#17DDF4
Closest named color: Aqua Blue (#02D8E9). oklch(82.2% 0.139 208.3), rgb(23, 221, 244).
Aa
Black text reads best on this color (12.68:1).
About this color
#17DDF4 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 82%, its chroma 0.139 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.019 away. Black text reads best on it, at 12.68:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.68:1 |
| White text | 1.65:1 |
Values
| HEX | #17DDF4 |
| RGB | rgb(23, 221, 244) |
| HSL | hsl(186, 91%, 52%) |
| OKLCH | oklch(82.2% 0.139 208.3) |
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 #17DDF4 | 1.65:1 | Fails | Lc -31.9 | Non-text elements, placeholder text |
| Black text on #17DDF4 | 12.68:1 | AAA | Lc 75.5 | Fine for body text |
| #17DDF4 text on white | 1.65:1 | Fails | Lc 28.3 | Dividers and decoration only |
| #17DDF4 text on black | 12.68:1 | AAA | Lc -74.6 | 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 300.
-
Step 50
50
#E8F9FC
oklch(97% 0.018 209.4)
-
Step 100
100
#CCF2F8
oklch(93.6% 0.04 208.1)
-
Step 200
200
#9BE8F4
oklch(88.5% 0.077 208.2)
-
Step 300
300 (this color)
#17DDF4
oklch(82.2% 0.139 208.3)
-
Step 400
400
#00B5C8
oklch(70.7% 0.122 208)
-
Step 500
500
#009BAC
oklch(63.1% 0.109 208.4)
-
Step 600
600
#008291
oklch(55.5% 0.096 208.9)
-
Step 700
700
#006E7A
oklch(49.2% 0.085 207.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#002C32
oklch(26.8% 0.046 208.8)
#17DDF4 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) | #C8D4F5 | 0.133 |
| Deuteranopia (no green cones) | #ADC1F4 | 0.121 |
| Tritanopia (no blue cones) | #00E8E4 | 0.044 |
| Achromatopsia (no color) | #C9C9C9 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17DDF4
#17DDF4
oklch(82.2% 0.139 208.3)
- #FFACA0
#FFACA0
oklch(82.2% 0.1 28.5)
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 #17DDF4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.019
- Vivid Sky Blue #4CC9F0 ΔE 0.054
- Bright Sky Blue #02CCFE ΔE 0.054
- Turquoise #40E0D0 ΔE 0.055
- Medium Turquoise #48D1CC ΔE 0.056
- Dark Turquoise #00CED1 ΔE 0.058
- Robin's Egg #6DEDFD ΔE 0.063
- Sky Blue #87CEEB ΔE 0.066
Use #17DDF4 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.