#51931F
Closest named color: Sap Green (#5C8B15). oklch(59.7% 0.16 135.2), rgb(81, 147, 31).
Aa
Black text reads best on this color (5.54:1).
About this color
#51931F is a medium-dark, vivid green. In OKLCH its lightness is 60%, its chroma 0.160 and its hue 135°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Sap Green (#5C8B15), ΔE 0.023 away. Black text reads best on it, at 5.54:1.
| Hue family | Greens |
| Lightness | medium-dark (60%) |
| Chroma | vivid (0.160) |
| Temperature | in between |
| Nearest name | Sap Green (#5C8B15) |
| Black text | 5.54:1 |
| White text | 3.78:1 |
Values
| HEX | #51931F |
| RGB | rgb(81, 147, 31) |
| HSL | hsl(94, 65%, 35%) |
| OKLCH | oklch(59.7% 0.16 135.2) |
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 #51931F | 3.78:1 | AA large text | Lc -70.6 | Content text, not long reading |
| Black text on #51931F | 5.54:1 | AA | Lc 38.9 | Non-text elements, placeholder text |
| #51931F text on white | 3.78:1 | AA large text | Lc 65.1 | Content text, not long reading |
| #51931F text on black | 5.54:1 | AA | Lc -36.5 | 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
#F2F7F0
oklch(97% 0.011 136.6)
-
Step 100
100
#E3EEDF
oklch(93.7% 0.023 137.2)
-
Step 200
200
#CDE0C4
oklch(88.5% 0.043 135.5)
-
Step 300
300
#ABCC9A
oklch(80.8% 0.077 135.1)
-
Step 400
400
#7EB260
oklch(70.8% 0.125 135)
-
Step 500
500 (this color)
#51931F
oklch(59.7% 0.16 135.2)
-
Step 600
600
#448700
oklch(55.7% 0.163 135.2)
-
Step 700
700
#387100
oklch(49% 0.143 135.1)
-
Step 800
800
#2D5D00
oklch(42.7% 0.125 135.1)
-
Step 900
900
#264D07
oklch(37.7% 0.105 135.3)
-
Step 950
950
#172D08
oklch(26.9% 0.066 135)
#51931F 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) | #998600 | 0.096 |
| Deuteranopia (no green cones) | #90812C | 0.097 |
| Tritanopia (no blue cones) | #4F8D7D | 0.116 |
| Achromatopsia (no color) | #838383 | 0.160 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #51931F
#51931F
oklch(59.7% 0.16 135.2)
- #A25DBF
#A25DBF
oklch(59.6% 0.159 315)
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 #51931F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sap Green #5C8B15 ΔE 0.023
- Grass Green #3F9B0B ΔE 0.030
- Mossy Green #638B27 ΔE 0.031
- Olive Drab #6B8E23 ΔE 0.032
- Grassy Green #419C03 ΔE 0.033
- Dark Yellow Green #728F02 ΔE 0.036
- Irish Green #019529 ΔE 0.040
- Kelley Green #009337 ΔE 0.041
Use #51931F 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.