#304140
Closest named color: Charcoal Grey (#3C4142). oklch(36% 0.022 191.7), rgb(48, 65, 64).
Aa
White text reads best on this color (10.73:1).
About this color
#304140 is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.019 away. White text reads best on it, at 10.73:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.95:1 |
| White text | 10.73:1 |
Values
| HEX | #304140 |
| RGB | rgb(48, 65, 64) |
| HSL | hsl(176, 15%, 22%) |
| OKLCH | oklch(36% 0.022 191.7) |
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 #304140 | 10.73:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #304140 | 1.95:1 | Fails | Lc 9.0 | Not readable |
| #304140 text on white | 10.73:1 | AAA | Lc 94.9 | Preferred for body text |
| #304140 text on black | 1.95:1 | Fails | Lc -7.7 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D3DBDA
oklch(88.5% 0.009 188.1)
-
Step 300
300
#B5C4C3
oklch(80.9% 0.017 192)
-
Step 400
400
#8FA6A5
oklch(70.7% 0.026 193.4)
-
Step 500
500
#73908E
oklch(63.1% 0.033 191.2)
-
Step 600
600
#5B7A79
oklch(55.5% 0.036 193.7)
-
Step 700
700
#4A6765
oklch(49% 0.034 190.8)
-
Step 800
800
#3D5453
oklch(42.7% 0.028 192.8)
-
Step 900
900 (this color)
#304140
oklch(36% 0.022 191.7)
-
Step 950
950
#1F2928
oklch(27.1% 0.014 188.9)
#304140 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) | #3F3F40 | 0.023 |
| Deuteranopia (no green cones) | #3C3D40 | 0.022 |
| Tritanopia (no blue cones) | #2B4241 | 0.007 |
| Achromatopsia (no color) | #3E3E3E | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304140
#304140
oklch(36% 0.022 191.7)
- #48393A
#48393A
oklch(36.1% 0.021 13.7)
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 #304140, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.019
- Onyx #343A40 ΔE 0.024
- Charcoal #264653 ΔE 0.032
- Dark Blue Grey #1F3B4D ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.045
- Dark Slate Gray #2F4F4F ΔE 0.046
- Dark Teal #014D4E ΔE 0.048
- Midnight Green #073B4C ΔE 0.053
Use #304140 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.