#178951
Closest named color: Sea Green (#2E8B57). oklch(55.7% 0.129 155.4), rgb(23, 137, 81).
Aa
Black text reads best on this color (4.73:1).
About this color
#178951 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.129 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sea Green (#2E8B57), ΔE 0.016 away. Black text reads best on it, at 4.73:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.129) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.73:1 |
| White text | 4.43:1 |
Values
| HEX | #178951 |
| RGB | rgb(23, 137, 81) |
| HSL | hsl(151, 71%, 31%) |
| OKLCH | oklch(55.7% 0.129 155.4) |
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 #178951 | 4.43:1 | AA large text | Lc -75.8 | Fine for body text |
| Black text on #178951 | 4.73:1 | AA | Lc 33.8 | Non-text elements, placeholder text |
| #178951 text on white | 4.43:1 | AA large text | Lc 70.3 | Content text, not long reading |
| #178951 text on black | 4.73:1 | AA | Lc -31.4 | 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
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E1EDE5
oklch(93.5% 0.017 156.9)
-
Step 200
200
#C9E0D0
oklch(88.5% 0.033 155.3)
-
Step 300
300
#A3CCB1
oklch(80.8% 0.058 156)
-
Step 400
400
#6FB287
oklch(70.7% 0.093 155.1)
-
Step 500
500
#439E69
oklch(63% 0.119 155.2)
-
Step 600
600 (this color)
#178951
oklch(55.7% 0.129 155.4)
-
Step 700
700
#007441
oklch(49.1% 0.121 155.2)
-
Step 800
800
#0C5E36
oklch(42.6% 0.099 155.4)
-
Step 900
900
#164D2F
oklch(37.6% 0.077 155.6)
-
Step 950
950
#0F2D1C
oklch(26.9% 0.048 156.1)
#178951 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) | #887D4D | 0.115 |
| Deuteranopia (no green cones) | #7B7455 | 0.112 |
| Tritanopia (no blue cones) | #00887B | 0.063 |
| Achromatopsia (no color) | #787878 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #178951
#178951
oklch(55.7% 0.129 155.4)
- #A15391
#A15391
oklch(55.7% 0.13 335.4)
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 #178951, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.016
- Jungle Green #048243 ΔE 0.026
- Viridian #1E9167 ΔE 0.034
- Fern Green #548D44 ΔE 0.047
- Light Forest Green #4F9153 ΔE 0.048
- Kelley Green #009337 ΔE 0.050
- Forest Green #228B22 ΔE 0.051
- Dark Sage #598556 ΔE 0.052
Use #178951 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.