#51973F
Closest named color: Fern Green (#548D44). oklch(61% 0.142 139.6), rgb(81, 151, 63).
Aa
Black text reads best on this color (5.84:1).
About this color
#51973F is a medium-dark, vivid green. In OKLCH its lightness is 61%, its chroma 0.142 and its hue 140°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Fern Green (#548D44), ΔE 0.032 away. Black text reads best on it, at 5.84:1.
| Hue family | Greens |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Fern Green (#548D44) |
| Black text | 5.84:1 |
| White text | 3.59:1 |
Values
| HEX | #51973F |
| RGB | rgb(81, 151, 63) |
| HSL | hsl(108, 41%, 42%) |
| OKLCH | oklch(61% 0.142 139.6) |
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 #51973F | 3.59:1 | AA large text | Lc -68.8 | Content text, not long reading |
| Black text on #51973F | 5.84:1 | AA | Lc 40.8 | Non-text elements, placeholder text |
| #51973F text on white | 3.59:1 | AA large text | Lc 63.3 | Content text, not long reading |
| #51973F text on black | 5.84:1 | AA | Lc -38.4 | Non-text elements, placeholder text |
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
#F2F7F1
oklch(97.1% 0.01 140.5)
-
Step 100
100
#E3EDE1
oklch(93.5% 0.019 140.5)
-
Step 200
200
#CCE0C8
oklch(88.5% 0.039 140.5)
-
Step 300
300
#AACCA1
oklch(80.9% 0.07 139.2)
-
Step 400
400
#7BB26E
oklch(70.8% 0.112 139.7)
-
Step 500
500 (this color)
#51973F
oklch(61% 0.142 139.6)
-
Step 600
600
#3A8824
oklch(55.7% 0.155 139.7)
-
Step 700
700
#2C7315
oklch(49.2% 0.144 139.5)
-
Step 800
800
#265E15
oklch(42.8% 0.119 139.5)
-
Step 900
900
#244D19
oklch(37.7% 0.093 139.5)
-
Step 950
950
#162D10
oklch(27% 0.058 139.5)
#51973F 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) | #9B8B36 | 0.096 |
| Deuteranopia (no green cones) | #918546 | 0.096 |
| Tritanopia (no blue cones) | #4B9284 | 0.097 |
| Achromatopsia (no color) | #878787 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51973F
#51973F
oklch(61% 0.142 139.6)
- #A864B8
#A864B8
oklch(61% 0.142 319.8)
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 #51973F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Fern Green #548D44 ΔE 0.032
- Light Forest Green #4F9153 ΔE 0.033
- Olive Drab #6B8E23 ΔE 0.034
- Muted Green #5FA052 ΔE 0.035
- Mossy Green #638B27 ΔE 0.036
- Flat Green #699D4C ΔE 0.036
- Moss Green #658B38 ΔE 0.037
- Sap Green #5C8B15 ΔE 0.038
Use #51973F 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.