#18A1CF
Closest named color: Turquoise Blue (#06B1C4). oklch(66.3% 0.125 228.1), rgb(24, 161, 207).
Aa
Black text reads best on this color (7.03:1).
About this color
#18A1CF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.125 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.053 away. Black text reads best on it, at 7.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 7.03:1 |
| White text | 2.98:1 |
Values
| HEX | #18A1CF |
| RGB | rgb(24, 161, 207) |
| HSL | hsl(195, 79%, 45%) |
| OKLCH | oklch(66.3% 0.125 228.1) |
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 #18A1CF | 2.98:1 | Fails | Lc -61.3 | Content text, not long reading |
| Black text on #18A1CF | 7.03:1 | AAA | Lc 48.1 | Large or bold text, headings |
| #18A1CF text on white | 2.98:1 | Fails | Lc 55.9 | Large or bold text, headings |
| #18A1CF text on black | 7.03:1 | AAA | Lc -45.9 | 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 500.
-
Step 50
50
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEECF3
oklch(93.5% 0.018 229)
-
Step 200
200
#C3DEEB
oklch(88.5% 0.034 228.4)
-
Step 300
300
#97C9E0
oklch(80.9% 0.061 228)
-
Step 400
400
#57ADD1
oklch(70.8% 0.098 227.9)
-
Step 500
500 (this color)
#18A1CF
oklch(66.3% 0.125 228.1)
-
Step 600
600
#007FA5
oklch(55.7% 0.108 227.8)
-
Step 700
700
#006A8B
oklch(49% 0.096 228.3)
-
Step 800
800
#005773
oklch(42.7% 0.084 228.5)
-
Step 900
900
#004960
oklch(37.8% 0.073 227.3)
-
Step 950
950
#012B3A
oklch(27% 0.052 227.6)
#18A1CF 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) | #899ED1 | 0.090 |
| Deuteranopia (no green cones) | #728ECE | 0.077 |
| Tritanopia (no blue cones) | #00AEB0 | 0.069 |
| Achromatopsia (no color) | #959595 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18A1CF
#18A1CF
oklch(66.3% 0.125 228.1)
- #D0794A
#D0794A
oklch(66.2% 0.125 47.9)
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 #18A1CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.053
- Chefchaouen Blue #4895EF ΔE 0.069
- Dark Sky Blue #448EE4 ΔE 0.070
- Faded Blue #658CBB ΔE 0.070
- Blue NCS #118AB2 ΔE 0.072
- Greyblue #77A1B5 ΔE 0.074
- Water Blue #0E87CC ΔE 0.075
- Cadet Blue #5F9EA0 ΔE 0.076
Use #18A1CF 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.