#175A71
Closest named color: Petrol (#005F6A). oklch(43.8% 0.074 225.8), rgb(23, 90, 113).
Aa
White text reads best on this color (7.67:1).
About this color
#175A71 is a dark, moderately saturated teal or cyan. In OKLCH its lightness is 44%, its chroma 0.074 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.024 away. White text reads best on it, at 7.67:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.73:1 |
| White text | 7.67:1 |
Values
| HEX | #175A71 |
| RGB | rgb(23, 90, 113) |
| HSL | hsl(195, 66%, 27%) |
| OKLCH | oklch(43.8% 0.074 225.8) |
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 #175A71 | 7.67:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #175A71 | 2.73:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #175A71 text on white | 7.67:1 | AAA | Lc 86.3 | Fine for body text |
| #175A71 text on black | 2.73:1 | Fails | Lc -15.7 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#C9DDE5
oklch(88.5% 0.024 223.7)
-
Step 300
300
#A4C7D6
oklch(80.9% 0.043 225.7)
-
Step 400
400
#70AAC2
oklch(70.7% 0.07 226)
-
Step 500
500
#4694B2
oklch(63% 0.089 226.1)
-
Step 600
600
#207E9E
oklch(55.5% 0.096 226.1)
-
Step 700
700
#0F6B87
oklch(49.2% 0.089 225.1)
-
Step 800
800 (this color)
#175A71
oklch(43.8% 0.074 225.8)
-
Step 900
900
#194859
oklch(37.8% 0.058 225.5)
-
Step 950
950
#102A34
oklch(27% 0.037 225.8)
#175A71 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) | #4D5872 | 0.055 |
| Deuteranopia (no green cones) | #414F71 | 0.049 |
| Tritanopia (no blue cones) | #006162 | 0.040 |
| Achromatopsia (no color) | #535353 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175A71
#175A71
oklch(43.8% 0.074 225.8)
- #73442D
#73442D
oklch(43.7% 0.074 46.3)
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 #175A71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.024
- Deep Sea Blue #015482 ΔE 0.039
- YInMn Blue #415A77 ΔE 0.041
- Deep Teal #00555A ΔE 0.042
- Light Navy Blue #2E5A88 ΔE 0.044
- Light Navy #155084 ΔE 0.050
- Dark Aqua #05696B ΔE 0.052
- Dark Slate Gray #2F4F4F ΔE 0.057
Use #175A71 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.