#51A573
Closest named color: Jade (#1FA774). oklch(65.6% 0.112 155.5), rgb(81, 165, 115).
Aa
Black text reads best on this color (6.97:1).
About this color
#51A573 is a medium-light, moderately saturated green. In OKLCH its lightness is 66%, its chroma 0.112 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Jade (#1FA774), ΔE 0.028 away. Black text reads best on it, at 6.97:1.
| Hue family | Greens |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.112) |
| Temperature | in between |
| Nearest name | Jade (#1FA774) |
| Black text | 6.97:1 |
| White text | 3.00:1 |
Values
| HEX | #51A573 |
| RGB | rgb(81, 165, 115) |
| HSL | hsl(144, 34%, 48%) |
| OKLCH | oklch(65.6% 0.112 155.5) |
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 #51A573 | 3.00:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #51A573 | 6.97:1 | AA | Lc 47.5 | Large or bold text, headings |
| #51A573 text on white | 3.00:1 | AA large text | Lc 56.6 | Large or bold text, headings |
| #51A573 text on black | 6.97:1 | AA | Lc -45.2 | 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
#F2F7F3
oklch(97.1% 0.007 151.9)
-
Step 100
100
#E2EDE5
oklch(93.6% 0.016 154.5)
-
Step 200
200
#CADFD1
oklch(88.4% 0.029 156.6)
-
Step 300
300
#A5CCB2
oklch(81% 0.055 155.8)
-
Step 400
400
#72B189
oklch(70.6% 0.088 155.6)
-
Step 500
500 (this color)
#51A573
oklch(65.6% 0.112 155.5)
-
Step 600
600
#248853
oklch(55.7% 0.122 155.2)
-
Step 700
700
#147344
oklch(49.1% 0.113 155.5)
-
Step 800
800
#165E38
oklch(42.8% 0.094 155.3)
-
Step 900
900
#1B4D30
oklch(37.8% 0.073 155)
-
Step 950
950
#112D1D
oklch(27% 0.046 156.4)
#51A573 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) | #A49A70 | 0.100 |
| Deuteranopia (no green cones) | #989176 | 0.098 |
| Tritanopia (no blue cones) | #3BA498 | 0.054 |
| Achromatopsia (no color) | #959595 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51A573
#51A573
oklch(65.6% 0.112 155.5)
- #BB76AB
#BB76AB
oklch(65.6% 0.111 335.7)
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 #51A573, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jade #1FA774 ΔE 0.028
- Algae #54AC68 ΔE 0.029
- Tea #65AB7C ΔE 0.029
- Dark Seafoam Green #3EAF76 ΔE 0.029
- Seaweed Green #35AD6B ΔE 0.034
- Bluey Green #2BB179 ΔE 0.037
- Dull Green #74A662 ΔE 0.038
- Muted Green #5FA052 ΔE 0.038
Use #51A573 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.