#355C66
Closest named color: Petrol (#005F6A). oklch(45% 0.047 216), rgb(53, 92, 102).
Aa
White text reads best on this color (7.30:1).
About this color
#355C66 is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.047 and its hue 216°. 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 7.30:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.87:1 |
| White text | 7.30:1 |
Values
| HEX | #355C66 |
| RGB | rgb(53, 92, 102) |
| HSL | hsl(192, 32%, 30%) |
| OKLCH | oklch(45% 0.047 216) |
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 #355C66 | 7.30:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #355C66 | 2.87:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #355C66 text on white | 7.30:1 | AAA | Lc 85.3 | Fine for body text |
| #355C66 text on black | 2.87:1 | Fails | Lc -16.7 | 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
#CEDCE0
oklch(88.5% 0.016 216.7)
-
Step 300
300
#AEC5CC
oklch(80.8% 0.027 218)
-
Step 400
400
#82A8B2
oklch(70.7% 0.044 215.6)
-
Step 500
500
#61929F
oklch(63% 0.056 216.3)
-
Step 600
600
#467C8A
oklch(55.4% 0.061 216.4)
-
Step 700
700
#386975
oklch(49.1% 0.056 215.5)
-
Step 800
800 (this color)
#355C66
oklch(45% 0.047 216)
-
Step 900
900
#2A474E
oklch(37.8% 0.037 214.7)
-
Step 950
950
#19292E
oklch(26.9% 0.023 219.4)
#355C66 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) | #555A67 | 0.042 |
| Deuteranopia (no green cones) | #4D5466 | 0.037 |
| Tritanopia (no blue cones) | #1E605F | 0.028 |
| Achromatopsia (no color) | #565656 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355C66
#355C66
oklch(45% 0.047 216)
- #6D4C43
#6D4C43
oklch(45% 0.048 35.9)
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 #355C66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.031
- YInMn Blue #415A77 ΔE 0.035
- Dark Green Blue #1F6357 ΔE 0.043
- Dark Aqua #05696B ΔE 0.044
- Deep Teal #00555A ΔE 0.049
- Slate #516572 ΔE 0.050
- Dark Slate Gray #2F4F4F ΔE 0.050
- Dusty Grape #545775 ΔE 0.053
Use #355C66 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.