#355659
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.9% 0.039 203.1), rgb(53, 86, 89).
Aa
White text reads best on this color (7.99:1).
About this color
#355659 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.039 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.027 away. White text reads best on it, at 7.99:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.62:1 |
| White text | 7.99:1 |
Values
| HEX | #355659 |
| RGB | rgb(53, 86, 89) |
| HSL | hsl(185, 25%, 28%) |
| OKLCH | oklch(42.9% 0.039 203.1) |
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 #355659 | 7.99:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #355659 | 2.62:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #355659 text on white | 7.99:1 | AAA | Lc 87.6 | Fine for body text |
| #355659 text on black | 2.62:1 | Fails | Lc -14.5 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D0DCDD
oklch(88.6% 0.013 202.9)
-
Step 300
300
#B1C5C7
oklch(80.9% 0.022 204)
-
Step 400
400
#87A8AB
oklch(70.8% 0.036 203.2)
-
Step 500
500
#689296
oklch(63.1% 0.046 203.5)
-
Step 600
600
#4F7C80
oklch(55.5% 0.05 203)
-
Step 700
700
#3F696D
oklch(49.2% 0.047 203.5)
-
Step 800
800 (this color)
#355659
oklch(42.9% 0.039 203.1)
-
Step 900
900
#2E4649
oklch(37.6% 0.03 205.8)
-
Step 950
950
#1B292B
oklch(26.9% 0.019 207.1)
#355659 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) | #515359 | 0.039 |
| Deuteranopia (no green cones) | #4B4F59 | 0.035 |
| Tritanopia (no blue cones) | #265857 | 0.017 |
| Achromatopsia (no color) | #515151 | 0.039 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355659
#355659
oklch(42.9% 0.039 203.1)
- #634745
#634745
oklch(42.8% 0.039 23.4)
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 #355659, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.027
- Deep Teal #00555A ΔE 0.037
- Petrol #005F6A ΔE 0.041
- Dark Green Blue #1F6357 ΔE 0.046
- Dark Blue Green #005249 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.053
- Dark Teal #014D4E ΔE 0.055
- Charcoal #264653 ΔE 0.056
Use #355659 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.