#42C488
Closest named color: Greenblue (#23C48B). oklch(73.4% 0.144 159.3), rgb(66, 196, 136).
Aa
Black text reads best on this color (9.48:1).
About this color
#42C488 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.144 and its hue 159°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greenblue (#23C48B), ΔE 0.013 away. Black text reads best on it, at 9.48:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Greenblue (#23C48B) |
| Black text | 9.48:1 |
| White text | 2.21:1 |
Values
| HEX | #42C488 |
| RGB | rgb(66, 196, 136) |
| HSL | hsl(152, 52%, 51%) |
| OKLCH | oklch(73.4% 0.144 159.3) |
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 #42C488 | 2.21:1 | Fails | Lc -48.0 | Large or bold text, headings |
| Black text on #42C488 | 9.48:1 | AAA | Lc 60.7 | Content text, not long reading |
| #42C488 text on white | 2.21:1 | Fails | Lc 43.2 | Non-text elements, placeholder text |
| #42C488 text on black | 9.48:1 | AAA | Lc -58.9 | 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
#EFF8F3
oklch(97.1% 0.012 162.1)
-
Step 100
100
#DCF0E4
oklch(93.7% 0.026 159.6)
-
Step 200
200
#BEE4CE
oklch(88.6% 0.05 159.8)
-
Step 300
300
#8DD3AC
oklch(81% 0.09 159.2)
-
Step 400
400 (this color)
#42C488
oklch(73.4% 0.144 159.3)
-
Step 500
500
#00A369
oklch(63.1% 0.144 159.3)
-
Step 600
600
#008958
oklch(55.6% 0.127 159.5)
-
Step 700
700
#007349
oklch(49% 0.112 159.4)
-
Step 800
800
#005F3B
oklch(42.8% 0.098 159.1)
-
Step 900
900
#004F31
oklch(37.7% 0.086 159.7)
-
Step 950
950
#002F1B
oklch(26.9% 0.062 159.3)
#42C488 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) | #C2B584 | 0.135 |
| Deuteranopia (no green cones) | #B1A98C | 0.132 |
| Tritanopia (no blue cones) | #00C3B4 | 0.063 |
| Achromatopsia (no color) | #AEAEAE | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42C488
#42C488
oklch(73.4% 0.144 159.3)
- #E383C6
#E383C6
oklch(73.4% 0.143 339.4)
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 #42C488, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greenblue #23C48B ΔE 0.013
- Green Blue #01C08D ΔE 0.025
- Dark Mint #48C072 ΔE 0.026
- Dark Mint Green #20C073 ΔE 0.034
- Soft Green #6FC276 ΔE 0.035
- Algae Green #21C36F ΔE 0.037
- Seaweed #18D17B ΔE 0.047
- Dark Seafoam #1FB57A ΔE 0.049
Use #42C488 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.