#17C3DA
Closest named color: Dark Turquoise (#00CED1). oklch(75% 0.127 210), rgb(23, 195, 218).
Aa
Black text reads best on this color (9.85:1).
About this color
#17C3DA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.127 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.038 away. Black text reads best on it, at 9.85:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 9.85:1 |
| White text | 2.13:1 |
Values
| HEX | #17C3DA |
| RGB | rgb(23, 195, 218) |
| HSL | hsl(187, 81%, 47%) |
| OKLCH | oklch(75% 0.127 210) |
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 #17C3DA | 2.13:1 | Fails | Lc -45.8 | Large or bold text, headings |
| Black text on #17C3DA | 9.85:1 | AAA | Lc 62.7 | Content text, not long reading |
| #17C3DA text on white | 2.13:1 | Fails | Lc 41.2 | Non-text elements, placeholder text |
| #17C3DA text on black | 9.85:1 | AAA | Lc -61.0 | 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 400.
-
Step 50
50
#EEF8F9
oklch(97.2% 0.011 204.1)
-
Step 100
100
#D9EEF2
oklch(93.5% 0.023 210.4)
-
Step 200
200
#B9E2E9
oklch(88.6% 0.044 209.1)
-
Step 300
300
#81CFDD
oklch(80.9% 0.079 210.2)
-
Step 400
400 (this color)
#17C3DA
oklch(75% 0.127 210)
-
Step 500
500
#009BAE
oklch(63.2% 0.109 210)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#17C3DA 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) | #B0BBDB | 0.120 |
| Deuteranopia (no green cones) | #98AADA | 0.109 |
| Tritanopia (no blue cones) | #00CDCA | 0.042 |
| Achromatopsia (no color) | #B2B2B2 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17C3DA
#17C3DA
oklch(75% 0.127 210)
- #F38E7D
#F38E7D
oklch(75% 0.126 30.5)
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 #17C3DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.038
- Vivid Sky Blue #4CC9F0 ΔE 0.043
- Bright Sky Blue #02CCFE ΔE 0.052
- Turquoise Blue #06B1C4 ΔE 0.055
- Medium Turquoise #48D1CC ΔE 0.055
- Aqua Blue #02D8E9 ΔE 0.057
- Deep Sky Blue #00BFFF ΔE 0.059
- Topaz #13BBAF ΔE 0.062
Use #17C3DA 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.