#18CAAD
Closest named color: Medium Aquamarine (#66CDAA). oklch(75.2% 0.136 177.1), rgb(24, 202, 173).
Aa
Black text reads best on this color (10.09:1).
About this color
#18CAAD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.136 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.040 away. Black text reads best on it, at 10.09:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.09:1 |
| White text | 2.08:1 |
Values
| HEX | #18CAAD |
| RGB | rgb(24, 202, 173) |
| HSL | hsl(170, 79%, 44%) |
| OKLCH | oklch(75.2% 0.136 177.1) |
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 #18CAAD | 2.08:1 | Fails | Lc -44.6 | Non-text elements, placeholder text |
| Black text on #18CAAD | 10.09:1 | AAA | Lc 63.8 | Content text, not long reading |
| #18CAAD text on white | 2.08:1 | Fails | Lc 40.1 | Non-text elements, placeholder text |
| #18CAAD text on black | 10.09:1 | AAA | Lc -62.2 | Content text, not long reading |
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 400.
-
Step 50
50
#EEF8F5
oklch(97.1% 0.011 176.3)
-
Step 100
100
#DAF0E9
oklch(93.7% 0.025 174.7)
-
Step 200
200
#B9E4D8
oklch(88.5% 0.048 176.3)
-
Step 300
300
#82D3C0
oklch(80.9% 0.085 177.4)
-
Step 400
400 (this color)
#18CAAD
oklch(75.2% 0.136 177.1)
-
Step 500
500
#00A088
oklch(63.1% 0.117 177)
-
Step 600
600
#008772
oklch(55.7% 0.104 176.6)
-
Step 700
700
#007160
oklch(49.1% 0.091 177.4)
-
Step 800
800
#005D4E
oklch(42.8% 0.079 176.7)
-
Step 900
900
#004D41
oklch(37.6% 0.069 177.7)
-
Step 950
950
#002E26
oklch(26.9% 0.05 177.5)
#18CAAD 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) | #C2BDAC | 0.143 |
| Deuteranopia (no green cones) | #ADADAF | 0.137 |
| Tritanopia (no blue cones) | #00CDC1 | 0.027 |
| Achromatopsia (no color) | #B4B4B4 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18CAAD
#18CAAD
oklch(75.2% 0.136 177.1)
- #F288AF
#F288AF
oklch(75.2% 0.136 357.4)
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 #18CAAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.040
- Emerald #06D6A0 ΔE 0.044
- Greenblue #23C48B ΔE 0.045
- Topaz #13BBAF ΔE 0.045
- Green Blue #01C08D ΔE 0.047
- Dark Turquoise #00CED1 ΔE 0.050
- Medium Turquoise #48D1CC ΔE 0.051
- Seafoam Blue #78D1B6 ΔE 0.062
Use #18CAAD 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.