#216B64
Closest named color: Dark Aqua (#05696B). oklch(48.1% 0.072 186.1), rgb(33, 107, 100).
Aa
White text reads best on this color (6.26:1).
About this color
#216B64 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 48%, its chroma 0.072 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.018 away. White text reads best on it, at 6.26:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.35:1 |
| White text | 6.26:1 |
Values
| HEX | #216B64 |
| RGB | rgb(33, 107, 100) |
| HSL | hsl(174, 53%, 27%) |
| OKLCH | oklch(48.1% 0.072 186.1) |
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 #216B64 | 6.26:1 | AA | Lc -86.1 | Fine for body text |
| Black text on #216B64 | 3.35:1 | AA large text | Lc 23.1 | Dividers and decoration only |
| #216B64 text on white | 6.26:1 | AA | Lc 80.9 | Fine for body text |
| #216B64 text on black | 3.35:1 | AA large text | Lc -20.9 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CCDEDB
oklch(88.6% 0.02 184.9)
-
Step 300
300
#A8C8C4
oklch(80.8% 0.035 187.3)
-
Step 400
400
#78ACA6
oklch(70.6% 0.056 187)
-
Step 500
500
#539890
oklch(63.2% 0.071 185.9)
-
Step 600
600
#33827A
oklch(55.6% 0.078 186)
-
Step 700
700 (this color)
#216B64
oklch(48.1% 0.072 186.1)
-
Step 800
800
#215A54
oklch(42.8% 0.06 185.7)
-
Step 900
900
#214A45
oklch(37.8% 0.047 185)
-
Step 950
950
#142B29
oklch(26.9% 0.029 188.3)
#216B64 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) | #656564 | 0.076 |
| Deuteranopia (no green cones) | #5A5D65 | 0.072 |
| Tritanopia (no blue cones) | #006E69 | 0.013 |
| Achromatopsia (no color) | #606060 | 0.073 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #216B64
#216B64
oklch(48.1% 0.072 186.1)
- #804C57
#804C57
oklch(48% 0.072 6.4)
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 #216B64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.018
- Dark Aquamarine #017371 ΔE 0.027
- Dark Green Blue #1F6357 ΔE 0.029
- Deep Turquoise #017374 ΔE 0.029
- Petrol #005F6A ΔE 0.047
- Bluegreen #017A79 ΔE 0.048
- Deep Aqua #08787F ΔE 0.049
- Slate #516572 ΔE 0.059
Use #216B64 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.