#3BB778
Closest named color: Medium Sea Green (#3CB371). oklch(69.6% 0.143 156.9), rgb(59, 183, 120).
Aa
Black text reads best on this color (8.23:1).
About this color
#3BB778 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.143 and its hue 157°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Medium Sea Green (#3CB371), ΔE 0.012 away. Black text reads best on it, at 8.23:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.143) |
| Temperature | in between |
| Nearest name | Medium Sea Green (#3CB371) |
| Black text | 8.23:1 |
| White text | 2.55:1 |
Values
| HEX | #3BB778 |
| RGB | rgb(59, 183, 120) |
| HSL | hsl(150, 51%, 47%) |
| OKLCH | oklch(69.6% 0.143 156.9) |
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 #3BB778 | 2.55:1 | Fails | Lc -54.7 | Large or bold text, headings |
| Black text on #3BB778 | 8.23:1 | AAA | Lc 54.4 | Large or bold text, headings |
| #3BB778 text on white | 2.55:1 | Fails | Lc 49.6 | Large or bold text, headings |
| #3BB778 text on black | 8.23:1 | AAA | Lc -52.4 | 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
#EFF8F2
oklch(97.1% 0.012 157)
-
Step 100
100
#DDEFE3
oklch(93.5% 0.025 156.7)
-
Step 200
200
#BFE4CC
oklch(88.6% 0.051 156.8)
-
Step 300
300
#8FD2A9
oklch(80.8% 0.09 156.9)
-
Step 400
400 (this color)
#3BB778
oklch(69.6% 0.143 156.9)
-
Step 500
500
#00A463
oklch(63.2% 0.151 156.8)
-
Step 600
600
#008A52
oklch(55.7% 0.134 156.6)
-
Step 700
700
#007444
oklch(49.2% 0.118 156.6)
-
Step 800
800
#005F37
oklch(42.7% 0.102 156.7)
-
Step 900
900
#004F2D
oklch(37.6% 0.09 156.8)
-
Step 950
950
#002F19
oklch(26.9% 0.064 157.1)
#3BB778 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) | #B6A974 | 0.131 |
| Deuteranopia (no green cones) | #A69E7C | 0.127 |
| Tritanopia (no blue cones) | #00B6A7 | 0.067 |
| Achromatopsia (no color) | #A2A2A2 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3BB778
#3BB778
oklch(69.6% 0.143 156.9)
- #D478BD
#D478BD
oklch(69.6% 0.143 337.1)
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 #3BB778, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Sea Green #3CB371 ΔE 0.012
- Dark Seafoam #1FB57A ΔE 0.014
- Green Teal #0CB577 ΔE 0.018
- Bluey Green #2BB179 ΔE 0.021
- Dark Seafoam Green #3EAF76 ΔE 0.023
- Cool Green #33B864 ΔE 0.028
- Jade Green #2BAF6A ΔE 0.029
- Dark Mint Green #20C073 ΔE 0.030
Use #3BB778 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.