#018A5B
Closest named color: Sea Green (#2E8B57). oklch(55.9% 0.125 160.6), rgb(1, 138, 91).
Aa
Black text reads best on this color (4.78:1).
About this color
#018A5B is a medium-dark, moderately saturated green. In OKLCH its lightness is 56%, its chroma 0.125 and its hue 161°. 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 (0.125) |
| Temperature | in between |
| Nearest name | Sea Green (#2E8B57) |
| Black text | 4.78:1 |
| White text | 4.38:1 |
Values
| HEX | #018A5B |
| RGB | rgb(1, 138, 91) |
| HSL | hsl(159, 99%, 27%) |
| OKLCH | oklch(55.9% 0.125 160.6) |
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 #018A5B | 4.38:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #018A5B | 4.78:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #018A5B text on white | 4.38:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #018A5B text on black | 4.78:1 | AA | Lc -31.9 | 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
#A1CCB5
oklch(80.8% 0.056 161.5)
-
Step 400
400
#6BB28E
oklch(70.6% 0.09 160.8)
-
Step 500
500
#3C9F72
oklch(63.2% 0.115 160.5)
-
Step 600
600 (this color)
#018A5B
oklch(55.9% 0.125 160.6)
-
Step 700
700
#00734B
oklch(49% 0.11 160.6)
-
Step 800
800
#005E3D
oklch(42.6% 0.095 160.9)
-
Step 900
900
#114E34
oklch(37.8% 0.076 160.4)
-
Step 950
950
#0D2D1F
oklch(26.9% 0.046 161.9)
#018A5B 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) | #887E58 | 0.119 |
| Deuteranopia (no green cones) | #7A745E | 0.116 |
| Tritanopia (no blue cones) | #00897E | 0.054 |
| Achromatopsia (no color) | #787878 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #018A5B
#018A5B
oklch(55.9% 0.125 160.6)
- #A4548A
#A4548A
oklch(56% 0.125 341)
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 #018A5B, 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 0.027
- Jungle Green #048243 ΔE 0.035
- Light Forest Green #4F9153 ΔE 0.050
- Dark Sage #598556 ΔE 0.052
- Fern Green #548D44 ΔE 0.053
- Kelley Green #009337 ΔE 0.058
- Ocean Green #3D9973 ΔE 0.061
Use #018A5B 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.