#42B080
Closest named color: Dark Seafoam Green (#3EAF76). oklch(68.1% 0.124 161.4), rgb(66, 176, 128).
Aa
Black text reads best on this color (7.75:1).
About this color
#42B080 is a medium-light, moderately saturated green. In OKLCH its lightness is 68%, its chroma 0.124 and its hue 161°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam Green (#3EAF76), ΔE 0.014 away. Black text reads best on it, at 7.75:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.124) |
| Temperature | in between |
| Nearest name | Dark Seafoam Green (#3EAF76) |
| Black text | 7.75:1 |
| White text | 2.70:1 |
Values
| HEX | #42B080 |
| RGB | rgb(66, 176, 128) |
| HSL | hsl(154, 45%, 47%) |
| OKLCH | oklch(68.1% 0.124 161.4) |
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 #42B080 | 2.70:1 | Fails | Lc -57.4 | Large or bold text, headings |
| Black text on #42B080 | 7.75:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #42B080 text on white | 2.70:1 | Fails | Lc 52.2 | Large or bold text, headings |
| #42B080 text on black | 7.75:1 | AAA | Lc -49.7 | 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
#F0F8F3
oklch(97.2% 0.011 158.8)
-
Step 100
100
#DEEFE5
oklch(93.7% 0.022 160.2)
-
Step 200
200
#C1E2D0
oklch(88.4% 0.043 161.6)
-
Step 300
300
#93D1B1
oklch(81% 0.078 161.5)
-
Step 400
400 (this color)
#42B080
oklch(68.1% 0.124 161.4)
-
Step 500
500
#00A36E
oklch(63.2% 0.14 161.4)
-
Step 600
600
#00895C
oklch(55.7% 0.123 161.5)
-
Step 700
700
#00734C
oklch(49.1% 0.109 161.2)
-
Step 800
800
#005E3E
oklch(42.6% 0.094 161.6)
-
Step 900
900
#004F33
oklch(37.8% 0.084 161.3)
-
Step 950
950
#002F1D
oklch(27% 0.059 161.7)
#42B080 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) | #AEA47D | 0.119 |
| Deuteranopia (no green cones) | #9F9983 | 0.115 |
| Tritanopia (no blue cones) | #00B0A3 | 0.051 |
| Achromatopsia (no color) | #9D9D9D | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42B080
#42B080
oklch(68.1% 0.124 161.4)
- #CC79AF
#CC79AF
oklch(68.2% 0.123 341.4)
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 #42B080, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam Green #3EAF76 ΔE 0.014
- Bluey Green #2BB179 ΔE 0.017
- Dark Seafoam #1FB57A ΔE 0.024
- Medium Sea Green #3CB371 ΔE 0.025
- Tea #65AB7C ΔE 0.028
- Greeny Blue #42B395 ΔE 0.029
- Algae #54AC68 ΔE 0.030
- Green Teal #0CB577 ΔE 0.030
Use #42B080 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.