#175C55
Closest named color: Dark Green Blue (#1F6357). oklch(43.1% 0.067 185.1), rgb(23, 92, 85).
Aa
White text reads best on this color (7.78:1).
About this color
#175C55 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.067 and its hue 185°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.024 away. White text reads best on it, at 7.78:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.69:1 |
| White text | 7.78:1 |
Values
| HEX | #175C55 |
| RGB | rgb(23, 92, 85) |
| HSL | hsl(174, 60%, 23%) |
| OKLCH | oklch(43.1% 0.067 185.1) |
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 #175C55 | 7.78:1 | AAA | Lc -91.5 | Preferred for body text |
| Black text on #175C55 | 2.69:1 | Fails | Lc 17.3 | Dividers and decoration only |
| #175C55 text on white | 7.78:1 | AAA | Lc 86.7 | Fine for body text |
| #175C55 text on black | 2.69:1 | Fails | Lc -15.4 | 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CADEDB
oklch(88.5% 0.022 186)
-
Step 300
300
#A5C9C4
oklch(80.8% 0.039 186.1)
-
Step 400
400
#72AEA6
oklch(70.7% 0.063 185.3)
-
Step 500
500
#499990
oklch(63% 0.08 185.7)
-
Step 600
600
#24847A
oklch(55.7% 0.088 184.8)
-
Step 700
700
#136F67
oklch(49% 0.081 185.8)
-
Step 800
800 (this color)
#175C55
oklch(43.1% 0.067 185.1)
-
Step 900
900
#1B4B45
oklch(37.8% 0.053 184.1)
-
Step 950
950
#112C29
oklch(27.1% 0.034 185.9)
#175C55 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) | #575655 | 0.072 |
| Deuteranopia (no green cones) | #4D4F56 | 0.068 |
| Tritanopia (no blue cones) | #005E5A | 0.010 |
| Achromatopsia (no color) | #525252 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175C55
#175C55
oklch(43.1% 0.067 185.1)
- #6F404B
#6F404B
oklch(43.1% 0.067 5.1)
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 #175C55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.024
- Deep Teal #00555A ΔE 0.030
- Petrol #005F6A ΔE 0.033
- Dark Blue Green #005249 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.042
- Dark Aqua #05696B ΔE 0.046
- Spruce #0A5F38 ΔE 0.051
- Dark Teal #014D4E ΔE 0.052
Use #175C55 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.