#18BB91
Closest named color: Green Blue (#01C08D). oklch(70.6% 0.138 168.8), rgb(24, 187, 145).
Aa
Black text reads best on this color (8.55:1).
About this color
#18BB91 is a medium-light, moderately saturated green. In OKLCH its lightness is 71%, its chroma 0.138 and its hue 169°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Green Blue (#01C08D), ΔE 0.017 away. Black text reads best on it, at 8.55:1.
| Hue family | Greens |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.138) |
| Temperature | in between |
| Nearest name | Green Blue (#01C08D) |
| Black text | 8.55:1 |
| White text | 2.45:1 |
Values
| HEX | #18BB91 |
| RGB | rgb(24, 187, 145) |
| HSL | hsl(165, 77%, 41%) |
| OKLCH | oklch(70.6% 0.138 168.8) |
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 #18BB91 | 2.45:1 | Fails | Lc -52.7 | Large or bold text, headings |
| Black text on #18BB91 | 8.55:1 | AAA | Lc 56.3 | Large or bold text, headings |
| #18BB91 text on white | 2.45:1 | Fails | Lc 47.7 | Large or bold text, headings |
| #18BB91 text on black | 8.55:1 | AAA | Lc -54.3 | 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
#DBF0E7
oklch(93.7% 0.025 168.2)
-
Step 200
200
#BBE4D4
oklch(88.5% 0.048 169.5)
-
Step 300
300
#87D3B7
oklch(80.9% 0.086 168.9)
-
Step 400
400 (this color)
#18BB91
oklch(70.6% 0.138 168.8)
-
Step 500
500
#00A17C
oklch(63% 0.126 169.1)
-
Step 600
600
#008868
oklch(55.7% 0.112 168.9)
-
Step 700
700
#007257
oklch(49.1% 0.098 169.1)
-
Step 800
800
#005E47
oklch(42.8% 0.086 168.9)
-
Step 900
900
#004E3A
oklch(37.7% 0.076 168.5)
-
Step 950
950
#002F22
oklch(27.1% 0.054 168.9)
#18BB91 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) | #B6AD8F | 0.140 |
| Deuteranopia (no green cones) | #A3A094 | 0.134 |
| Tritanopia (no blue cones) | #00BCAF | 0.042 |
| Achromatopsia (no color) | #A5A5A5 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18BB91
#18BB91
oklch(70.6% 0.138 168.8)
- #DE7AAE
#DE7AAE
oklch(70.5% 0.138 348.7)
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 #18BB91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Green Blue #01C08D ΔE 0.017
- Greeny Blue #42B395 ΔE 0.029
- Greenblue #23C48B ΔE 0.031
- Dark Seafoam #1FB57A ΔE 0.031
- Green Teal #0CB577 ΔE 0.036
- Bluey Green #2BB179 ΔE 0.036
- Dark Seafoam Green #3EAF76 ΔE 0.041
- Medium Sea Green #3CB371 ΔE 0.041
Use #18BB91 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.