#178F65
Closest named color: Viridian (#1E9167). oklch(57.8% 0.119 163), rgb(23, 143, 101).
Aa
Black text reads best on this color (5.15:1).
About this color
#178F65 is a medium-dark, moderately saturated green. In OKLCH its lightness is 58%, its chroma 0.119 and its hue 163°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Viridian (#1E9167), ΔE 0.007 away. Black text reads best on it, at 5.15:1.
| Hue family | Greens |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.119) |
| Temperature | in between |
| Nearest name | Viridian (#1E9167) |
| Black text | 5.15:1 |
| White text | 4.07:1 |
Values
| HEX | #178F65 |
| RGB | rgb(23, 143, 101) |
| HSL | hsl(159, 72%, 33%) |
| OKLCH | oklch(57.8% 0.119 163) |
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 #178F65 | 4.07:1 | AA large text | Lc -73.0 | Content text, not long reading |
| Black text on #178F65 | 5.15:1 | AA | Lc 36.6 | Non-text elements, placeholder text |
| #178F65 text on white | 4.07:1 | AA large text | Lc 67.5 | Content text, not long reading |
| #178F65 text on black | 5.15:1 | AA | Lc -34.2 | Non-text elements, placeholder text |
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
#F1F7F4
oklch(97.1% 0.007 164.9)
-
Step 100
100
#E1EDE7
oklch(93.5% 0.015 164.7)
-
Step 200
200
#C8E0D3
oklch(88.5% 0.031 162.1)
-
Step 300
300
#A2CCB7
oklch(80.9% 0.053 163.3)
-
Step 400
400
#6CB291
oklch(70.8% 0.087 162.7)
-
Step 500
500
#3D9E76
oklch(63.1% 0.11 162.9)
-
Step 600
600 (this color)
#178F65
oklch(57.8% 0.119 163)
-
Step 700
700
#00734F
oklch(49.1% 0.106 163)
-
Step 800
800
#025E40
oklch(42.7% 0.092 162.9)
-
Step 900
900
#134D36
oklch(37.6% 0.071 162.6)
-
Step 950
950
#0E2D20
oklch(26.9% 0.044 163.2)
#178F65 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) | #8C8463 | 0.115 |
| Deuteranopia (no green cones) | #7E7A68 | 0.111 |
| Tritanopia (no blue cones) | #008F84 | 0.046 |
| Achromatopsia (no color) | #7E7E7E | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178F65
#178F65
oklch(57.8% 0.119 163)
- #A95B8C
#A95B8C
oklch(57.8% 0.119 343.1)
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 #178F65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Viridian #1E9167 ΔE 0.007
- Sea Green #2E8B57 ΔE 0.019
- Light Forest Green #4F9153 ΔE 0.041
- Ocean Green #3D9973 ΔE 0.042
- Dark Sage #598556 ΔE 0.049
- Fern Green #548D44 ΔE 0.050
- Jungle Green #048243 ΔE 0.054
- Blue Green #0F9B8E ΔE 0.061
Use #178F65 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.