#3B6366
Closest named color: Dark Aqua (#05696B). oklch(47.1% 0.045 201.8), rgb(59, 99, 102).
Aa
White text reads best on this color (6.64:1).
About this color
#3B6366 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 47%, its chroma 0.045 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.034 away. White text reads best on it, at 6.64:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.16:1 |
| White text | 6.64:1 |
Values
| HEX | #3B6366 |
| RGB | rgb(59, 99, 102) |
| HSL | hsl(184, 27%, 32%) |
| OKLCH | oklch(47.1% 0.045 201.8) |
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 #3B6366 | 6.64:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #3B6366 | 3.16:1 | AA large text | Lc 21.3 | Dividers and decoration only |
| #3B6366 text on white | 6.64:1 | AA | Lc 82.7 | Fine for body text |
| #3B6366 text on black | 3.16:1 | AA large text | Lc -19.2 | 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 700.
-
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
#B1C5C7
oklch(80.9% 0.022 204)
-
Step 400
400
#88A8AA
oklch(70.8% 0.035 201.1)
-
Step 500
500
#699295
oklch(63.1% 0.045 201.8)
-
Step 600
600
#507C7F
oklch(55.6% 0.049 201.3)
-
Step 700
700 (this color)
#3B6366
oklch(47.1% 0.045 201.8)
-
Step 800
800
#365558
oklch(42.7% 0.037 203.6)
-
Step 900
900
#2F4648
oklch(37.6% 0.029 202.8)
-
Step 950
950
#1C292A
oklch(26.9% 0.018 202.1)
#3B6366 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) | #5E6066 | 0.046 |
| Deuteranopia (no green cones) | #565A66 | 0.043 |
| Tritanopia (no blue cones) | #286664 | 0.020 |
| Achromatopsia (no color) | #5C5C5C | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B6366
#3B6366
oklch(47.1% 0.045 201.8)
- #735150
#735150
oklch(47.1% 0.046 20.8)
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 #3B6366, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.034
- Slate #516572 ΔE 0.036
- Dark Green Blue #1F6357 ΔE 0.038
- Petrol #005F6A ΔE 0.042
- YInMn Blue #415A77 ΔE 0.046
- Deep Turquoise #017374 ΔE 0.052
- Dark Aquamarine #017371 ΔE 0.052
- Dusty Grape #545775 ΔE 0.059
Use #3B6366 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.