#42CBA1
Closest named color: Medium Aquamarine (#66CDAA). oklch(75.8% 0.133 168.5), rgb(66, 203, 161).
Aa
Black text reads best on this color (10.28:1).
About this color
#42CBA1 is a medium-light, moderately saturated green. In OKLCH its lightness is 76%, its chroma 0.133 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.030 away. Black text reads best on it, at 10.28:1.
| Hue family | Greens |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.133) |
| Temperature | in between |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.28:1 |
| White text | 2.04:1 |
Values
| HEX | #42CBA1 |
| RGB | rgb(66, 203, 161) |
| HSL | hsl(162, 57%, 53%) |
| OKLCH | oklch(75.8% 0.133 168.5) |
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 #42CBA1 | 2.04:1 | Fails | Lc -43.9 | Non-text elements, placeholder text |
| Black text on #42CBA1 | 10.28:1 | AAA | Lc 64.6 | Content text, not long reading |
| #42CBA1 text on white | 2.04:1 | Fails | Lc 39.4 | Non-text elements, placeholder text |
| #42CBA1 text on black | 10.28:1 | AAA | Lc -63.0 | Content text, not long reading |
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
#EFF8F4
oklch(97.1% 0.011 167.8)
-
Step 100
100
#DBEFE7
oklch(93.5% 0.024 169.9)
-
Step 200
200
#BDE3D4
oklch(88.4% 0.045 169.4)
-
Step 300
300
#8AD2B7
oklch(80.9% 0.082 168.7)
-
Step 400
400 (this color)
#42CBA1
oklch(75.8% 0.133 168.5)
-
Step 500
500
#00A17B
oklch(63% 0.127 168.5)
-
Step 600
600
#008867
oklch(55.7% 0.112 168.2)
-
Step 700
700
#007256
oklch(49% 0.099 168.4)
-
Step 800
800
#005E46
oklch(42.8% 0.087 168)
-
Step 900
900
#004E3A
oklch(37.7% 0.076 168.5)
-
Step 950
950
#002F21
oklch(27.1% 0.055 167.3)
#42CBA1 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) | #C6BD9F | 0.135 |
| Deuteranopia (no green cones) | #B3B0A4 | 0.129 |
| Tritanopia (no blue cones) | #00CCBF | 0.042 |
| Achromatopsia (no color) | #B5B5B5 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42CBA1
#42CBA1
oklch(75.8% 0.133 168.5)
- #EE8CBE
#EE8CBE
oklch(75.8% 0.132 348.8)
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 #42CBA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.030
- Emerald #06D6A0 ΔE 0.034
- Greenblue #23C48B ΔE 0.037
- Green Blue #01C08D ΔE 0.045
- Seafoam Blue #78D1B6 ΔE 0.055
- Soft Green #6FC276 ΔE 0.055
- Pale Teal #82CBB2 ΔE 0.059
- Medium Turquoise #48D1CC ΔE 0.060
Use #42CBA1 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.