#218B6F
Closest named color: Viridian (#1E9167). oklch(57.1% 0.103 170.5), rgb(33, 139, 111).
Aa
Black text reads best on this color (4.98:1).
About this color
#218B6F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 57%, its chroma 0.103 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.025 away. Black text reads best on it, at 4.98:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Viridian (#1E9167) |
| Black text | 4.98:1 |
| White text | 4.21:1 |
Values
| HEX | #218B6F |
| RGB | rgb(33, 139, 111) |
| HSL | hsl(164, 62%, 34%) |
| OKLCH | oklch(57.1% 0.103 170.5) |
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 #218B6F | 4.21:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #218B6F | 4.98:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #218B6F text on white | 4.21:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #218B6F text on black | 4.98:1 | AA | Lc -33.0 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE8
oklch(93.6% 0.013 167.2)
-
Step 200
200
#C9DFD7
oklch(88.5% 0.026 171.9)
-
Step 300
300
#A4CBBC
oklch(81% 0.046 169.7)
-
Step 400
400
#70B09A
oklch(70.7% 0.074 170.4)
-
Step 500
500
#449C81
oklch(63.1% 0.095 170.3)
-
Step 600
600 (this color)
#218B6F
oklch(57.1% 0.103 170.5)
-
Step 700
700
#047259
oklch(49.2% 0.096 170.5)
-
Step 800
800
#0E5D49
oklch(42.8% 0.079 170.6)
-
Step 900
900
#174C3D
oklch(37.7% 0.062 170.9)
-
Step 950
950
#102D24
oklch(27.2% 0.039 170.4)
#218B6F 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) | #87816E | 0.106 |
| Deuteranopia (no green cones) | #797771 | 0.101 |
| Tritanopia (no blue cones) | #008C83 | 0.029 |
| Achromatopsia (no color) | #7B7B7B | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218B6F
#218B6F
oklch(57.1% 0.103 170.5)
- #A55D80
#A55D80
oklch(57.2% 0.103 350.3)
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 #218B6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.025
- Sea Green #2E8B57 ΔE 0.034
- Dark Cyan #008B8B ΔE 0.043
- Ocean Green #3D9973 ΔE 0.048
- Dark Sage #598556 ΔE 0.048
- Dusty Teal #4C9085 ΔE 0.049
- Teal #008080 ΔE 0.051
- Light Forest Green #4F9153 ΔE 0.055
Use #218B6F 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.