#18BFBC
Closest named color: Topaz (#13BBAF). oklch(72.9% 0.122 192.8), rgb(24, 191, 188).
Aa
Black text reads best on this color (9.21:1).
About this color
#18BFBC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.122 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.020 away. Black text reads best on it, at 9.21:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.21:1 |
| White text | 2.27:1 |
Values
| HEX | #18BFBC |
| RGB | rgb(24, 191, 188) |
| HSL | hsl(179, 78%, 42%) |
| OKLCH | oklch(72.9% 0.122 192.8) |
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 #18BFBC | 2.27:1 | Fails | Lc -49.2 | Large or bold text, headings |
| Black text on #18BFBC | 9.21:1 | AAA | Lc 59.6 | Large or bold text, headings |
| #18BFBC text on white | 2.27:1 | Fails | Lc 44.4 | Non-text elements, placeholder text |
| #18BFBC text on black | 9.21:1 | AAA | Lc -57.8 | Large or bold text, headings |
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
#DAEFEE
oklch(93.6% 0.022 193.3)
-
Step 200
200
#BAE3E1
oklch(88.6% 0.043 192.7)
-
Step 300
300
#84D1CE
oklch(81% 0.076 192.6)
-
Step 400
400 (this color)
#18BFBC
oklch(72.9% 0.122 192.8)
-
Step 500
500
#009E9B
oklch(63.2% 0.108 192.4)
-
Step 600
600
#008482
oklch(55.5% 0.095 192.9)
-
Step 700
700
#006F6E
oklch(49% 0.084 193.7)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#18BFBC 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) | #B2B5BC | 0.127 |
| Deuteranopia (no green cones) | #9DA5BD | 0.120 |
| Tritanopia (no blue cones) | #00C5BE | 0.016 |
| Achromatopsia (no color) | #ACACAC | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18BFBC
#18BFBC
oklch(72.9% 0.122 192.8)
- #E98692
#E98692
oklch(72.9% 0.122 12.8)
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 #18BFBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.020
- Light Sea Green #20B2AA ΔE 0.039
- Dark Turquoise #00CED1 ΔE 0.045
- Turquoise Blue #06B1C4 ΔE 0.047
- Greeny Blue #42B395 ΔE 0.055
- Medium Turquoise #48D1CC ΔE 0.058
- Medium Aquamarine #66CDAA ΔE 0.069
- Green Blue #01C08D ΔE 0.070
Use #18BFBC 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.