, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.021
- Charcoal #264653 ΔE 0.023
- Dark Slate Gray #2F4F4F ΔE 0.029
- Dark Grey Blue #29465B ΔE 0.035
- Dark Teal #014D4E ΔE 0.037
- Onyx #343A40 ΔE 0.038
- Dark Blue Green #005249 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.048
Use #304647 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.