#175A73
Closest named color: Petrol (#005F6A). oklch(43.9% 0.076 227.9), rgb(23, 90, 115).
Aa
White text reads best on this color (7.64:1).
About this color
#175A73 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 44%, its chroma 0.076 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.026 away. White text reads best on it, at 7.64:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.74:1 |
| White text | 7.64:1 |
Values
| HEX | #175A73 |
| RGB | rgb(23, 90, 115) |
| HSL | hsl(196, 67%, 27%) |
| OKLCH | oklch(43.9% 0.076 227.9) |
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 #175A73 | 7.64:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #175A73 | 2.74:1 | Fails | Lc 17.8 | Dividers and decoration only |
| #175A73 text on white | 7.64:1 | AAA | Lc 86.2 | Fine for body text |
| #175A73 text on black | 2.74:1 | Fails | Lc -15.8 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A4C7D7
oklch(80.9% 0.044 227.3)
-
Step 400
400
#70AAC4
oklch(70.8% 0.071 228)
-
Step 500
500
#4694B5
oklch(63.1% 0.091 228.5)
-
Step 600
600
#1F7EA0
oklch(55.6% 0.098 227.5)
-
Step 700
700
#0E6A89
oklch(49% 0.091 227.8)
-
Step 800
800 (this color)
#175A73
oklch(43.9% 0.076 227.9)
-
Step 900
900
#19485A
oklch(37.8% 0.059 226.9)
-
Step 950
950
#102A35
oklch(27% 0.038 228.2)
#175A73 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) | #4D5874 | 0.055 |
| Deuteranopia (no green cones) | #405073 | 0.046 |
| Tritanopia (no blue cones) | #006162 | 0.042 |
| Achromatopsia (no color) | #535353 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175A73
#175A73
oklch(43.9% 0.076 227.9)
- #74442B
#74442B
oklch(43.8% 0.076 47.5)
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 #175A73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.036
- YInMn Blue #415A77 ΔE 0.040
- Light Navy Blue #2E5A88 ΔE 0.041
- Deep Teal #00555A ΔE 0.045
- Light Navy #155084 ΔE 0.047
- Dark Aqua #05696B ΔE 0.054
- Dusk Blue #26538D ΔE 0.054
Use #175A73 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.