#334F5C
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.1% 0.04 228.8), rgb(51, 79, 92).
Aa
White text reads best on this color (8.70:1).
About this color
#334F5C is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.040 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.024 away. White text reads best on it, at 8.70:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.41:1 |
| White text | 8.70:1 |
Values
| HEX | #334F5C |
| RGB | rgb(51, 79, 92) |
| HSL | hsl(199, 29%, 28%) |
| OKLCH | oklch(41.1% 0.04 228.8) |
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 #334F5C | 8.70:1 | AAA | Lc -94.3 | Preferred for body text |
| Black text on #334F5C | 2.41:1 | Fails | Lc 14.2 | Not readable |
| #334F5C text on white | 8.70:1 | AAA | Lc 89.8 | Fine for body text |
| #334F5C text on black | 2.41:1 | Fails | Lc -12.5 | 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 800.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D1DBE0
oklch(88.5% 0.013 228.9)
-
Step 300
300
#B2C4CD
oklch(80.9% 0.023 229.2)
-
Step 400
400
#89A6B3
oklch(70.8% 0.037 226.8)
-
Step 500
500
#6B90A1
oklch(63.2% 0.048 227.9)
-
Step 600
600
#537A8C
oklch(55.7% 0.052 228.5)
-
Step 700
700
#436677
oklch(49% 0.049 230)
-
Step 800
800 (this color)
#334F5C
oklch(41.1% 0.04 228.8)
-
Step 900
900
#30454F
oklch(37.7% 0.031 229)
-
Step 950
950
#1C282E
oklch(26.8% 0.02 230)
#334F5C 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) | #484E5D | 0.029 |
| Deuteranopia (no green cones) | #42495C | 0.026 |
| Tritanopia (no blue cones) | #235353 | 0.029 |
| Achromatopsia (no color) | #4B4B4B | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334F5C
#334F5C
oklch(41.1% 0.04 228.8)
- #5D4437
#5D4437
oklch(41% 0.041 48.6)
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 #334F5C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.024
- Dark Grey Blue #29465B ΔE 0.033
- Charcoal #264653 ΔE 0.036
- Deep Teal #00555A ΔE 0.039
- Dark Teal #014D4E ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.052
- Petrol #005F6A ΔE 0.053
- Dark Blue Green #005249 ΔE 0.054
Use #334F5C 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.