#177B73
Closest named color: Bluegreen (#017A79). oklch(52.8% 0.087 186.6), rgb(23, 123, 115).
Aa
White text reads best on this color (5.10:1).
About this color
#177B73 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.087 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.012 away. White text reads best on it, at 5.10:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.11:1 |
| White text | 5.10:1 |
Values
| HEX | #177B73 |
| RGB | rgb(23, 123, 115) |
| HSL | hsl(175, 68%, 29%) |
| OKLCH | oklch(52.8% 0.087 186.6) |
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 #177B73 | 5.10:1 | AA | Lc -80.2 | Fine for body text |
| Black text on #177B73 | 4.11:1 | AA large text | Lc 29.3 | Dividers and decoration only |
| #177B73 text on white | 5.10:1 | AA | Lc 74.8 | Content text, not long reading |
| #177B73 text on black | 4.11:1 | AA large text | Lc -26.9 | 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 600.
-
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
#A5C9C4
oklch(80.8% 0.039 186.1)
-
Step 400
400
#73AEA7
oklch(70.8% 0.062 186.5)
-
Step 500
500
#499991
oklch(63% 0.08 186.7)
-
Step 600
600 (this color)
#177B73
oklch(52.8% 0.087 186.6)
-
Step 700
700
#146F68
oklch(49% 0.08 186.9)
-
Step 800
800
#165B55
oklch(42.8% 0.067 186.5)
-
Step 900
900
#1B4A46
oklch(37.6% 0.051 187.6)
-
Step 950
950
#112C29
oklch(27.1% 0.034 185.9)
#177B73 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) | #747473 | 0.092 |
| Deuteranopia (no green cones) | #676A74 | 0.087 |
| Tritanopia (no blue cones) | #007E78 | 0.010 |
| Achromatopsia (no color) | #6E6E6E | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #177B73
#177B73
oklch(52.8% 0.087 186.6)
- #955563
#955563
oklch(52.8% 0.086 6.4)
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 #177B73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.012
- Teal #008080 ΔE 0.021
- Deep Aqua #08787F ΔE 0.024
- Dark Aquamarine #017371 ΔE 0.027
- Deep Turquoise #017374 ΔE 0.028
- Ocean #017B92 ΔE 0.050
- Dark Cyan #008B8B ΔE 0.052
- Dark Aqua #05696B ΔE 0.057
Use #177B73 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.