#42BB59
Closest named color: Cool Green (#33B864). oklch(70.2% 0.175 146.9), rgb(66, 187, 89).
Aa
Black text reads best on this color (8.48:1).
About this color
#42BB59 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.175 and its hue 147°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Cool Green (#33B864), ΔE 0.018 away. Black text reads best on it, at 8.48:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.175) |
| Temperature | in between |
| Nearest name | Cool Green (#33B864) |
| Black text | 8.48:1 |
| White text | 2.47:1 |
Values
| HEX | #42BB59 |
| RGB | rgb(66, 187, 89) |
| HSL | hsl(131, 48%, 50%) |
| OKLCH | oklch(70.2% 0.175 146.9) |
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 #42BB59 | 2.47:1 | Fails | Lc -53.3 | Large or bold text, headings |
| Black text on #42BB59 | 8.48:1 | AAA | Lc 55.7 | Large or bold text, headings |
| #42BB59 text on white | 2.47:1 | Fails | Lc 48.2 | Large or bold text, headings |
| #42BB59 text on black | 8.48:1 | AAA | Lc -53.7 | 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
#EFF8F0
oklch(97% 0.014 148.8)
-
Step 100
100
#DDF0DE
oklch(93.6% 0.031 146.8)
-
Step 200
200
#C0E5C2
oklch(88.6% 0.061 146.5)
-
Step 300
300
#91D497
oklch(80.9% 0.109 146.7)
-
Step 400
400 (this color)
#42BB59
oklch(70.2% 0.175 146.9)
-
Step 500
500
#00A63B
oklch(63.2% 0.188 146.9)
-
Step 600
600
#008B30
oklch(55.5% 0.165 146.9)
-
Step 700
700
#007527
oklch(49% 0.146 146.9)
-
Step 800
800
#00601F
oklch(42.6% 0.127 147)
-
Step 900
900
#005018
oklch(37.6% 0.112 146.9)
-
Step 950
950
#00300B
oklch(26.9% 0.08 146.8)
#42BB59 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) | #BDAB50 | 0.136 |
| Deuteranopia (no green cones) | #AEA160 | 0.134 |
| Tritanopia (no blue cones) | #1DB7A5 | 0.103 |
| Achromatopsia (no color) | #A5A5A5 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42BB59
#42BB59
oklch(70.2% 0.175 146.9)
- #D673D7
#D673D7
oklch(70.2% 0.175 326.9)
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 #42BB59, closest first.
No curated palette has a color within ΔE 0.04 of #42BB59.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Green #33B864 ΔE 0.018
- Leafy Green #51B73B ΔE 0.026
- Algae Green #21C36F ΔE 0.027
- Dark Mint Green #20C073 ΔE 0.028
- Dark Mint #48C072 ΔE 0.030
- Shamrock Green #02C14D ΔE 0.031
- Shamrock #01B44C ΔE 0.035
- Dark Pastel Green #56AE57 ΔE 0.038
Use #42BB59 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.