#17738C
Closest named color: Sea Blue (#047495). oklch(51.7% 0.089 221.5), rgb(23, 115, 140).
Aa
White text reads best on this color (5.42:1).
About this color
#17738C is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.089 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Sea Blue (#047495), ΔE 0.014 away. White text reads best on it, at 5.42:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Sea Blue (#047495) |
| Black text | 3.86:1 |
| White text | 5.42:1 |
Values
| HEX | #17738C |
| RGB | rgb(23, 115, 140) |
| HSL | hsl(193, 72%, 32%) |
| OKLCH | oklch(51.7% 0.089 221.5) |
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 #17738C | 5.42:1 | AA | Lc -82.0 | Fine for body text |
| Black text on #17738C | 3.86:1 | AA large text | Lc 27.4 | Dividers and decoration only |
| #17738C text on white | 5.42:1 | AA | Lc 76.7 | Fine for body text |
| #17738C text on black | 3.86:1 | AA large text | Lc -25.1 | 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
#C9DDE4
oklch(88.5% 0.023 220.8)
-
Step 300
300
#A3C8D4
oklch(81% 0.043 219.5)
-
Step 400
400
#6FABBF
oklch(70.8% 0.069 221)
-
Step 500
500
#4495AF
oklch(63% 0.087 221.9)
-
Step 600
600
#1B7F9B
oklch(55.5% 0.095 222.1)
-
Step 700
700 (this color)
#17738C
oklch(51.7% 0.089 221.5)
-
Step 800
800
#0F586B
oklch(42.8% 0.073 220.6)
-
Step 900
900
#174857
oklch(37.6% 0.057 221.9)
-
Step 950
950
#102A33
oklch(26.9% 0.036 223.3)
#17738C 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) | #64708D | 0.071 |
| Deuteranopia (no green cones) | #55658C | 0.064 |
| Tritanopia (no blue cones) | #007B7B | 0.043 |
| Achromatopsia (no color) | #6A6A6A | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #17738C
#17738C
oklch(51.7% 0.089 221.5)
- #93563E
#93563E
oklch(51.8% 0.089 42)
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 #17738C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Blue #047495 ΔE 0.014
- Ocean #017B92 ΔE 0.023
- Ocean Blue #03719C ΔE 0.028
- Deep Aqua #08787F ΔE 0.030
- Deep Turquoise #017374 ΔE 0.041
- Muted Blue #3B719F ΔE 0.042
- Bluegreen #017A79 ΔE 0.043
- Peacock Blue #016795 ΔE 0.044
Use #17738C 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.