#218D77
Closest named color: Viridian (#1E9167). oklch(57.9% 0.1 175.4), rgb(33, 141, 119).
Aa
Black text reads best on this color (5.14:1).
About this color
#218D77 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.100 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.030 away. Black text reads best on it, at 5.14:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.14:1 |
| White text | 4.08:1 |
Values
| HEX | #218D77 |
| RGB | rgb(33, 141, 119) |
| HSL | hsl(168, 62%, 34%) |
| OKLCH | oklch(57.9% 0.1 175.4) |
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 #218D77 | 4.08:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #218D77 | 5.14:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #218D77 text on white | 4.08:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #218D77 text on black | 5.14:1 | AA | Lc -34.0 | 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
#E1EDE9
oklch(93.6% 0.014 174.2)
-
Step 200
200
#C9DFD8
oklch(88.5% 0.025 174.7)
-
Step 300
300
#A3CBBF
oklch(81% 0.046 174.9)
-
Step 400
400
#6EB09E
oklch(70.8% 0.073 174.9)
-
Step 500
500
#429C87
oklch(63.2% 0.092 175.4)
-
Step 600
600 (this color)
#218D77
oklch(57.9% 0.1 175.4)
-
Step 700
700
#00715E
oklch(49% 0.092 175.6)
-
Step 800
800
#0A5C4D
oklch(42.6% 0.076 176)
-
Step 900
900
#164C40
oklch(37.8% 0.06 175.3)
-
Step 950
950
#0F2C25
oklch(26.8% 0.037 175.2)
#218D77 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) | #888476 | 0.105 |
| Deuteranopia (no green cones) | #797979 | 0.100 |
| Tritanopia (no blue cones) | #008F86 | 0.022 |
| Achromatopsia (no color) | #7E7E7E | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218D77
#218D77
oklch(57.9% 0.1 175.4)
- #A8607D
#A8607D
oklch(57.9% 0.1 355)
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 #218D77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.030
- Dark Cyan #008B8B ΔE 0.034
- Dusty Teal #4C9085 ΔE 0.040
- Sea Green #2E8B57 ΔE 0.044
- Ocean Green #3D9973 ΔE 0.044
- Teal Green #0A9396 ΔE 0.045
- Blue Green #0F9B8E ΔE 0.045
- Teal #008080 ΔE 0.049
Use #218D77 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.