#17758F
Closest named color: Sea Blue (#047495). oklch(52.3% 0.09 222), rgb(23, 117, 143).
Aa
White text reads best on this color (5.27:1).
About this color
#17758F is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.090 and its hue 222°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.012 away. White text reads best on it, at 5.27:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.97:1 |
| White text | 5.27:1 |
Values
| HEX | #17758F |
| RGB | rgb(23, 117, 143) |
| HSL | hsl(193, 72%, 33%) |
| OKLCH | oklch(52.3% 0.09 222) |
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 #17758F | 5.27:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #17758F | 3.97:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #17758F text on white | 5.27:1 | AA | Lc 75.8 | Fine for body text |
| #17758F text on black | 3.97:1 | AA large text | Lc -25.9 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C9DDE5
oklch(88.5% 0.024 223.7)
-
Step 300
300
#A3C8D5
oklch(81% 0.043 221.2)
-
Step 400
400
#6EABC0
oklch(70.7% 0.07 221.8)
-
Step 500
500
#4296B0
oklch(63.2% 0.089 221.3)
-
Step 600
600
#177F9C
oklch(55.5% 0.097 222.5)
-
Step 700
700 (this color)
#17758F
oklch(52.3% 0.09 222)
-
Step 800
800
#0C586C
oklch(42.8% 0.075 221.4)
-
Step 900
900
#164858
oklch(37.6% 0.059 223.1)
-
Step 950
950
#0F2A33
oklch(26.8% 0.037 222.6)
#17758F 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) | #667290 | 0.073 |
| Deuteranopia (no green cones) | #56678F | 0.064 |
| Tritanopia (no blue cones) | #007D7D | 0.044 |
| Achromatopsia (no color) | #6C6C6C | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17758F
#17758F
oklch(52.3% 0.09 222)
- #95573F
#95573F
oklch(52.3% 0.09 41.7)
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 #17758F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.012
- Ocean #017B92 ΔE 0.017
- Ocean Blue #03719C ΔE 0.027
- Deep Aqua #08787F ΔE 0.031
- Muted Blue #3B719F ΔE 0.040
- Metallic Blue #4F738E ΔE 0.043
- Bluegreen #017A79 ΔE 0.044
- Deep Turquoise #017374 ΔE 0.045
Use #17758F 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.