#01B588
Closest named color: Dark Seafoam (#1FB57A). oklch(68.6% 0.14 167.2), rgb(1, 181, 136).
Aa
Black text reads best on this color (7.96:1).
About this color
#01B588 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.140 and its hue 167°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam (#1FB57A), ΔE 0.019 away. Black text reads best on it, at 7.96:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.140) |
| Temperature | in between |
| Nearest name | Dark Seafoam (#1FB57A) |
| Black text | 7.96:1 |
| White text | 2.63:1 |
Values
| HEX | #01B588 |
| RGB | rgb(1, 181, 136) |
| HSL | hsl(165, 99%, 36%) |
| OKLCH | oklch(68.6% 0.14 167.2) |
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 #01B588 | 2.63:1 | Fails | Lc -55.8 | Large or bold text, headings |
| Black text on #01B588 | 7.96:1 | AAA | Lc 53.3 | Large or bold text, headings |
| #01B588 text on white | 2.63:1 | Fails | Lc 50.7 | Large or bold text, headings |
| #01B588 text on black | 7.96:1 | AAA | Lc -51.2 | Large or bold text, headings |
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 400.
-
Step 50
50
#EEF8F4
oklch(97.1% 0.012 170.3)
-
Step 100
100
#DBF0E6
oklch(93.7% 0.026 165.6)
-
Step 200
200
#BBE4D2
oklch(88.5% 0.049 166.8)
-
Step 300
300
#87D3B5
oklch(80.9% 0.087 167.3)
-
Step 400
400 (this color)
#01B588
oklch(68.6% 0.14 167.2)
-
Step 500
500
#00A279
oklch(63.2% 0.13 167)
-
Step 600
600
#008865
oklch(55.6% 0.114 167)
-
Step 700
700
#007255
oklch(49% 0.1 167.6)
-
Step 800
800
#005E45
oklch(42.8% 0.088 167.1)
-
Step 900
900
#004E39
oklch(37.6% 0.077 167.4)
-
Step 950
950
#002F21
oklch(27.1% 0.055 167.3)
#01B588 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) | #B0A786 | 0.140 |
| Deuteranopia (no green cones) | #9E9A8B | 0.135 |
| Tritanopia (no blue cones) | #00B6A9 | 0.048 |
| Achromatopsia (no color) | #9F9F9F | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #01B588
#01B588
oklch(68.6% 0.14 167.2)
- #D773AB
#D773AB
oklch(68.5% 0.141 346.7)
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 #01B588, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam #1FB57A ΔE 0.019
- Bluey Green #2BB179 ΔE 0.020
- Green Teal #0CB577 ΔE 0.023
- Dark Seafoam Green #3EAF76 ΔE 0.026
- Medium Sea Green #3CB371 ΔE 0.030
- Green Blue #01C08D ΔE 0.031
- Greeny Blue #42B395 ΔE 0.032
- Seaweed Green #35AD6B ΔE 0.037
Use #01B588 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.