#334E55
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.5% 0.035 215.8), rgb(51, 78, 85).
Aa
White text reads best on this color (8.89:1).
About this color
#334E55 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.035 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.013 away. White text reads best on it, at 8.89:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.36:1 |
| White text | 8.89:1 |
Values
| HEX | #334E55 |
| RGB | rgb(51, 78, 85) |
| HSL | hsl(192, 25%, 27%) |
| OKLCH | oklch(40.5% 0.035 215.8) |
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 #334E55 | 8.89:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #334E55 | 2.36:1 | Fails | Lc 13.6 | Not readable |
| #334E55 text on white | 8.89:1 | AAA | Lc 90.3 | Preferred for body text |
| #334E55 text on black | 2.36:1 | Fails | Lc -12.0 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D1DBDE
oklch(88.5% 0.012 217.6)
-
Step 300
300
#B3C4C9
oklch(80.9% 0.02 217.3)
-
Step 400
400
#8BA6AD
oklch(70.7% 0.032 215.2)
-
Step 500
500
#6D9099
oklch(63% 0.041 215.3)
-
Step 600
600
#557A84
oklch(55.5% 0.044 216.4)
-
Step 700
700
#456770
oklch(49.1% 0.042 216.1)
-
Step 800
800 (this color)
#334E55
oklch(40.5% 0.035 215.8)
-
Step 900
900
#31454B
oklch(37.6% 0.027 218.3)
-
Step 950
950
#1D292C
oklch(27.1% 0.017 214.8)
#334E55 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) | #494C55 | 0.031 |
| Deuteranopia (no green cones) | #444855 | 0.029 |
| Tritanopia (no blue cones) | #265150 | 0.021 |
| Achromatopsia (no color) | #4A4A4A | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #334E55
#334E55
oklch(40.5% 0.035 215.8)
- #5A433C
#5A433C
oklch(40.6% 0.034 37.6)
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 #334E55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.013
- Charcoal #264653 ΔE 0.032
- Dark Grey Blue #29465B ΔE 0.034
- Deep Teal #00555A ΔE 0.037
- Dark Teal #014D4E ΔE 0.042
- Charcoal Grey #3C4142 ΔE 0.044
- Dark Blue Green #005249 ΔE 0.047
- Petrol #005F6A ΔE 0.058
Use #334E55 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.