#17B9C4
Closest named color: Turquoise Blue (#06B1C4). oklch(71.7% 0.119 202.6), rgb(23, 185, 196).
Aa
Black text reads best on this color (8.77:1).
About this color
#17B9C4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 72%, its chroma 0.119 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.024 away. Black text reads best on it, at 8.77:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.77:1 |
| White text | 2.39:1 |
Values
| HEX | #17B9C4 |
| RGB | rgb(23, 185, 196) |
| HSL | hsl(184, 79%, 43%) |
| OKLCH | oklch(71.7% 0.119 202.6) |
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 #17B9C4 | 2.39:1 | Fails | Lc -51.6 | Large or bold text, headings |
| Black text on #17B9C4 | 8.77:1 | AAA | Lc 57.4 | Large or bold text, headings |
| #17B9C4 text on white | 2.39:1 | Fails | Lc 46.6 | Large or bold text, headings |
| #17B9C4 text on black | 8.77:1 | AAA | Lc -55.4 | Large or bold text, headings |
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
#DAEEF0
oklch(93.5% 0.021 204)
-
Step 200
200
#BAE2E5
oklch(88.5% 0.042 202)
-
Step 300
300
#85CFD6
oklch(80.9% 0.074 203.4)
-
Step 400
400 (this color)
#17B9C4
oklch(71.7% 0.119 202.6)
-
Step 500
500
#009CA6
oklch(63.1% 0.107 202.8)
-
Step 600
600
#00838B
oklch(55.5% 0.095 202.3)
-
Step 700
700
#006E75
oklch(49% 0.083 202.5)
-
Step 800
800
#005A60
oklch(42.6% 0.073 202.7)
-
Step 900
900
#004B50
oklch(37.6% 0.064 202.5)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#17B9C4 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) | #A9B1C5 | 0.118 |
| Deuteranopia (no green cones) | #94A1C5 | 0.110 |
| Tritanopia (no blue cones) | #00C1BC | 0.029 |
| Achromatopsia (no color) | #A7A7A7 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17B9C4
#17B9C4
oklch(71.7% 0.119 202.6)
- #E58481
#E58481
oklch(71.7% 0.12 22.4)
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 #17B9C4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.024
- Topaz #13BBAF ΔE 0.034
- Light Sea Green #20B2AA ΔE 0.038
- Dark Turquoise #00CED1 ΔE 0.058
- Greeny Blue #42B395 ΔE 0.065
- Medium Turquoise #48D1CC ΔE 0.073
- Vivid Sky Blue #4CC9F0 ΔE 0.078
- Cadet Blue #5F9EA0 ΔE 0.080
Use #17B9C4 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.