#175A5B
Closest named color: Deep Teal (#00555A). oklch(42.8% 0.064 196.5), rgb(23, 90, 91).
Aa
White text reads best on this color (7.92:1).
About this color
#175A5B is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.064 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.020 away. White text reads best on it, at 7.92:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.64:1 |
| White text | 7.92:1 |
Values
| HEX | #175A5B |
| RGB | rgb(23, 90, 91) |
| HSL | hsl(181, 60%, 22%) |
| OKLCH | oklch(42.8% 0.064 196.5) |
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 #175A5B | 7.92:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #175A5B | 2.64:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #175A5B text on white | 7.92:1 | AAA | Lc 87.2 | Fine for body text |
| #175A5B text on black | 2.64:1 | Fails | Lc -14.9 | Not readable |
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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CADEDE
oklch(88.6% 0.021 196.8)
-
Step 300
300
#A5C9C9
oklch(81% 0.038 196.4)
-
Step 400
400
#73ADAD
oklch(70.8% 0.06 195.9)
-
Step 500
500
#4A9899
oklch(63.1% 0.077 196.5)
-
Step 600
600
#258284
oklch(55.5% 0.084 197.1)
-
Step 700
700
#156E6F
oklch(49% 0.078 196.1)
-
Step 800
800 (this color)
#175A5B
oklch(42.8% 0.064 196.5)
-
Step 900
900
#1B4A4A
oklch(37.7% 0.051 195.2)
-
Step 950
950
#112B2C
oklch(26.9% 0.032 198.8)
#175A5B 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) | #53555B | 0.066 |
| Deuteranopia (no green cones) | #494E5B | 0.062 |
| Tritanopia (no blue cones) | #005D5A | 0.013 |
| Achromatopsia (no color) | #515151 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175A5B
#175A5B
oklch(42.8% 0.064 196.5)
- #6E4043
#6E4043
oklch(42.7% 0.064 15.9)
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 #175A5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.020
- Petrol #005F6A ΔE 0.025
- Dark Green Blue #1F6357 ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.037
- Dark Blue Green #005249 ΔE 0.039
- Dark Teal #014D4E ΔE 0.047
- Dark Aqua #05696B ΔE 0.047
- Charcoal #264653 ΔE 0.063
Use #175A5B 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.