#17CFFF
Closest named color: Bright Sky Blue (#02CCFE). oklch(79.4% 0.145 222.9), rgb(23, 207, 255).
Aa
Black text reads best on this color (11.40:1).
About this color
#17CFFF is a light, vivid teal or cyan. In OKLCH its lightness is 79%, its chroma 0.145 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Sky Blue (#02CCFE), ΔE 0.009 away. Black text reads best on it, at 11.40:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Bright Sky Blue (#02CCFE) |
| Black text | 11.40:1 |
| White text | 1.84:1 |
Values
| HEX | #17CFFF |
| RGB | rgb(23, 207, 255) |
| HSL | hsl(192, 100%, 55%) |
| OKLCH | oklch(79.4% 0.145 222.9) |
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 #17CFFF | 1.84:1 | Fails | Lc -38.0 | Non-text elements, placeholder text |
| Black text on #17CFFF | 11.40:1 | AAA | Lc 69.9 | Content text, not long reading |
| #17CFFF text on white | 1.84:1 | Fails | Lc 34.0 | Non-text elements, placeholder text |
| #17CFFF text on black | 11.40:1 | AAA | Lc -68.6 | 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
#E8F9FF
oklch(97.1% 0.02 220.9)
-
Step 100
100
#CDF1FF
oklch(93.7% 0.042 223.3)
-
Step 200
200
#9FE5FF
oklch(88.4% 0.078 223.2)
-
Step 300
300 (this color)
#17CFFF
oklch(79.4% 0.145 222.9)
-
Step 400
400
#00B1DC
oklch(70.6% 0.132 223.3)
-
Step 500
500
#0098BD
oklch(63.1% 0.118 223.1)
-
Step 600
600
#00809F
oklch(55.6% 0.103 222.6)
-
Step 700
700
#006B86
oklch(49% 0.091 223.1)
-
Step 800
800
#00586E
oklch(42.7% 0.079 222.3)
-
Step 900
900
#00495D
oklch(37.7% 0.071 223.8)
-
Step 950
950
#002B38
oklch(26.8% 0.05 223.6)
#17CFFF 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) | #B3CAFF | 0.113 |
| Deuteranopia (no green cones) | #98B6FF | 0.101 |
| Tritanopia (no blue cones) | #00DEDF | 0.071 |
| Achromatopsia (no color) | #BFBFBF | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17CFFF
#17CFFF
oklch(79.4% 0.145 222.9)
- #FFA079
#FFA079
oklch(79.4% 0.125 42.9)
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 #17CFFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Sky Blue #02CCFE ΔE 0.009
- Vivid Sky Blue #4CC9F0 ΔE 0.026
- Deep Sky Blue #00BFFF ΔE 0.045
- Aqua Blue #02D8E9 ΔE 0.046
- Lightblue #7BC8F6 ΔE 0.053
- Sky #82CAFC ΔE 0.059
- Light Sky Blue #87CEFA ΔE 0.064
- Sky Blue #87CEEB ΔE 0.067
Use #17CFFF 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.