#218D9A
Closest named color: Teal Green (#0A9396). oklch(59.1% 0.093 207.2), rgb(33, 141, 154).
Aa
Black text reads best on this color (5.34:1).
About this color
#218D9A is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.093 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Green (#0A9396), ΔE 0.021 away. Black text reads best on it, at 5.34:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Teal Green (#0A9396) |
| Black text | 5.34:1 |
| White text | 3.93:1 |
Values
| HEX | #218D9A |
| RGB | rgb(33, 141, 154) |
| HSL | hsl(186, 65%, 37%) |
| OKLCH | oklch(59.1% 0.093 207.2) |
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 #218D9A | 3.93:1 | AA large text | Lc -71.8 | Content text, not long reading |
| Black text on #218D9A | 5.34:1 | AA | Lc 37.8 | Non-text elements, placeholder text |
| #218D9A text on white | 3.93:1 | AA large text | Lc 66.3 | Content text, not long reading |
| #218D9A text on black | 5.34:1 | AA | Lc -35.3 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C8DEE1
oklch(88.5% 0.024 206.6)
-
Step 300
300
#A2C9CE
oklch(80.9% 0.042 206)
-
Step 400
400
#6CADB6
oklch(70.7% 0.068 206.9)
-
Step 500
500
#3E98A4
oklch(63.1% 0.086 207.3)
-
Step 600
600 (this color)
#218D9A
oklch(59.1% 0.093 207.2)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#045A63
oklch(42.8% 0.072 206.8)
-
Step 900
900
#134A51
oklch(37.8% 0.056 207.3)
-
Step 950
950
#0E2B2F
oklch(26.9% 0.035 207.5)
#218D9A 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) | #80879B | 0.090 |
| Deuteranopia (no green cones) | #707B9A | 0.083 |
| Tritanopia (no blue cones) | #009491 | 0.030 |
| Achromatopsia (no color) | #808080 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #218D9A
#218D9A
oklch(59.1% 0.093 207.2)
- #AF675F
#AF675F
oklch(59.2% 0.094 27)
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 #218D9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Green #0A9396 ΔE 0.021
- Teal Blue #01889F ΔE 0.022
- Dark Cyan #008B8B ΔE 0.026
- Blue NCS #118AB2 ΔE 0.041
- Dusty Teal #4C9085 ΔE 0.044
- Sea #3C9992 ΔE 0.046
- Blue Green #0F9B8E ΔE 0.051
- Teal #008080 ΔE 0.052
Use #218D9A 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.