#51B367
Closest named color: Boring Green (#63B365). oklch(68.9% 0.144 148.7), rgb(81, 179, 103).
Aa
Black text reads best on this color (7.99:1).
About this color
#51B367 is a medium-light, vivid green. In OKLCH its lightness is 69%, its chroma 0.144 and its hue 149°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Boring Green (#63B365), ΔE 0.015 away. Black text reads best on it, at 7.99:1.
| Hue family | Greens |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.144) |
| Temperature | in between |
| Nearest name | Boring Green (#63B365) |
| Black text | 7.99:1 |
| White text | 2.62:1 |
Values
| HEX | #51B367 |
| RGB | rgb(81, 179, 103) |
| HSL | hsl(133, 39%, 51%) |
| OKLCH | oklch(68.9% 0.144 148.7) |
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 #51B367 | 2.62:1 | Fails | Lc -56.1 | Large or bold text, headings |
| Black text on #51B367 | 7.99:1 | AAA | Lc 53.1 | Large or bold text, headings |
| #51B367 text on white | 2.62:1 | Fails | Lc 50.9 | Large or bold text, headings |
| #51B367 text on black | 7.99:1 | AAA | Lc -51.0 | 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
#F0F8F1
oklch(97.1% 0.013 149.3)
-
Step 100
100
#DFEFE0
oklch(93.6% 0.026 147.1)
-
Step 200
200
#C3E3C7
oklch(88.5% 0.051 148.7)
-
Step 300
300
#98D1A1
oklch(80.9% 0.089 148.9)
-
Step 400
400 (this color)
#51B367
oklch(68.9% 0.144 148.7)
-
Step 500
500
#00A545
oklch(63% 0.179 148.7)
-
Step 600
600
#008B39
oklch(55.6% 0.158 148.7)
-
Step 700
700
#00752F
oklch(49.1% 0.139 148.8)
-
Step 800
800
#006025
oklch(42.7% 0.121 148.7)
-
Step 900
900
#00501E
oklch(37.6% 0.107 148.8)
-
Step 950
950
#01300F
oklch(27% 0.076 148.5)
#51B367 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) | #B4A561 | 0.117 |
| Deuteranopia (no green cones) | #A79C6C | 0.116 |
| Tritanopia (no blue cones) | #3CB0A0 | 0.081 |
| Achromatopsia (no color) | #A0A0A0 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51B367
#51B367
oklch(68.9% 0.144 148.7)
- #CB78C7
#CB78C7
oklch(68.9% 0.144 328.7)
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 #51B367, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Boring Green #63B365 ΔE 0.015
- Medium Sea Green #3CB371 ΔE 0.016
- Dark Pastel Green #56AE57 ΔE 0.019
- Algae #54AC68 ΔE 0.021
- Cool Green #33B864 ΔE 0.023
- Jade Green #2BAF6A ΔE 0.027
- Dark Seafoam Green #3EAF76 ΔE 0.028
- Seaweed Green #35AD6B ΔE 0.028
Use #51B367 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.