#355F66
Closest named color: Petrol (#005F6A). oklch(45.8% 0.048 209.3), rgb(53, 95, 102).
Aa
White text reads best on this color (7.04:1).
About this color
#355F66 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 46%, its chroma 0.048 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.031 away. White text reads best on it, at 7.04:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (46%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.98:1 |
| White text | 7.04:1 |
Values
| HEX | #355F66 |
| RGB | rgb(53, 95, 102) |
| HSL | hsl(189, 32%, 30%) |
| OKLCH | oklch(45.8% 0.048 209.3) |
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 #355F66 | 7.04:1 | AAA | Lc -89.3 | Fine for body text |
| Black text on #355F66 | 2.98:1 | Fails | Lc 19.7 | Dividers and decoration only |
| #355F66 text on white | 7.04:1 | AAA | Lc 84.3 | Fine for body text |
| #355F66 text on black | 2.98:1 | Fails | Lc -17.7 | Dividers and decoration only |
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
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CEDCDF
oklch(88.5% 0.016 212)
-
Step 300
300
#ADC6CA
oklch(80.9% 0.028 208.3)
-
Step 400
400
#80A9B0
oklch(70.7% 0.045 209.1)
-
Step 500
500
#5F939C
oklch(63% 0.057 209.5)
-
Step 600
600
#437E87
oklch(55.7% 0.063 208.3)
-
Step 700
700
#356A73
oklch(49.2% 0.058 209.8)
-
Step 800
800 (this color)
#355F66
oklch(45.8% 0.048 209.3)
-
Step 900
900
#28474C
oklch(37.6% 0.038 208.8)
-
Step 950
950
#182A2D
oklch(27.1% 0.024 209.1)
#355F66 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) | #585C66 | 0.045 |
| Deuteranopia (no green cones) | #515666 | 0.043 |
| Tritanopia (no blue cones) | #1D6261 | 0.025 |
| Achromatopsia (no color) | #595959 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355F66
#355F66
oklch(45.8% 0.048 209.3)
- #704D48
#704D48
oklch(45.7% 0.049 28.2)
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 #355F66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.031
- Dark Aqua #05696B ΔE 0.037
- Dark Green Blue #1F6357 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.039
- Slate #516572 ΔE 0.045
- Deep Teal #00555A ΔE 0.054
- Dusty Grape #545775 ΔE 0.057
- Dark Slate Gray #2F4F4F ΔE 0.057
Use #355F66 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.