#17C5BF
Closest named color: Dark Turquoise (#00CED1). oklch(74.5% 0.125 190.9), rgb(23, 197, 191).
Aa
Black text reads best on this color (9.77:1).
About this color
#17C5BF is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.125 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.031 away. Black text reads best on it, at 9.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.125) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 9.77:1 |
| White text | 2.14:1 |
Values
| HEX | #17C5BF |
| RGB | rgb(23, 197, 191) |
| HSL | hsl(178, 79%, 43%) |
| OKLCH | oklch(74.5% 0.125 190.9) |
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 #17C5BF | 2.14:1 | Fails | Lc -46.3 | Large or bold text, headings |
| Black text on #17C5BF | 9.77:1 | AAA | Lc 62.3 | Content text, not long reading |
| #17C5BF text on white | 2.14:1 | Fails | Lc 41.6 | Non-text elements, placeholder text |
| #17C5BF text on black | 9.77:1 | AAA | Lc -60.6 | 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
#EEF8F7
oklch(97.1% 0.011 189.8)
-
Step 100
100
#DAEFED
oklch(93.6% 0.022 189.9)
-
Step 200
200
#B9E3E0
oklch(88.5% 0.044 191)
-
Step 300
300
#82D1CC
oklch(80.8% 0.078 190.6)
-
Step 400
400 (this color)
#17C5BF
oklch(74.5% 0.125 190.9)
-
Step 500
500
#009E99
oklch(63.1% 0.109 190.8)
-
Step 600
600
#008581
oklch(55.7% 0.096 191.1)
-
Step 700
700
#00706C
oklch(49.2% 0.085 190.4)
-
Step 800
800
#005B58
oklch(42.5% 0.073 190.9)
-
Step 900
900
#004C4A
oklch(37.6% 0.065 191.7)
-
Step 950
950
#002D2C
oklch(26.9% 0.046 192.5)
#17C5BF 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) | #B9BABF | 0.133 |
| Deuteranopia (no green cones) | #A3AAC0 | 0.125 |
| Tritanopia (no blue cones) | #00CBC3 | 0.016 |
| Achromatopsia (no color) | #B1B1B1 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17C5BF
#17C5BF
oklch(74.5% 0.125 190.9)
- #F08999
#F08999
oklch(74.5% 0.126 10.6)
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 #17C5BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.031
- Topaz #13BBAF ΔE 0.032
- Medium Turquoise #48D1CC ΔE 0.043
- Light Sea Green #20B2AA ΔE 0.055
- Medium Aquamarine #66CDAA ΔE 0.057
- Turquoise Blue #06B1C4 ΔE 0.062
- Greeny Blue #42B395 ΔE 0.065
- Aqua Blue #02D8E9 ΔE 0.069
Use #17C5BF 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.