#17C5CB
Closest named color: Dark Turquoise (#00CED1). oklch(74.9% 0.125 198.8), rgb(23, 197, 203).
Aa
Black text reads best on this color (9.88:1).
About this color
#17C5CB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.125 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.024 away. Black text reads best on it, at 9.88:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 9.88:1 |
| White text | 2.12:1 |
Values
| HEX | #17C5CB |
| RGB | rgb(23, 197, 203) |
| HSL | hsl(182, 80%, 44%) |
| OKLCH | oklch(74.9% 0.125 198.8) |
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 #17C5CB | 2.12:1 | Fails | Lc -45.7 | Large or bold text, headings |
| Black text on #17C5CB | 9.88:1 | AAA | Lc 62.9 | Content text, not long reading |
| #17C5CB text on white | 2.12:1 | Fails | Lc 41.1 | Non-text elements, placeholder text |
| #17C5CB text on black | 9.88:1 | AAA | Lc -61.2 | 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
#EEF8F8
oklch(97.2% 0.011 197)
-
Step 100
100
#D9EFEF
oklch(93.6% 0.023 196.8)
-
Step 200
200
#B9E2E4
oklch(88.4% 0.043 200.1)
-
Step 300
300
#81D0D3
oklch(80.8% 0.078 198.8)
-
Step 400
400 (this color)
#17C5CB
oklch(74.9% 0.125 198.8)
-
Step 500
500
#009DA2
oklch(63.2% 0.107 198.8)
-
Step 600
600
#008488
oklch(55.7% 0.095 198.5)
-
Step 700
700
#006F72
oklch(49.2% 0.084 198.1)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#17C5CB 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) | #B6BBCC | 0.128 |
| Deuteranopia (no green cones) | #9FABCC | 0.118 |
| Tritanopia (no blue cones) | #00CDC6 | 0.026 |
| Achromatopsia (no color) | #B2B2B2 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17C5CB
#17C5CB
oklch(74.9% 0.125 198.8)
- #F28C8E
#F28C8E
oklch(74.9% 0.124 19.2)
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 #17C5CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.024
- Medium Turquoise #48D1CC ΔE 0.042
- Topaz #13BBAF ΔE 0.044
- Turquoise Blue #06B1C4 ΔE 0.057
- Aqua Blue #02D8E9 ΔE 0.059
- Vivid Sky Blue #4CC9F0 ΔE 0.061
- Light Sea Green #20B2AA ΔE 0.062
- Medium Aquamarine #66CDAA ΔE 0.068
Use #17C5CB 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.