#18C6BB
Closest named color: Topaz (#13BBAF). oklch(74.6% 0.127 187.6), rgb(24, 198, 187).
Aa
Black text reads best on this color (9.83:1).
About this color
#18C6BB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.127 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.032 away. Black text reads best on it, at 9.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.83:1 |
| White text | 2.13:1 |
Values
| HEX | #18C6BB |
| RGB | rgb(24, 198, 187) |
| HSL | hsl(176, 78%, 44%) |
| OKLCH | oklch(74.6% 0.127 187.6) |
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 #18C6BB | 2.13:1 | Fails | Lc -46.0 | Large or bold text, headings |
| Black text on #18C6BB | 9.83:1 | AAA | Lc 62.6 | Content text, not long reading |
| #18C6BB text on white | 2.13:1 | Fails | Lc 41.3 | Non-text elements, placeholder text |
| #18C6BB text on black | 9.83:1 | AAA | Lc -60.9 | 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
#EEF8F7
oklch(97.1% 0.011 189.8)
-
Step 100
100
#DAEFEC
oklch(93.6% 0.022 186.5)
-
Step 200
200
#B9E3DE
oklch(88.5% 0.044 187.5)
-
Step 300
300
#82D2CA
oklch(81% 0.08 187.6)
-
Step 400
400 (this color)
#18C6BB
oklch(74.6% 0.127 187.6)
-
Step 500
500
#009E95
oklch(63% 0.11 187.7)
-
Step 600
600
#00857D
oklch(55.5% 0.097 187.4)
-
Step 700
700
#007069
oklch(49.1% 0.086 187.3)
-
Step 800
800
#005C56
oklch(42.8% 0.075 187.1)
-
Step 900
900
#004D48
oklch(37.8% 0.066 187.3)
-
Step 950
950
#002E2A
oklch(27.1% 0.048 185.8)
#18C6BB 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) | #BBBBBB | 0.135 |
| Deuteranopia (no green cones) | #A5ABBC | 0.126 |
| Tritanopia (no blue cones) | #00CBC2 | 0.014 |
| Achromatopsia (no color) | #B1B1B1 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18C6BB
#18C6BB
oklch(74.6% 0.127 187.6)
- #F0899E
#F0899E
oklch(74.6% 0.127 7.5)
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 #18C6BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.032
- Dark Turquoise #00CED1 ΔE 0.033
- Medium Turquoise #48D1CC ΔE 0.043
- Medium Aquamarine #66CDAA ΔE 0.052
- Light Sea Green #20B2AA ΔE 0.056
- Greeny Blue #42B395 ΔE 0.063
- Green Blue #01C08D ΔE 0.064
- Greenblue #23C48B ΔE 0.067
Use #18C6BB 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.