#175B58
Closest named color: Deep Teal (#00555A). oklch(43% 0.066 190.7), rgb(23, 91, 88).
Aa
White text reads best on this color (7.85:1).
About this color
#175B58 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.066 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.025 away. White text reads best on it, at 7.85:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.67:1 |
| White text | 7.85:1 |
Values
| HEX | #175B58 |
| RGB | rgb(23, 91, 88) |
| HSL | hsl(177, 60%, 22%) |
| OKLCH | oklch(43% 0.066 190.7) |
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 #175B58 | 7.85:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #175B58 | 2.67:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #175B58 text on white | 7.85:1 | AAA | Lc 87.0 | Fine for body text |
| #175B58 text on black | 2.67:1 | Fails | Lc -15.1 | 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
#CADEDC
oklch(88.5% 0.022 189.5)
-
Step 300
300
#A5C9C6
oklch(80.9% 0.039 190.2)
-
Step 400
400
#73ADA9
oklch(70.7% 0.061 190.4)
-
Step 500
500
#499994
oklch(63.1% 0.079 189.9)
-
Step 600
600
#25837F
oklch(55.6% 0.085 190.8)
-
Step 700
700
#146F6B
oklch(49.1% 0.079 190.3)
-
Step 800
800 (this color)
#175B58
oklch(43% 0.066 190.7)
-
Step 900
900
#1B4A48
oklch(37.6% 0.051 191.4)
-
Step 950
950
#112C2A
oklch(27.1% 0.033 189)
#175B58 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) | #555658 | 0.069 |
| Deuteranopia (no green cones) | #4B4F59 | 0.064 |
| Tritanopia (no blue cones) | #005E5A | 0.011 |
| Achromatopsia (no color) | #525252 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175B58
#175B58
oklch(43% 0.066 190.7)
- #6F4047
#6F4047
oklch(43% 0.066 10.6)
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 #175B58, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.025
- Dark Green Blue #1F6357 ΔE 0.028
- Petrol #005F6A ΔE 0.029
- Dark Blue Green #005249 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.039
- Dark Aqua #05696B ΔE 0.046
- Dark Teal #014D4E ΔE 0.049
- Spruce #0A5F38 ΔE 0.058
Use #175B58 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.