#304F42
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.9% 0.043 165.9), rgb(48, 79, 66).
Aa
White text reads best on this color (9.04:1).
About this color
#304F42 is a dark, muted green. In OKLCH its lightness is 40%, its chroma 0.043 and its hue 166°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.022 away. White text reads best on it, at 9.04:1.
| Hue family | Greens |
| Lightness | dark (40%) |
| Chroma | muted (0.043) |
| Temperature | in between |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.32:1 |
| White text | 9.04:1 |
Values
| HEX | #304F42 |
| RGB | rgb(48, 79, 66) |
| HSL | hsl(155, 24%, 25%) |
| OKLCH | oklch(39.9% 0.043 165.9) |
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 #304F42 | 9.04:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #304F42 | 2.32:1 | Fails | Lc 13.3 | Not readable |
| #304F42 text on white | 9.04:1 | AAA | Lc 90.7 | Preferred for body text |
| #304F42 text on black | 2.32:1 | Fails | Lc -11.6 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECE8
oklch(93.6% 0.01 164.9)
-
Step 200
200
#CFDDD6
oklch(88.5% 0.018 164.6)
-
Step 300
300
#AEC8BC
oklch(81% 0.033 166)
-
Step 400
400
#82AB99
oklch(70.6% 0.052 166.2)
-
Step 500
500
#629780
oklch(63.2% 0.067 165.3)
-
Step 600
600
#47816A
oklch(55.7% 0.072 166.3)
-
Step 700
700
#386D58
oklch(49.1% 0.067 165.9)
-
Step 800
800
#2F5948
oklch(42.8% 0.056 165.8)
-
Step 900
900 (this color)
#304F42
oklch(39.9% 0.043 165.9)
-
Step 950
950
#192B23
oklch(27% 0.028 164.8)
#304F42 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) | #4E4B41 | 0.044 |
| Deuteranopia (no green cones) | #494743 | 0.043 |
| Tritanopia (no blue cones) | #284F4B | 0.016 |
| Achromatopsia (no color) | #494949 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #304F42
#304F42
oklch(39.9% 0.043 165.9)
- #593E4C
#593E4C
oklch(39.9% 0.043 346.8)
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 #304F42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.022
- Dark Blue Green #005249 ΔE 0.032
- Dark Teal #014D4E ΔE 0.039
- Deep Teal #00555A ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.048
- Charcoal #264653 ΔE 0.050
- Pine #2B5D34 ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.060
Use #304F42 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.