#175A57
Closest named color: Deep Teal (#00555A). oklch(42.6% 0.065 190.6), rgb(23, 90, 87).
Aa
White text reads best on this color (7.96:1).
About this color
#175A57 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.065 and its hue 191°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.022 away. White text reads best on it, at 7.96:1.
| 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 | 7.96:1 |
Values
| HEX | #175A57 |
| RGB | rgb(23, 90, 87) |
| HSL | hsl(177, 59%, 22%) |
| OKLCH | oklch(42.6% 0.065 190.6) |
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 #175A57 | 7.96:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #175A57 | 2.63:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #175A57 text on white | 7.96:1 | AAA | Lc 87.3 | Fine for body text |
| #175A57 text on black | 2.63:1 | Fails | Lc -14.8 | 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
#CADEDC
oklch(88.5% 0.022 189.5)
-
Step 300
300
#A6C9C6
oklch(81% 0.038 190)
-
Step 400
400
#73ADA9
oklch(70.7% 0.061 190.4)
-
Step 500
500
#4A9994
oklch(63.2% 0.078 189.9)
-
Step 600
600
#26837F
oklch(55.6% 0.084 190.8)
-
Step 700
700
#166F6B
oklch(49.2% 0.079 190.3)
-
Step 800
800 (this color)
#175A57
oklch(42.6% 0.065 190.6)
-
Step 900
900
#1C4A48
oklch(37.7% 0.05 191.3)
-
Step 950
950
#122B2A
oklch(26.9% 0.031 192.1)
#175A57 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) | #545557 | 0.068 |
| Deuteranopia (no green cones) | #4A4E58 | 0.064 |
| Tritanopia (no blue cones) | #005D59 | 0.011 |
| Achromatopsia (no color) | #515151 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175A57
#175A57
oklch(42.6% 0.065 190.6)
- #6D3F46
#6D3F46
oklch(42.5% 0.065 10.4)
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 #175A57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.022
- Petrol #005F6A ΔE 0.031
- Dark Green Blue #1F6357 ΔE 0.031
- Dark Blue Green #005249 ΔE 0.035
- Dark Slate Gray #2F4F4F ΔE 0.036
- Dark Teal #014D4E ΔE 0.046
- Dark Aqua #05696B ΔE 0.049
- Spruce #0A5F38 ΔE 0.058
Use #175A57 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.