#5BB521
Closest named color: Leafy Green (#51B73B). oklch(69% 0.195 136.6), rgb(91, 181, 33).
Aa
Black text reads best on this color (8.07:1).
About this color
#5BB521 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.195 and its hue 137°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Leafy Green (#51B73B), ΔE 0.015 away. Black text reads best on it, at 8.07:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.195) |
| Temperature | in between |
| Nearest name | Leafy Green (#51B73B) |
| Black text | 8.07:1 |
| White text | 2.60:1 |
Values
| HEX | #5BB521 |
| RGB | rgb(91, 181, 33) |
| HSL | hsl(96, 69%, 42%) |
| OKLCH | oklch(69% 0.195 136.6) |
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 #5BB521 | 2.60:1 | Fails | Lc -55.6 | Large or bold text, headings |
| Black text on #5BB521 | 8.07:1 | AAA | Lc 53.6 | Large or bold text, headings |
| #5BB521 text on white | 2.60:1 | Fails | Lc 50.4 | Large or bold text, headings |
| #5BB521 text on black | 8.07:1 | AAA | Lc -51.5 | 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
#F1F8ED
oklch(97.1% 0.016 133.8)
-
Step 100
100
#DFF0D9
oklch(93.6% 0.035 137.5)
-
Step 200
200
#C5E4B8
oklch(88.5% 0.068 136.5)
-
Step 300
300
#9CD383
oklch(80.9% 0.122 136.3)
-
Step 400
400 (this color)
#5BB521
oklch(69% 0.195 136.6)
-
Step 500
500
#4BA100
oklch(63% 0.189 136.5)
-
Step 600
600
#3E8800
oklch(55.7% 0.167 136.5)
-
Step 700
700
#337200
oklch(49.1% 0.147 136.5)
-
Step 800
800
#285E00
oklch(42.8% 0.129 136.7)
-
Step 900
900
#214E00
oklch(37.7% 0.113 136.4)
-
Step 950
950
#112F00
oklch(27.1% 0.081 136.5)
#5BB521 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) | #BBA500 | 0.121 |
| Deuteranopia (no green cones) | #B09E33 | 0.121 |
| Tritanopia (no blue cones) | #56AE9A | 0.138 |
| Achromatopsia (no color) | #A0A0A0 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BB521
#5BB521
oklch(69% 0.195 136.6)
- #CA6EEA
#CA6EEA
oklch(69% 0.195 316.7)
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 #5BB521, closest first.
No curated palette has a color within ΔE 0.04 of #5BB521.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Leafy Green #51B73B ΔE 0.015
- Frog Green #58BC08 ΔE 0.023
- Grass #5CAC2D ΔE 0.028
- Leaf Green #5CA904 ΔE 0.033
- Leaf #71AA34 ΔE 0.041
- Dark Lime #84B701 ΔE 0.042
- Shamrock Green #02C14D ΔE 0.044
- Dark Lime Green #7EBD01 ΔE 0.044
Use #5BB521 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.