#17C4DC
Closest named color: Dark Turquoise (#00CED1). oklch(75.3% 0.128 210.6), rgb(23, 196, 220).
Aa
Black text reads best on this color (9.96:1).
About this color
#17C4DC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.128 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.037 away. Black text reads best on it, at 9.96:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 9.96:1 |
| White text | 2.10:1 |
Values
| HEX | #17C4DC |
| RGB | rgb(23, 196, 220) |
| HSL | hsl(187, 81%, 48%) |
| OKLCH | oklch(75.3% 0.128 210.6) |
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 #17C4DC | 2.10:1 | Fails | Lc -45.3 | Large or bold text, headings |
| Black text on #17C4DC | 9.96:1 | AAA | Lc 63.3 | Content text, not long reading |
| #17C4DC text on white | 2.10:1 | Fails | Lc 40.7 | Non-text elements, placeholder text |
| #17C4DC text on black | 9.96:1 | AAA | Lc -61.6 | 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
#D9EEF3
oklch(93.5% 0.023 213.6)
-
Step 200
200
#B8E2EA
oklch(88.6% 0.045 210.5)
-
Step 300
300
#81CFDE
oklch(80.9% 0.08 211.1)
-
Step 400
400 (this color)
#17C4DC
oklch(75.3% 0.128 210.6)
-
Step 500
500
#009BAE
oklch(63.2% 0.109 210)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005A66
oklch(42.9% 0.074 210.4)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#17C4DC 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) | #B0BDDD | 0.119 |
| Deuteranopia (no green cones) | #98ABDC | 0.108 |
| Tritanopia (no blue cones) | #00CECB | 0.043 |
| Achromatopsia (no color) | #B3B3B3 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17C4DC
#17C4DC
oklch(75.3% 0.128 210.6)
- #F58E7D
#F58E7D
oklch(75.2% 0.128 30.3)
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 #17C4DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.037
- Vivid Sky Blue #4CC9F0 ΔE 0.040
- Bright Sky Blue #02CCFE ΔE 0.049
- Medium Turquoise #48D1CC ΔE 0.054
- Aqua Blue #02D8E9 ΔE 0.054
- Deep Sky Blue #00BFFF ΔE 0.057
- Turquoise Blue #06B1C4 ΔE 0.058
- Topaz #13BBAF ΔE 0.065
Use #17C4DC 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.