#175E6F
Closest named color: Petrol (#005F6A). oklch(44.8% 0.072 217.8), rgb(23, 94, 111).
Aa
White text reads best on this color (7.32:1).
About this color
#175E6F is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 45%, its chroma 0.072 and its hue 218°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.013 away. White text reads best on it, at 7.32:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.86:1 |
| White text | 7.32:1 |
Values
| HEX | #175E6F |
| RGB | rgb(23, 94, 111) |
| HSL | hsl(192, 66%, 26%) |
| OKLCH | oklch(44.8% 0.072 217.8) |
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 #175E6F | 7.32:1 | AAA | Lc -90.0 | Preferred for body text |
| Black text on #175E6F | 2.86:1 | Fails | Lc 18.9 | Dividers and decoration only |
| #175E6F text on white | 7.32:1 | AAA | Lc 85.1 | Fine for body text |
| #175E6F text on black | 2.86:1 | Fails | Lc -16.9 | 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 800.
-
Step 50
50
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C9DDE3
oklch(88.4% 0.023 217.7)
-
Step 300
300
#A3C8D3
oklch(81% 0.042 217.8)
-
Step 400
400
#6FABBD
oklch(70.7% 0.067 218.8)
-
Step 500
500
#4396AC
oklch(63.1% 0.086 217.9)
-
Step 600
600
#198097
oklch(55.5% 0.093 217.5)
-
Step 700
700
#056C81
oklch(49.1% 0.087 217.7)
-
Step 800
800 (this color)
#175E6F
oklch(44.8% 0.072 217.8)
-
Step 900
900
#174955
oklch(37.8% 0.056 216.7)
-
Step 950
950
#0F2B32
oklch(27.1% 0.036 216.6)
#175E6F 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) | #535B70 | 0.062 |
| Deuteranopia (no green cones) | #47526F | 0.056 |
| Tritanopia (no blue cones) | #006463 | 0.033 |
| Achromatopsia (no color) | #565656 | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175E6F
#175E6F
oklch(44.8% 0.072 217.8)
- #774637
#774637
oklch(44.8% 0.072 37.8)
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 #175E6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.013
- Dark Aqua #05696B ΔE 0.038
- YInMn Blue #415A77 ΔE 0.043
- Deep Teal #00555A ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.060
Use #175E6F 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.