#17C1DB
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(74.5% 0.127 212.1), rgb(23, 193, 219).
Aa
Black text reads best on this color (9.68:1).
About this color
#17C1DB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.127 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.044 away. Black text reads best on it, at 9.68:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.68:1 |
| White text | 2.16:1 |
Values
| HEX | #17C1DB |
| RGB | rgb(23, 193, 219) |
| HSL | hsl(188, 81%, 47%) |
| OKLCH | oklch(74.5% 0.127 212.1) |
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 #17C1DB | 2.16:1 | Fails | Lc -46.7 | Large or bold text, headings |
| Black text on #17C1DB | 9.68:1 | AAA | Lc 61.9 | Content text, not long reading |
| #17C1DB text on white | 2.16:1 | Fails | Lc 42.0 | Non-text elements, placeholder text |
| #17C1DB text on black | 9.68:1 | AAA | Lc -60.2 | 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
#EEF7FA
oklch(97% 0.01 219.6)
-
Step 100
100
#D9EEF3
oklch(93.5% 0.023 213.6)
-
Step 200
200
#B9E1EA
oklch(88.4% 0.044 212.9)
-
Step 300
300
#81CFDF
oklch(81% 0.08 212.1)
-
Step 400
400 (this color)
#17C1DB
oklch(74.5% 0.127 212.1)
-
Step 500
500
#009AB0
oklch(63% 0.11 212.4)
-
Step 600
600
#008294
oklch(55.7% 0.097 211.6)
-
Step 700
700
#006D7D
oklch(49.1% 0.086 212.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#004A56
oklch(37.6% 0.066 213)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#17C1DB 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) | #ADBADD | 0.117 |
| Deuteranopia (no green cones) | #95A9DB | 0.105 |
| Tritanopia (no blue cones) | #00CBC9 | 0.045 |
| Achromatopsia (no color) | #B0B0B0 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17C1DB
#17C1DB
oklch(74.5% 0.127 212.1)
- #F28D79
#F28D79
oklch(74.6% 0.127 32.1)
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 #17C1DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.044
- Dark Turquoise #00CED1 ΔE 0.044
- Turquoise Blue #06B1C4 ΔE 0.051
- Bright Sky Blue #02CCFE ΔE 0.053
- Deep Sky Blue #00BFFF ΔE 0.055
- Medium Turquoise #48D1CC ΔE 0.061
- Aqua Blue #02D8E9 ΔE 0.063
- Topaz #13BBAF ΔE 0.063
Use #17C1DB 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.