#17C9DF
Closest named color: Dark Turquoise (#00CED1). oklch(76.6% 0.129 209), rgb(23, 201, 223).
Aa
Black text reads best on this color (10.45:1).
About this color
#17C9DF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.129 and its hue 209°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.029 away. Black text reads best on it, at 10.45:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 10.45:1 |
| White text | 2.00:1 |
Values
| HEX | #17C9DF |
| RGB | rgb(23, 201, 223) |
| HSL | hsl(187, 81%, 48%) |
| OKLCH | oklch(76.6% 0.129 209) |
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 #17C9DF | 2.00:1 | Fails | Lc -42.8 | Non-text elements, placeholder text |
| Black text on #17C9DF | 10.45:1 | AAA | Lc 65.6 | Content text, not long reading |
| #17C9DF text on white | 2.00:1 | Fails | Lc 38.3 | Non-text elements, placeholder text |
| #17C9DF text on black | 10.45:1 | AAA | Lc -64.0 | 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 300.
-
Step 50
50
#E9F9FC
oklch(97.1% 0.017 210.2)
-
Step 100
100
#CEF1F7
oklch(93.5% 0.037 209.1)
-
Step 200
200
#A0E7F3
oklch(88.5% 0.072 209.1)
-
Step 300
300 (this color)
#17C9DF
oklch(76.6% 0.129 209)
-
Step 400
400
#00B5C9
oklch(70.8% 0.122 208.7)
-
Step 500
500
#009BAD
oklch(63.1% 0.109 209.2)
-
Step 600
600
#008291
oklch(55.5% 0.096 208.9)
-
Step 700
700
#006D7A
oklch(49% 0.084 209.1)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#17C9DF 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) | #B5C1E0 | 0.122 |
| Deuteranopia (no green cones) | #9DAFDF | 0.112 |
| Tritanopia (no blue cones) | #00D3D0 | 0.041 |
| Achromatopsia (no color) | #B7B7B7 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17C9DF
#17C9DF
oklch(76.6% 0.129 209)
- #FA9283
#FA9283
oklch(76.6% 0.128 29.1)
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 #17C9DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.029
- Vivid Sky Blue #4CC9F0 ΔE 0.035
- Aqua Blue #02D8E9 ΔE 0.041
- Bright Sky Blue #02CCFE ΔE 0.044
- Medium Turquoise #48D1CC ΔE 0.044
- Deep Sky Blue #00BFFF ΔE 0.061
- Lightblue #7BC8F6 ΔE 0.070
- Turquoise Blue #06B1C4 ΔE 0.071
Use #17C9DF 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.