#175B55
Closest named color: Deep Teal (#00555A). oklch(42.8% 0.066 186.4), rgb(23, 91, 85).
Aa
White text reads best on this color (7.88:1).
About this color
#175B55 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.066 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.027 away. White text reads best on it, at 7.88:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.66:1 |
| White text | 7.88:1 |
Values
| HEX | #175B55 |
| RGB | rgb(23, 91, 85) |
| HSL | hsl(175, 60%, 22%) |
| OKLCH | oklch(42.8% 0.066 186.4) |
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 #175B55 | 7.88:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #175B55 | 2.66:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #175B55 text on white | 7.88:1 | AAA | Lc 87.1 | Fine for body text |
| #175B55 text on black | 2.66:1 | Fails | Lc -15.0 | 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
#73AEA7
oklch(70.8% 0.062 186.5)
-
Step 500
500
#4A9991
oklch(63.1% 0.079 186.7)
-
Step 600
600
#25837B
oklch(55.5% 0.086 186.7)
-
Step 700
700
#156F68
oklch(49.1% 0.08 186.9)
-
Step 800
800 (this color)
#175B55
oklch(42.8% 0.066 186.4)
-
Step 900
900
#1B4A46
oklch(37.6% 0.051 187.6)
-
Step 950
950
#112C29
oklch(27.1% 0.034 185.9)
#175B55 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) | #565655 | 0.070 |
| Deuteranopia (no green cones) | #4C4E56 | 0.067 |
| Tritanopia (no blue cones) | #005D59 | 0.010 |
| Achromatopsia (no color) | #515151 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175B55
#175B55
oklch(42.8% 0.066 186.4)
- #6E3F49
#6E3F49
oklch(42.7% 0.067 6.5)
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 #175B55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.027
- Dark Green Blue #1F6357 ΔE 0.027
- Petrol #005F6A ΔE 0.033
- Dark Blue Green #005249 ΔE 0.035
- Dark Slate Gray #2F4F4F ΔE 0.039
- Dark Aqua #05696B ΔE 0.048
- Dark Teal #014D4E ΔE 0.049
- Spruce #0A5F38 ΔE 0.053
Use #175B55 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.