#175A55
Closest named color: Deep Teal (#00555A). oklch(42.6% 0.065 187.7), rgb(23, 90, 85).
Aa
White text reads best on this color (7.98:1).
About this color
#175A55 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.065 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.024 away. White text reads best on it, at 7.98:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.63:1 |
| White text | 7.98:1 |
Values
| HEX | #175A55 |
| RGB | rgb(23, 90, 85) |
| HSL | hsl(176, 59%, 22%) |
| OKLCH | oklch(42.6% 0.065 187.7) |
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 #175A55 | 7.98:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #175A55 | 2.63:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #175A55 text on white | 7.98:1 | AAA | Lc 87.4 | Fine for body text |
| #175A55 text on black | 2.63:1 | Fails | Lc -14.7 | 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
#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
#A6C9C5
oklch(80.9% 0.038 187.9)
-
Step 400
400
#73ADA7
oklch(70.6% 0.061 187.7)
-
Step 500
500
#4B9992
oklch(63.2% 0.078 187.7)
-
Step 600
600
#27837C
oklch(55.6% 0.085 187.7)
-
Step 700
700
#176F69
oklch(49.1% 0.079 188)
-
Step 800
800 (this color)
#175A55
oklch(42.6% 0.065 187.7)
-
Step 900
900
#1C4A46
oklch(37.6% 0.051 187.5)
-
Step 950
950
#122C29
oklch(27.1% 0.033 185.7)
#175A55 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) | #555555 | 0.070 |
| Deuteranopia (no green cones) | #4B4E56 | 0.065 |
| Tritanopia (no blue cones) | #005C58 | 0.009 |
| Achromatopsia (no color) | #515151 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175A55
#175A55
oklch(42.6% 0.065 187.7)
- #6D3F48
#6D3F48
oklch(42.6% 0.065 7.6)
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 #175A55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.024
- Dark Green Blue #1F6357 ΔE 0.030
- Dark Blue Green #005249 ΔE 0.033
- Petrol #005F6A ΔE 0.033
- Dark Slate Gray #2F4F4F ΔE 0.036
- Dark Teal #014D4E ΔE 0.046
- Dark Aqua #05696B ΔE 0.051
- Spruce #0A5F38 ΔE 0.055
Use #175A55 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.