#175E55
Closest named color: Dark Green Blue (#1F6357). oklch(43.7% 0.069 182.7), rgb(23, 94, 85).
Aa
White text reads best on this color (7.58:1).
About this color
#175E55 is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.069 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.018 away. White text reads best on it, at 7.58:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.76:1 |
| White text | 7.58:1 |
Values
| HEX | #175E55 |
| RGB | rgb(23, 94, 85) |
| HSL | hsl(172, 61%, 23%) |
| OKLCH | oklch(43.7% 0.069 182.7) |
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 #175E55 | 7.58:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #175E55 | 2.76:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #175E55 text on white | 7.58:1 | AAA | Lc 86.1 | Fine for body text |
| #175E55 text on black | 2.76:1 | Fails | Lc -16.0 | 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
#E2EDEA
oklch(93.7% 0.012 178)
-
Step 200
200
#CADEDA
oklch(88.5% 0.022 182.5)
-
Step 300
300
#A5CAC3
oklch(81% 0.041 182.5)
-
Step 400
400
#71AEA4
oklch(70.6% 0.065 183)
-
Step 500
500
#479A8E
oklch(63.1% 0.083 182.9)
-
Step 600
600
#208478
oklch(55.5% 0.09 183.1)
-
Step 700
700
#0F7065
oklch(49.1% 0.084 182.8)
-
Step 800
800 (this color)
#175E55
oklch(43.7% 0.069 182.7)
-
Step 900
900
#194B44
oklch(37.7% 0.055 182.6)
-
Step 950
950
#112C28
oklch(27% 0.034 182.9)
#175E55 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) | #595855 | 0.074 |
| Deuteranopia (no green cones) | #4F5156 | 0.069 |
| Tritanopia (no blue cones) | #00605B | 0.011 |
| Achromatopsia (no color) | #545454 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175E55
#175E55
oklch(43.7% 0.069 182.7)
- #71414E
#71414E
oklch(43.7% 0.069 2.8)
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 #175E55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.018
- Petrol #005F6A ΔE 0.034
- Deep Teal #00555A ΔE 0.036
- Dark Aqua #05696B ΔE 0.042
- Dark Blue Green #005249 ΔE 0.043
- Dark Slate Gray #2F4F4F ΔE 0.048
- Spruce #0A5F38 ΔE 0.049
- Pine #2B5D34 ΔE 0.049
Use #175E55 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.