#5BB666
Closest named color: Boring Green (#63B365). oklch(70% 0.144 146.4), rgb(91, 182, 102).
Aa
Black text reads best on this color (8.32:1).
About this color
#5BB666 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.144 and its hue 146°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.010 away. Black text reads best on it, at 8.32:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 8.32:1 |
| White text | 2.52:1 |
Values
| HEX | #5BB666 |
| RGB | rgb(91, 182, 102) |
| HSL | hsl(127, 38%, 54%) |
| OKLCH | oklch(70% 0.144 146.4) |
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 #5BB666 | 2.52:1 | Fails | Lc -54.3 | Large or bold text, headings |
| Black text on #5BB666 | 8.32:1 | AAA | Lc 54.8 | Large or bold text, headings |
| #5BB666 text on white | 2.52:1 | Fails | Lc 49.2 | Large or bold text, headings |
| #5BB666 text on black | 8.32:1 | AAA | Lc -52.7 | 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
#F1F8F1
oklch(97.2% 0.012 145.5)
-
Step 100
100
#DFEFE0
oklch(93.6% 0.026 147.1)
-
Step 200
200
#C5E3C6
oklch(88.6% 0.05 146)
-
Step 300
300
#9BD19E
oklch(81% 0.09 146.1)
-
Step 400
400 (this color)
#5BB666
oklch(70% 0.144 146.4)
-
Step 500
500
#16A53C
oklch(63.1% 0.184 146.4)
-
Step 600
600
#008C2D
oklch(55.7% 0.169 146.3)
-
Step 700
700
#007525
oklch(49% 0.148 146.5)
-
Step 800
800
#00601D
oklch(42.6% 0.128 146.5)
-
Step 900
900
#005016
oklch(37.5% 0.114 146.3)
-
Step 950
950
#04300D
oklch(27.1% 0.076 146.5)
#5BB666 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) | #B8A860 | 0.113 |
| Deuteranopia (no green cones) | #ACA06B | 0.112 |
| Tritanopia (no blue cones) | #4CB2A3 | 0.087 |
| Achromatopsia (no color) | #A3A3A3 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BB666
#5BB666
oklch(70% 0.144 146.4)
- #CC7CCE
#CC7CCE
oklch(70% 0.145 326.1)
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 #5BB666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.010
- Dark Pastel Green #56AE57 ΔE 0.026
- Cool Green #33B864 ΔE 0.027
- Medium Sea Green #3CB371 ΔE 0.027
- Dark Mint #48C072 ΔE 0.028
- Algae #54AC68 ΔE 0.032
- Turtle Green #75B84F ΔE 0.033
- Asparagus #77AB56 ΔE 0.036
Use #5BB666 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.