#334E4B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.1% 0.033 187.2), rgb(51, 78, 75).
Aa
White text reads best on this color (9.00:1).
About this color
#334E4B is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.033 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.007 away. White text reads best on it, at 9.00:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #334E4B |
| RGB | rgb(51, 78, 75) |
| HSL | hsl(173, 21%, 25%) |
| OKLCH | oklch(40.1% 0.033 187.2) |
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 #334E4B | 9.00:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #334E4B | 2.33:1 | Fails | Lc 13.3 | Not readable |
| #334E4B text on white | 9.00:1 | AAA | Lc 90.6 | Preferred for body text |
| #334E4B text on black | 2.33:1 | Fails | Lc -11.7 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEA
oklch(93.5% 0.007 185.3)
-
Step 200
200
#D0DCDA
oklch(88.5% 0.013 185.1)
-
Step 300
300
#B0C6C3
oklch(80.9% 0.024 186.8)
-
Step 400
400
#85A9A5
oklch(70.7% 0.04 187.9)
-
Step 500
500
#66948F
oklch(63.2% 0.05 187.5)
-
Step 600
600
#4C7E79
oklch(55.6% 0.055 187.6)
-
Step 700
700
#3C6A66
oklch(49% 0.051 188.5)
-
Step 800
800
#325753
oklch(42.8% 0.043 186.9)
-
Step 900
900 (this color)
#334E4B
oklch(40.1% 0.033 187.2)
-
Step 950
950
#1A2A28
oklch(27% 0.022 186.2)
#334E4B 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) | #4B4B4B | 0.035 |
| Deuteranopia (no green cones) | #46474B | 0.034 |
| Tritanopia (no blue cones) | #2A4F4D | 0.010 |
| Achromatopsia (no color) | #494949 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334E4B
#334E4B
oklch(40.1% 0.033 187.2)
- #584145
#584145
oklch(40.2% 0.033 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 #334E4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.007
- Charcoal #264653 ΔE 0.038
- Dark Teal #014D4E ΔE 0.038
- Dark Blue Green #005249 ΔE 0.038
- Deep Teal #00555A ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.046
- Onyx #343A40 ΔE 0.063
Use #334E4B 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.