#018A59
Closest named color: Sea Green (#2E8B57). oklch(55.9% 0.127 159.6), rgb(1, 138, 89).
Aa
Black text reads best on this color (4.78:1).
About this color
#018A59 is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.127 and its hue 160°. 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 4.78:1.
| Hue family | Greens |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.127) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.78:1 |
| White text | 4.39:1 |
Values
| HEX | #018A59 |
| RGB | rgb(1, 138, 89) |
| HSL | hsl(159, 99%, 27%) |
| OKLCH | oklch(55.9% 0.127 159.6) |
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 #018A59 | 4.39:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #018A59 | 4.78:1 | AA | Lc 34.2 | Non-text elements, placeholder text |
| #018A59 text on white | 4.39:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #018A59 text on black | 4.78:1 | AA | Lc -31.8 | 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
#E1EDE6
oklch(93.5% 0.016 160.6)
-
Step 200
200
#C8E0D2
oklch(88.5% 0.032 160.1)
-
Step 300
300
#A2CCB4
oklch(80.8% 0.056 159.8)
-
Step 400
400
#6BB28D
oklch(70.6% 0.091 160.1)
-
Step 500
500
#3C9F70
oklch(63.2% 0.117 159.4)
-
Step 600
600 (this color)
#018A59
oklch(55.9% 0.127 159.6)
-
Step 700
700
#00734A
oklch(49% 0.111 160)
-
Step 800
800
#005F3C
oklch(42.8% 0.097 159.8)
-
Step 900
900
#114E33
oklch(37.8% 0.077 159.5)
-
Step 950
950
#0D2E1E
oklch(27.1% 0.049 159.3)
#018A59 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) | #887E56 | 0.119 |
| Deuteranopia (no green cones) | #7A745C | 0.116 |
| Tritanopia (no blue cones) | #00897D | 0.055 |
| Achromatopsia (no color) | #787878 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #018A59
#018A59
oklch(55.9% 0.127 159.6)
- #A3538C
#A3538C
oklch(55.8% 0.127 339.2)
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 #018A59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sea Green #2E8B57 ΔE 0.016
- Viridian #1E9167 ΔE 0.028
- Jungle Green #048243 ΔE 0.033
- Light Forest Green #4F9153 ΔE 0.050
- Fern Green #548D44 ΔE 0.052
- Dark Sage #598556 ΔE 0.053
- Kelley Green #009337 ΔE 0.056
- Forest Green #228B22 ΔE 0.060
Use #018A59 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.