#175B5B
Closest named color: Deep Teal (#00555A). oklch(43.1% 0.065 195), rgb(23, 91, 91).
Aa
White text reads best on this color (7.82:1).
About this color
#175B5B is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.065 and its hue 195°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.023 away. White text reads best on it, at 7.82:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.68:1 |
| White text | 7.82:1 |
Values
| HEX | #175B5B |
| RGB | rgb(23, 91, 91) |
| HSL | hsl(180, 60%, 22%) |
| OKLCH | oklch(43.1% 0.065 195) |
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 #175B5B | 7.82:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #175B5B | 2.68:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #175B5B text on white | 7.82:1 | AAA | Lc 86.9 | Fine for body text |
| #175B5B text on black | 2.68:1 | Fails | Lc -15.2 | 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
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CADEDD
oklch(88.5% 0.021 193.1)
-
Step 300
300
#A5C9C8
oklch(80.9% 0.038 194.3)
-
Step 400
400
#72ADAC
oklch(70.7% 0.061 194.5)
-
Step 500
500
#499898
oklch(63% 0.077 195.4)
-
Step 600
600
#248383
oklch(55.7% 0.085 195)
-
Step 700
700
#146E6E
oklch(49% 0.078 194.9)
-
Step 800
800 (this color)
#175B5B
oklch(43.1% 0.065 195)
-
Step 900
900
#1B4A4A
oklch(37.7% 0.051 195.2)
-
Step 950
950
#112B2B
oklch(26.9% 0.032 195.4)
#175B5B 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) | #55565B | 0.069 |
| Deuteranopia (no green cones) | #4A4F5B | 0.062 |
| Tritanopia (no blue cones) | #005E5B | 0.012 |
| Achromatopsia (no color) | #525252 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175B5B
#175B5B
oklch(43.1% 0.065 195)
- #6F4144
#6F4144
oklch(43.1% 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 #175B5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.023
- Petrol #005F6A ΔE 0.024
- Dark Green Blue #1F6357 ΔE 0.030
- Dark Slate Gray #2F4F4F ΔE 0.039
- Dark Blue Green #005249 ΔE 0.040
- Dark Aqua #05696B ΔE 0.045
- Dark Teal #014D4E ΔE 0.050
- Spruce #0A5F38 ΔE 0.063
Use #175B5B 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.