#355758
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.1% 0.04 198.2), rgb(53, 87, 88).
Aa
White text reads best on this color (7.90:1).
About this color
#355758 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.040 and its hue 198°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.028 away. White text reads best on it, at 7.90:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.65:1 |
| White text | 7.90:1 |
Values
| HEX | #355758 |
| RGB | rgb(53, 87, 88) |
| HSL | hsl(182, 25%, 28%) |
| OKLCH | oklch(43.1% 0.04 198.2) |
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 #355758 | 7.90:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #355758 | 2.65:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #355758 text on white | 7.90:1 | AAA | Lc 87.4 | Fine for body text |
| #355758 text on black | 2.65:1 | Fails | Lc -14.8 | 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
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#D0DCDC
oklch(88.5% 0.013 196.9)
-
Step 300
300
#B0C5C6
oklch(80.8% 0.023 200.2)
-
Step 400
400
#86A8A9
oklch(70.7% 0.037 198.6)
-
Step 500
500
#679394
oklch(63.2% 0.048 197.8)
-
Step 600
600
#4E7D7E
oklch(55.7% 0.051 197.5)
-
Step 700
700
#3E696B
oklch(49% 0.048 199.5)
-
Step 800
800 (this color)
#355758
oklch(43.1% 0.04 198.2)
-
Step 900
900
#2E4747
oklch(37.8% 0.031 195.9)
-
Step 950
950
#1B292A
oklch(26.9% 0.019 201.6)
#355758 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) | #535458 | 0.041 |
| Deuteranopia (no green cones) | #4C4F58 | 0.038 |
| Tritanopia (no blue cones) | #275957 | 0.015 |
| Achromatopsia (no color) | #515151 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355758
#355758
oklch(43.1% 0.04 198.2)
- #644848
#644848
oklch(43.2% 0.039 18.8)
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 #355758, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.028
- Deep Teal #00555A ΔE 0.037
- Petrol #005F6A ΔE 0.040
- Dark Green Blue #1F6357 ΔE 0.042
- Dark Blue Green #005249 ΔE 0.051
- YInMn Blue #415A77 ΔE 0.055
- Dark Teal #014D4E ΔE 0.056
- Dark Aqua #05696B ΔE 0.058
Use #355758 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.