#51A577
Closest named color: Tea (#65AB7C). oklch(65.7% 0.108 157.5), rgb(81, 165, 119).
Aa
Black text reads best on this color (6.99:1).
About this color
#51A577 is a medium-light, moderately saturated green. In OKLCH its lightness is 66%, its chroma 0.108 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Tea (#65AB7C), ΔE 0.028 away. Black text reads best on it, at 6.99:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.108) |
| Temperature | in between |
| Nearest name | Tea (#65AB7C) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #51A577 |
| RGB | rgb(81, 165, 119) |
| HSL | hsl(147, 34%, 48%) |
| OKLCH | oklch(65.7% 0.108 157.5) |
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 #51A577 | 3.00:1 | AA large text | Lc -61.8 | Content text, not long reading |
| Black text on #51A577 | 6.99:1 | AA | Lc 47.6 | Large or bold text, headings |
| #51A577 text on white | 3.00:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #51A577 text on black | 6.99:1 | AA | Lc -45.3 | 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 500.
-
Step 50
50
#F2F7F4
oklch(97.2% 0.007 160.1)
-
Step 100
100
#E2EDE6
oklch(93.6% 0.015 158.2)
-
Step 200
200
#CADFD2
oklch(88.4% 0.029 158.6)
-
Step 300
300
#A5CBB3
oklch(80.8% 0.053 157.3)
-
Step 400
400
#72B18C
oklch(70.7% 0.085 157.6)
-
Step 500
500 (this color)
#51A577
oklch(65.7% 0.108 157.5)
-
Step 600
600
#238757
oklch(55.5% 0.117 157.5)
-
Step 700
700
#137347
oklch(49.2% 0.11 157.2)
-
Step 800
800
#155D3B
oklch(42.6% 0.09 157.8)
-
Step 900
900
#1B4D33
oklch(37.8% 0.07 157.6)
-
Step 950
950
#112D1E
oklch(27% 0.044 158)
#51A577 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) | #A49A74 | 0.100 |
| Deuteranopia (no green cones) | #98917A | 0.098 |
| Tritanopia (no blue cones) | #39A499 | 0.051 |
| Achromatopsia (no color) | #959595 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A577
#51A577
oklch(65.7% 0.108 157.5)
- #BB77A9
#BB77A9
oklch(65.7% 0.107 337.1)
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 #51A577, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tea #65AB7C ΔE 0.028
- Jade #1FA774 ΔE 0.030
- Dark Seafoam Green #3EAF76 ΔE 0.031
- Algae #54AC68 ΔE 0.033
- Seaweed Green #35AD6B ΔE 0.038
- Bluey Green #2BB179 ΔE 0.038
- Dusty Green #76A973 ΔE 0.040
- Dull Green #74A662 ΔE 0.041
Use #51A577 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.